Sand insulation of the chimney of a country stove. Reliable chimney insulation. Preparatory work before the installation of thermal insulation

The operation of the bath must be absolutely safe for humans. To prevent fire from contact with a hot stove or chimney pipe, walls and ceilings, as well as hot surfaces, should be carefully insulated. We will describe in detail how to insulate the chimney pipe in the sauna in this article.

According to sad statistics, during 2014, up to 70% of fires in private baths arose due to incorrect thermal insulation of metal pipes. Therefore, in order to help our readers to protect themselves and their guests, we will talk about the materials, as well as the technology for performing pipe insulation in the bath.

A variety of insulating materials for baths

The favorite material for baths in Russia is wood. However, it tends to be very flammable. To avoid this, people have long learned how to insulate the chimney in the bath, as well as the stove and all surfaces - walls, ceilings. For this purpose, any available means were used - clay, asbestos or any other non-combustible materials with a low degree of thermal conductivity.

Another argument in favor of thermal insulation of the chimney is that in this case the pipe will cool much more slowly, and condensate will not accumulate in it.

It is a mistake to assume that a good solution regarding how to insulate a pipe in a bath is to mount sheet iron on the ceiling. The metal is able to heat up very quickly, which in no way prevents ignition, so it is not suitable for thermal insulation.

As an option, than to overlay the pipe in the bath, you can use red refractory bricks. However, for such a design, it is required to foresee the size of the room in advance, strengthen the foundation and choose a design.

Among the modern materials that decide the question of how to wrap a metal chimney pipe in a bath, the following are offered on the market:

Let's consider each of them in more detail.

Folgoizol

It is a two-layer material consisting of a heat-insulating component and foil. Thanks to the reflective layer, the room does not cool down so quickly, because up to 90% of the heat is retained inside the bath, so this is a very high-quality insulator.

Folgoizol is highly environmentally friendly, because food thick foil is used as a raw material. Such material is not afraid of ultraviolet and strong temperature fluctuations - the operating range is from -65 ºС to +175 ºС. Therefore, it will be a completely worthy choice for wrapping a pipe in a bath.

Note that foil isol is often mounted not only around the chimney, but also on the walls and on the ceiling of the steam room. It serves for high-quality steam and waterproofing, and also warms the bath room well.

A sauna upholstered from the inside with foil insulation can be compared with a thermos according to the principle of operation. It heats up quickly and cools down very slowly.

One of the options for wrapping a pipe in a bath is thermal insulation. For the production of thermal insulation, foamed polyethylene is used, hidden between two layers of foil, and the top layer of foil in the material is designed to protect the chimney from overheating.

Thermal insulation has appeared on the building materials market relatively recently. The thickness of such material ranges from 2-10 mm.

It is easy to manipulate with thermal insulation - you just need to wrap it around the chimney and secure it with metallic tape.

Sandwich pipe as a chimney

Recently, various manufacturers have begun to produce new safe sandwich pipes for baths and saunas. With such a design, there is no longer any need to worry about how to secure the pipe in the bath (more: “The advantages of the pipe for a sandwich bath in the construction of a chimney”). The design of such pipes provides for quick and convenient assembly of sections inserted into each other. Moreover, it is optimal to use such pipes with an iron furnace.

The sandwich pipe is a multilayer structure, inside of which there is a stainless steel frame, then a mineral or basalt wool insulation is laid, and a galvanized casing is put on top. Thanks to this structure, soot does not accumulate inside the chimney, the outer layer of metal does not experience overheating, and the whole structure looks beautiful and concise.

However, we note that it is advisable to install sandwich pipes in dry saunas. But for traditional Russian baths with high humidity, you should choose slightly different options for thermal insulation.

The method of isolating the chimney in a Russian bath

If a heater is installed in the bath, then refractory bricks are used to build the chimney. It is able to stay warm for a long time.

When building a brick chimney, it is not worth saving, but it is advisable to approach this issue very responsibly, because its durability depends on the quality of the work performed.

In this case, the best way to isolate the pipe in the bath from the ceiling, roof and other roof elements is to mount sheet metal on these surfaces.

In places where the chimney comes into contact with the roof and ceiling, the surfaces should be protected with asbestos sheets. On the walls near the pipe, you need to fix sheets of galvanized steel. Iron in this case is not advisable to use, since it is subject to corrosion.

Alternatively, a protective screen can be installed around the chimney, into which expanded clay is poured. It will serve as an additional protection against ignition of all wooden surfaces of the bath, and will also become a heat accumulator.

However, by insulating pipes alone, complete safety in the bath cannot be achieved. Similar actions must be performed with the oven, walls and ceiling.

Sauna stove insulation

Currently, baths often use simple metal stoves, which are sheathed with sheet metal on the sides and in the back, and are installed directly on the foundation. To ensure the preservation of heat in the bath for a long time and to give it presentability, the stove can be overlaid with red refractory bricks.

Currently, asbestos sheets are no longer used to insulate the stove, since when heated, it releases toxic substances.

It is advisable to use natural felt to insulate the oven. Although this material is quite expensive, it is an excellent insulator. In addition, when a spark hits, the felt does not flare up, but begins to smolder, so you will immediately notice the problem by the characteristic pungent odor.

When installing the stove on a wooden floor, you should first lay the felt in two layers, and then lay the brick in three rows. Sheet metal is mounted on the walls and floor around the furnace in pieces 50-70 cm high.

We hope that this article was able to answer the most common questions that beginner builders have. Recall that high-quality thermal insulation of the chimney, stove, as well as all surfaces of the bath will allow not only to keep warm longer, but also to protect yourself and your loved ones.

How to insulate a pipe in a bath: how to wrap and secure a metal chimney pipe, insulation from the ceiling, how to do it in a sauna, how to wrap or overlay, photo and video

Sauna chimney insulation: what material to insulate a metal chimney pipe

In any private house there is a stove or a fireplace, as well as its own bathhouse. The chimney almost always goes to the roof of the structure. Its durability, as well as fire safety, directly depends on the correct and reliable insulation of the chimney. For this reason, the question arises, how to insulate a chimney and what material to use to insulate a metal pipe? How to do it right with your own hands?

Sauna chimney insulation

The issue of chimney pipe insulation often arises among owners of private houses. Such work must be carried out in order to protect the structure from fire and destructive factors:

Experts recommend carry out such work in a complex, applying hydro- and fire-prevention thermal insulation. When choosing material for insulation, first of all, you need to think about the safety of the family. A live fire in an enclosed space always carries a danger to people's lives. If you do not perform high-quality and reliable protection of the ceiling, it can easily ignite.

Traditionally, wood is used to build a bath. It is easily flammable. Most people naively think that metal sheeting on the ceiling can serve as fire protection and therefore chimney insulation is not performed. Metal sheets heat up and do not save from overheating and ignition. Sometimes the chimney is insulated with red brick, but this material is not the most suitable design for a wood bath.

A large selection of modern materials allows you to choose the most suitable and securely insulate the chimney. Some of the most sought after and popular include:

foil insulator - such material will create the effect of a thermos, since heat always remains in the room, it heats up quickly and cools slowly;

thermal insulation - this material is wrapped around the surface of the chimney pipe and fixed with a special metallized adhesive tape or wire;
sandwich pipes are another find for bath insulation, they are highly safe, so they do not need additional insulation. They have several designed sections, they are put one into one. The finished design is great for a bath with a metal stove.

Also for the bath red brick used. It withstands high temperatures well and retains heat for a long time. When using red brick, the laying must be done correctly. The duration of the operation of the structure will depend on its quality. It is inappropriate to save here, since the cost of repairs will cost several times more.

What to use for winding a metal chimney?

In the old days, people used clay and asbestos, as well as other improvised natural materials, to insulate the chimney in the bath. The main thing in any material for insulation is poor thermal conductivity, so that ignition does not occur from high temperatures. The chimney and stove heat up very quickly and it is therefore important to properly insulate the chimney pipe for fire safety purposes.

Inside the structure with insulation at the time of heating condensation will not accumulate, which is very important. It will cool slowly, not break down so quickly, and its service life will be longer.

Teploizol

The article mentioned the material Teploizol and now we will dwell on its description in more detail. This is a relatively new type of insulating material. It is made from polyethylene foam. It is hidden between two layers of foil. It perfectly withstands elevated temperatures and is suitable for insulating chimneys. Manufacturers produce Teploizol thickness from 2 to 10 mm. The thicker the thermal insulation, the higher temperatures it can withstand:

2-5 mm - withstands temperatures from -30°C to +100°C;
5-10 mm - permissible operating temperature from -60°C to +150°C.

The upper foil layer protects the pipe from strong heating. The material is easy to work with. It is easy to work with it on your own. The pipe is wrapped with Teploizol using wire or metallized tape.

Folgoizol

Folgoizol is also an excellent choice for chimney insulation. It consists of a foil in two layers and a heat insulator. Due to the reflective properties of the foil, the material can keep up to 90% of the heat in the bath. In the list of similar materials, he takes first place. For its manufacture, thick food foil is used. In addition to excellent insulating properties, it also has other effective properties, for example, it is not afraid of UV, high temperatures. Folgoizol withstands temperatures from -65 ° C to + 175 ° C.

Folgoizol is harmless to health, since food foil is used for its production. Often it is used not only for insulating chimneys, it is also used to cover the walls and ceiling of the bath. It is considered an ideal insulation, hydro and vapor barrier for saunas and baths.

Sandwich pipes

Sandwich pipes can serve as a good solution for insulating a metal chimney. Manufacturers claim that such insulation will be reliable and safe. Installing this design , you can not think about isolation. It will consist of several sections, which are easily and quickly assembled into a single whole. With your own hands, you can quickly assemble the entire structure and install it. It is suitable for a metal pipe in a bath or sauna with an iron stove.

By their design, sandwich pipes resemble a pie with several layers. Inside there is a layer of stainless steel, and after it a layer of mineral wool or basalt insulation. Outside, the pipe is covered with a layer of galvanized steel. This design is a modern method of built-in chimney insulation in finished form. It will perform two important functions at once:

Such designs great for saunas, but for baths with a brick stove, you need to look for another option.

Insulation for a traditional Russian bath

The wooden structure of the roof may ignite when in contact with a hot pipe. To avoid a fire in the bath, it is isolated. Most often, mineral wool, fixed with wire, is used for this purpose. From above, the pipe is plastered with a clay-sand mortar and covered with a layer of galvanized steel roofing. Fix it with self-tapping screws and then carry out the installation. Insulation helps the roof and hardwood floor to protection against overheating and fire. With proper insulation of the pipe and its sealing, moisture will not enter the attic.

It is recommended to insulate the pipe outlet in the area of \u200b\u200bthe ceiling and roof with asbestos sheets. They have good protection against high temperatures. The walls near the inside of the pipe are upholstered with galvanized metal sheets. Ordinary iron ones are not suitable for such work, as they are susceptible to corrosion. It is desirable to make a box around the pipe in the place where it passes through the ceiling. Expanded clay is poured inside the box, which will serve as a good fire protection for the wooden floor. Expanded clay will also contain heat. Experts recommend, in addition to chimney insulation, not to forget about the ceiling, walls and stove in the bath.

It is recommended before starting work on insulating a metal chimney pipe, its outer part treat with heat-resistant sealant. Special sealant withstands temperatures up to +1000°C. The applied agent will not allow insulating materials to slide on the outer surface of the metal pipe.

Sauna chimney insulation: what material to insulate a metal chimney pipe

In any private house there is a stove or a fireplace, as well as its own bathhouse. The chimney almost always goes to the roof of the structure. Its durability as well as fire

Chimney insulation in a bath - how to wrap and insulate a metal pipe

One of the most important stages in the construction of a bath is the installation of a chimney. And the insulation of the chimney of the bath is a mandatory process during its construction, which has two goals: fire safety and corrosion protection.

If you do not make thermal insulation, then under the influence of temperature changes, condensate will form, gradually flowing inward and contributing to the destruction of the structure itself.

Insulated smoke ducts warm up faster, making the sauna stove work much more efficiently.

Depending on what the chimney of the bath is made of, various materials are used for its thermal insulation.

There are several varieties of already insulated chimneys for a sauna stove, the most common of which are stainless steel sandwich pipes.

There are also ceramic sections that are already installed in expanded clay concrete modules.

And now about everything in more detail.

Why insulate a chimney

During the operation of the sauna stove, its chimney becomes hot, and its inevitable proximity to combustible materials can lead to a fire.

If the chimney is made of brick, it heats up less, and if the chimney is made of metal, then much more.

Metal pipes heat up over 600 ° C, and their proximity to the wooden sheathing of the steam room is very dangerous, especially if the bath is directly adjacent to residential buildings.

The second, no less important problem is the appearance of condensate in the chimney. Condensation is the main enemy of all smoke exhaust systems.

This is not easy moisture that forms on the walls of the chimney, but an aqueous solution of sulfuric acid, which can destroy almost any material. It appears as a result of the passage of heated air through a still cold chimney.

As a result of the impact of condensate on an uninsulated brick chimney, the masonry is destroyed, since it has the ability to penetrate into the microcracks of the brick, and when it freezes, it expands. Smoke exhaust paths made of metal also suffer greatly from condensate.

Metal of ordinary grades is not resistant to acids, therefore, from exposure to condensate, it very quickly becomes unusable.

The only way to combat the appearance of condensate is to isolate the smoke paths, in which the pipe will cool less, and the sauna stove will quickly enter the operating mode of combustion.

Materials for insulation

Insulation of chimneys can be done by various methods, using non-combustible materials.

The most common are:

Thermal insulation of the chimney with basalt and glass wool. Heaters used for both large surfaces of brick chimneys and pipes of relatively small diameter. Available as a filler, in rolls or in the form of mats. For its use, the manufacture of an additional casing is recommended.
The method of backfilling the space around the chimney with heat-insulating material: expanded clay, slag, broken bricks, special heat-insulating granules. This method involves the manufacture of an additional chimney casing.
Plastering. This is the most common, until recently, method of insulating brick chimneys. For this, a slag-lime mortar was used, applied with a layer of 5-7 cm on a reinforcing mesh. After drying, a sand-cement mortar of the same thickness was applied to it. But when heating and cooling the smoke exhaust system, such a heater cracked and required annual repairs, so this method is considered unjustified in terms of labor costs and efficiency.
Chimney insulation with modern polyethylene foam materials. "Teploizol" or "Folgoizol" is available in rolls, has a low weight and good elasticity, it can be cut well, which makes it accessible even for non-professionals to work with it. This is the simplest and most inexpensive way to insulate chimneys, which is widely used today.

The choice of insulation for the chimney

The choice of insulation, for insulating the chimney with your own hands, must be approached carefully and seriously.

You should not buy the cheapest one, because it must have good thermal insulation properties, be easy to use, do not require additional reinforcement of the supporting structures of the roof and floors, be non-toxic and non-combustible.

Stone or basalt wool is a wonderful thermal insulation made from basalt rocks.

This insulation withstands prolonged exposure to sufficiently high temperatures and does not burn, even when in contact with an open fire. In addition, it does not emit any toxic or unpleasant odors when heated. Such a heater can be safely called an environmentally friendly material.

Glass wool is a type of mineral wool insulation made on the basis of glass industry waste. Between its fibers contains a large number of voids, so it retains heat well.

Glass wool does not burn and does not absorb moisture, and, moreover, is not subject to decay and rodents. It is not expensive and easy to use. Most often produced in slabs and rolls.

Teploizol or foilizol are multifunctional types of insulation made of polyethylene foam and covered with a sheet of aluminum foil. It is produced in rolls and has a thickness of 2 to 10 mm. They can perfectly isolate the chimney of the bath, as these heaters can withstand heating up to 150C ° -170C °.

We make insulation with our own hands

Chimney insulation using mineral, basalt or glass wool can be done in two ways: insulation under the casing or insulation of the chimney without a casing.

In order to isolate the chimney with mineral wool mats, you need to cut out several pieces of the slab from them, which will correspond to the sides of the pipe from the outside.

Then, with the help of wire firmware, fix them on the chimney.

Important! There should be no voids between the thermal insulation layer, otherwise the insulation will lose its effectiveness.

To insulate a metal pipe, you need to wrap it with basalt wool and secure it with wire around the entire perimeter. After that, put a second pipe of a larger diameter on the chimney to make a kind of sandwich.

This method of thermal insulation of chimneys is the most effective and simple, but it allows to reduce heat loss by more than two times, as well as significantly reduce the fire hazard and the formation of condensate in smoke exhaust systems and protect them from destruction.

Thus, thermal insulation contributes to an increase in thermal efficiency and safe use of furnaces. At the same time, it gives the building and the structure itself a more aesthetic appearance.

Chimney insulation

How to isolate a metal pipe in a bath. Chimney insulation materials, fire safety and do-it-yourself insulation installation.

How to insulate a metal chimney pipe?

Having your own country house, you need to take care of warming up the rooms in the cold season. A stove or other heating system needs a chimney to be installed. The smoke exhaust pipe is the main element of the heat supply communications. For its effective functioning, it is necessary to insulate the chimney from the outside.

The relevance of thermal insulation

During combustion, condensate is formed on the surface of the flue, which includes a chemical series of oxides. Interacting, the elements form weak acids (carbonic, sulfuric, etc.) that can destroy the metal surface. It is for this reason that chimney insulation is necessary.

Proper installation of thermal insulation helps prevent fires inside the premises and will not allow the roof to ignite. Well-heated chimney pipes improve draft in the fireplace, boiler and stove, there is less tar and burning deposits in it. The efficiency of the heating unit is significantly increased.

Positive factors of an insulated chimney

Before answering the question - how to insulate the pipe, it is necessary to highlight the advantages of an insulated chimney.

An insulated gas outlet provides protection for the heating system from the effects of the external environment and combustion products. Of course, thermal insulation cannot completely protect the structure from destruction, but it will extend its service life. This happens due to the following factors:

Pipe insulation allows maintaining thermal balance in the middle of the structure, eliminating the possibility of aggressive acids and condensate falling onto the walls. The products of combustion are completely volatilized together with the smoke stream.
Chimney insulation minimizes the possibility of a temperature difference between the cooled flue and hot steam.
Increased energy-saving properties that contribute to fuel economy.
The strength of the steam outlet structure increases due to the reinforcing frame.

Properly selected chimney insulation increases the frost-resistant properties of the system, ensures long-term preservation of the appearance and increases the service life, which is very important.

The choice of material for thermal insulation

The main question of the owners of country houses with an autonomous heating system is how to insulate the chimney. In order to reliably insulate the outlets for the furnace or boiler, materials with a high degree of thermal insulation are used to ensure the thermal balance of the chimney on the roof.

Basalt insulation

Relevant for the insulation of the chimney mineral wool or basalt. Insulation is obtained from a melt of volcanic rock - gabbo-basalt. It is converted into fibers, due to which the insulating material has the advantages of:

retains up to 95% of heat;
characterized by good permeability of the outgoing steam;
different chemical and corrosion resistance;
prevents the growth of fungus and mold on the surface of the chimney on the roof;
vibration and heat resistant;
made of ecological materials;
not subject to destruction under the influence of ultraviolet radiation.

Stainless steel casing

The casing for the chimney is mounted on a pipe on the roof. The annular space is filled with basalt wool, covered with insulation from the outside, 5 cm thick. An asbestos chimney can be wrapped with this insulation.

Wooden shields

After the pipe is completely covered with wood, the empty cavity is filled with felt, slag, sand, mineral wool. Frame seams are necessarily covered with a waterproofing compound.

Slag-reinforced concrete insulation slabs

Insulation of the chimney in a private house using iron and cinder concrete slabs provides the smallest distance between the joints on the structure. The space inside and the corners are reinforced with mesh or wire, gypsum, clay and sand are poured in the form of a solution. Plaster is applied over the tiled insulation.

The specifics of insulation work

When insulating the chimney with your own hands, we take into account that during the operation of the heating boiler, the temperature in the smoke exhaust duct can reach 200 -300 degrees.

As insulation, it is better to choose a material with high heat-resistant properties: glass wool, mineral wool, basalt.

In the building materials market, thermal insulation is sold in the form of finished cylinders with a special foil screen. With their help, they make out the gas duct and adjacent roof elements - protecting them from fire and cold air. Tubular structures are sold in different diameters, which allows you to wrap different-sized smoke outlets.

Regulatory requirements for the installation of thermal insulation

Before insulating the chimney pipe, you must make sure that it is installed correctly.

The flue is carried out in accordance with the technological standards specified in GOST 52953-2008

The combustion products outlet pipe must be 5 m high. This indicator ensures optimal draft in the heating system.
A distance of at least 250 mm is required between the roof slab and the outer element of the boiler room.
If the building is covered with combustible materials, in particular, slate, roofing material, ondulin, then the insulated smoke exhaust structure must be equipped with a spark arrester.

After making sure that the system is installed correctly, you can proceed to subsequent work on winding with thermal insulation.

The main methods of insulation

The metal chimney pipe is insulated using various methods.

Steel chimney insulation technique

The chimney is insulated using a special solution. The composition is prepared from a dry mixture and water. The solution is applied with a spatula to the surface, spreading over the entire area. Then a fiberglass reinforcing frame is fixed on it, on which plaster is applied.

Gas boiler chimney insulation

Insulation for pipes of a gas boiler must have a number of increased heat-insulating and heat-resistant qualities.

Sandwich structures block condensate from settling on the surface, saving energy at the same time.

Sandwich chimney consists of a layer of mineral wool and two metal pipes. The upper element, with a large diameter, is the main sleeve, the smaller one is part of the steam outlet channel.

How to isolate such a chimney pipe with your own hands? You must follow the recommendations:

In the roof of the roof and ceilings, holes are made with a diameter of 25 cm larger than the chimney channel.
At this stage, it is necessary to insulate the chimney pipe with a layer of basalt wool. The thickness of the winding must be at least 5 cm.
The insulation around the pipe is fixed with steel wire.
A larger casing is put on top.

Upon completion of the work, the chimney is connected to a heating source and the surrounding riser is filled with expanded clay, clay or asbestos.

Sauna chimneys

Insulation of the chimney in the bath is aimed at improving the heat transfer of the heating source, which is a stone stove.

You can isolate the chimney in the steam room using the following options:

thermal insulation - a material made of foamed polyethylene, hidden between sheets of foil. Insulation rolls with a thickness of 2 - 10 mm are offered on the market. The foil surface reduces overheating of the pipe. The insulation is wrapped around the chimney, fixed with wire or metallized tape;
Filgoizol consists of two balls: a foil that saves more than 90% of the heat in the room and a heat insulator. The material is used to cover the walls and ceilings of the sauna, providing the effect of a thermos;
sandwich pipe, consisting of several sections. This option is suitable for saunas and baths with an iron stove.

To insulate a metal pipe means to ensure the optimal functioning of the heating system. Proper installation of chimney insulation with your own hands allows you to increase the operational life of the structure and the heat generator, and also prevents fire.

Chimney pipe insulation: possible ways

Chimney pipe insulation: the relevance of thermal insulation, the positive factors of an insulated chimney, the choice of material, the main methods of insulation

The article will discuss how and with what to isolate the chimney pipe. Several practical methods are presented.

Chimney pipe insulation is required to prevent leaks and overheating. Simply put, it allows you to increase the life of the structure. Experts recommend performing complex work, which includes hydro and fire insulation.

Sauna chimney

When performing insulation of a chimney in a bath, the safety of people should be a priority. The main threat indoors comes from open flames. Therefore, it must be protected, having previously made the overlap resistant to high temperatures.

Basically, baths are built from wood, a highly flammable material. A very common misconception is the belief that sheeting the ceiling with metal sheets is sufficient. But in reality, such protection is not enough. After all, the upholstery will still heat up, which can lead to ignition. A popular solution to the problem is to insulate the chimney with red brick. But this is not suitable for every bath design.

There are currently two good options for chimney insulation:

Folgoizol. A bath with such insulation will not lose heat, everything works like a thermos. At the same time, it warms up quite quickly, keeping the temperature for a long time.
Teploizol. The material is used for winding the chimney.

A popular solution is the use of sandwich pipes, which demonstrate a high degree of safety. The construction of the insulation consists of several sections that can be easily combined with each other. This option is also suitable for saunas with a metal stove.

It is important to responsibly approach the brickwork in the bath. The duration of the operation of the building directly depends on its quality. You can not save on materials or work. After all, the need for repairs in the future will be associated with much higher costs.

Winding of a metal chimney

“How to wrap a metal chimney pipe in a bath?” - a popular question among gardeners. After all, there are many materials used for this cottage. The absence of combustible substances in the coating is a paramount nuance that must be taken into account. It is preferable to use a quality material that has all the necessary properties. It must also be completely safe to use.

The most common materials:

glass wool;
Fibrous building materials;
Mineral wool.

Insulation of a metal chimney

Insulation of chimneys of a metal chimney is a separate topic for discussion. After all, it contains a number of nuances, which will be discussed later. This is a very difficult task, so it is recommended to perform it during the construction of the bath. It is more difficult to work with a finished building, because it may require rebuilding the roof.

A good solution would be to use sandwich pipes. This design is easy to manufacture, in addition, the cost of specialists will be reduced. However, the material itself does not belong to the budget. But the service life and quality fully justify its cost. Sandwich pipes are additionally insulated with mineral wool.

How to isolate the chimney, everyone decides for himself. It is important to remember that such insulation allows you to protect the chimney from the negative effects of combustion products, as well as moisture. If you do not worry about insulation in time, then there is a risk of destruction of the bath. After all, acid-enhanced condensate slowly destroys building materials. It poses the greatest threat in the spring, when the pipe begins to thaw (in more detail: "").

Box manufacturing

About how to insulate the iron pipe of the chimney, it was said earlier. Now you can move on to the next step. Many people think that making a chimney box is too difficult a task. In reality, this is not so. It is enough to approach the work responsibly, with knowledge of the matter.

Required tools:

Drill;
Scissors for metal;
Compass;
metal sheets;
Self-tapping screws.

Stages of work:

Hole preparation. Along the edges, it is necessary to fix the bars, which will act as a support for the body.
Two blanks are cut from a metal sheet. They are given a U-shape. Then the finished parts are screwed to the ceiling using self-tapping screws.
Again, two blanks are made, but they are already fixed on standing sheets with a small spade. It turns out a solid frame in the ceiling.
Now the bottom is made for the box from a metal sheet. In the center of the workpiece there should be a hole for the chimney, here you need a compass.
The box contains four fasteners of two centimeters. They are cut and bent perpendicular to the bottom.
Walls are attached to the bottom. Now a chimney is inserted into the box, it is additionally fixed with clamps. The voids are filled with an insulating layer.

Chimney installation

Installing a chimney is not as simple a task as it might seem at first glance. There are many nuances that should be taken into account. If the chimney is not installed with sufficient quality, this can lead to damage to property, as well as creating discomfort for the people inside, and harming their health.

Stages of work:

The preparatory stage, where a project of work is selected, materials are purchased, and the form of construction is determined. There are straight chimneys, as well as designs with various bends.
Now you can start assembling the chimney. Pipe joints, elbows and tees must be fastened with clamps.
Passing the chimney through the roof using a special tool. To begin with, the level of the slope of the roof is determined, based on the data obtained, a suitable place is selected. It cuts a hole for the workpiece. From above, everything is insulated with a roof cut, and from the inside - with a cover sheet. See also: "".
A special apron is fixed on the branch pipe. The pipe is extended to the required dimensions, its top is partially insulated with a special cover in the form of an umbrella. It will prevent atmospheric precipitation from entering the chimney.

Chimney fixture

The workpiece must be brought to the roof through the attic. All cracks, especially voids between the roof and the pipe, are filled with waterproofing. When removing the workpiece, you must remember safety precautions.

An elbow is used to secure the chimney pipe. It is designed to control the vertical arrangement of the structure. To give everything reliability, the pipe is additionally attached to the wall, using suitable brackets. Usually they are included in a ready-made set. They can also be made by hand, it is best to use metal corners as the basis for them.

As soon as the insulating structure is in place and securely fixed, it is necessary to close the chimney pipe with an umbrella. It is designed to protect the structure from precipitation, poplar fluff and fallen leaves. It is also necessary to think in advance how to cover up the chimney pipe, in order to avoid leaks.

Replacing a brick pipe with a metal one

If a brick chimney is not enough, it can be further extended with a metal pipe. The task is laborious, but quite realizable. It is important to approach it with all responsibility.

To begin with, a flat steel platform with a pipe is made. Moreover, its diameter should be the same as the diameter of the metal pipe that is planned to be used. The site must be securely fixed. It is fixed with dowels and screws. Sealing will add additional reliability.

Work order:

On the brickwork, you need to mark the points at which the mount will be installed. They can not be placed on the masonry seam. It is advisable to place them closer to the center of the brick, and not on its edge.
Holes are drilled in the marked places to accommodate the dowels. At the same points, holes are made on a flat platform, self-tapping screws will go there.
A refractory sealant is applied to the brick base, then a steel platform is placed there. Self-tapping screws are screwed into the dowels. It is important to monitor the fit and uniformity.
Now it remains to wait for the sealant to dry completely and proceed directly to extending the chimney using a metal pipe.

Important installation details:

If the length of the pipe section above the roof exceeds 1.5 m, it is recommended to equip it with special stretch marks that strengthen the structures (read also: "").
It is impossible to install a branch pipe, the length of which from the stove to the head is more than 5 m.
Installing special plugs allows you to get rid of condensate.
The section of the chimney above the roof must be longer than 1.5 m.
Do not narrow the pipe when installing the chimney.
Nearby structures made of flammable materials should not be heated to a temperature of 50 o C.
The chimney must not be placed near electrical wiring.

The decision on how to insulate a metal chimney pipe should be made based on the budget, as well as the needs of the structure. It is important to approach the task as responsibly as possible, performing work in full compliance with all norms and nuances. Then the insulation of the chimney will last a long time without any complaints.

The relevance of thermal insulation

Moisture and smoke generated during the combustion of fuel are aggressive factors affecting the brick chimney. The temperature difference in the cold season and the accumulated moisture settling on the walls fills the microcracks with water, and the stone structure collapses from the inside. Small ice crystals press from the inside and destroy it. An insulated chimney allows this to be excluded.
During combustion, condensate is formed on the surface of the flue, which includes a chemical series of oxides. Interacting, the elements form weak acids (carbonic, sulfuric, etc.) that can destroy the metal surface. It is for this reason that chimney insulation is necessary.
Proper installation of thermal insulation helps prevent fires inside the premises and will not allow the roof to ignite. Well-heated chimney pipes improve draft in the fireplace, boiler and stove, there is less tar and burning deposits in it. The efficiency of the heating unit is significantly increased.

Positive factors of an insulated chimney

Before answering the question - how to insulate the pipe, it is necessary to highlight the advantages of an insulated chimney.
An insulated gas outlet provides protection for the heating system from the effects of the external environment and combustion products. Of course, thermal insulation cannot completely protect the structure from destruction, but it will extend its service life. This happens due to the following factors:

Pipe insulation allows maintaining thermal balance in the middle of the structure, eliminating the possibility of aggressive acids and condensate falling onto the walls. The products of combustion are completely volatilized together with the smoke stream.
Chimney insulation minimizes the possibility of a temperature difference between the cooled flue and hot steam.
Increased energy-saving properties that contribute to fuel economy.
The strength of the steam outlet structure increases due to the reinforcing frame.

Properly selected chimney insulation increases the frost-resistant properties of the system, ensures long-term preservation of the appearance and increases the service life, which is very important.

The choice of material for thermal insulation

Basalt insulation

retains up to 95% of heat;
characterized by good permeability of the outgoing steam;
different chemical and corrosion resistance;
prevents the growth of fungus and mold on the surface of the chimney on the roof;
vibration and heat resistant;
made of ecological materials;
not subject to destruction under the influence of ultraviolet radiation.

Stainless steel casing

Metal "armor" in the form of a pipe made of stainless steel is used as an option for insulation. It is able to provide full protection against mechanical damage, moisture and other aggressive factors.
The casing for the chimney is mounted on a pipe on the roof. The annular space is filled with basalt wool, covered with insulation from the outside, 5 cm thick. An asbestos chimney can be wrapped with this insulation.

Wooden shields

Wooden shields are considered one of the simplest options for insulating a chimney pipe. Thermal insulation is made in the form of a wooden frame from plates of the appropriate size. On top of it, slate or other flooring is fixed, from which the roof of the dwelling is made.
After the pipe is completely covered with wood, the empty cavity is filled with felt, slag, sand, mineral wool. Frame seams are necessarily covered with a waterproofing compound.

Slag-reinforced concrete insulation slabs

The specifics of insulation work

When insulating the chimney with your own hands, we take into account that during the operation of the heating boiler, the temperature in the smoke exhaust duct can reach 200 -300 degrees.

As insulation, it is better to choose a material with high heat-resistant properties: glass wool, mineral wool, basalt.

Regulatory requirements for the installation of thermal insulation

Before insulating the chimney pipe, you must make sure that it is installed correctly.

The flue is carried out in accordance with the technological standards specified in GOST 52953-2008

The combustion products outlet pipe must be 5 m high. This indicator ensures optimal draft in the heating system.
A distance of at least 250 mm is required between the roof slab and the outer element of the boiler room.
If the building is covered with combustible materials, in particular, slate, roofing material, ondulin, then the insulated smoke exhaust structure must be equipped with a spark arrester.

After making sure that the system is installed correctly, you can proceed to subsequent work on winding with thermal insulation.

The main methods of insulation

The metal chimney pipe is insulated using various methods.

Steel chimney insulation technique

Gas boiler chimney insulation

Insulation for pipes of a gas boiler must have a number of increased heat-insulating and heat-resistant qualities.

Sandwich structures block condensate from settling on the surface, saving energy at the same time.

Sandwich chimney consists of a layer of mineral wool and two metal pipes. The upper element, with a large diameter, is the main sleeve, the smaller one is part of the steam outlet channel.
How to isolate such a chimney pipe with your own hands? You must follow the recommendations:

In the roof of the roof and ceilings, holes are made with a diameter of 25 cm larger than the chimney channel.
At this stage, it is necessary to insulate the chimney pipe with a layer of basalt wool. The thickness of the winding must be at least 5 cm.
The insulation around the pipe is fixed with steel wire.
A larger casing is put on top.

Upon completion of the work, the chimney is connected to a heating source and the surrounding riser is filled with expanded clay, clay or asbestos.

Sauna chimneys

Insulation of the chimney in the bath is aimed at improving the heat transfer of the heating source, which is a stone stove.

You can isolate the chimney in the steam room using the following options:

thermal insulation - a material made of foamed polyethylene, hidden between sheets of foil. Insulation rolls with a thickness of 2 - 10 mm are offered on the market. The foil surface reduces overheating of the pipe. The insulation is wrapped around the chimney, fixed with wire or metallized tape;
Filgoizol consists of two balls: a foil that saves more than 90% of the heat in the room and a heat insulator. The material is used to cover the walls and ceilings of the sauna, providing the effect of a thermos;
sandwich pipe, consisting of several sections. This option is suitable for saunas and baths with an iron stove.

When the house is built, the stove is equipped and the chimney pipe is brought out, it's time to think about protecting the roof from fire and moisture. For this, insulation is used. If this issue is worked out at the design stage of the house, then the solution of the technological difficulties that arise during the insulation process will already be provided and there should not be any particular difficulties. Otherwise, more serious efforts may be required. Let's figure out how to do-it-yourself chimney insulation and what kind of chimney sealant you may need.

Chimney insulation in the ceiling with mineral wool

Consequences of insufficient thermal insulation of chimneys

In the absence of a chimney waterproofing, it can fail very quickly. The reason for this may be:

Humidity. There is always dampness in the chimney. This is due to the fact that the liquid from the vapors escaping through the pipe undergoes condensation and remains on its walls.
Aggressive environment. When fuel is burned in a furnace, many harmful substances are formed. During the operation of the furnace, they almost completely exit through the chimney to the street. As soon as the stove is turned off, they begin to accumulate inside the pipes, leading to their destruction. Moreover, these processes can affect not only chimney pipes, but also the structures of the house itself. Especially often, owners are faced with this phenomenon at the end of the cold season.

Thermal insulation of chimneys will help to combat both of these phenomena.

The benefits of insulation

Chimney insulation in a bathhouse, sauna or private house can significantly extend the life of the chimney. This happens due to the influence of the following factors:

Reducing the contact of the walls with condensed masses.;
Reducing temperature fluctuations inside the pipe;
Increasing the strength of the chimney frame;
Increasing the efficiency of the furnace, which contributes to fuel savings.

Types of roof chimney insulation

Non-combustible insulation of the chimney from wood is carried out in order to achieve two main effects. In this regard, the following types of isolation are distinguished:

Thermal insulation;
Waterproofing.

It is best to immediately perform a comprehensive insulation, including both of these types of insulation.

Fireproof insulation for chimneys

The easiest way to create a chimney thermal insulation with your own hands is to install a sandwich chimney. In such structures, a layer of insulation has already been laid between the inner and outer pipes, thus solving the problem. Almost any master can handle the installation of such a unit, as they are equipped with structures for fixing, inspection and maintenance. The main thing in this case is to strictly adhere to the manufacturer's recommendations.

Another way to provide fire protection for air ducts is to build them out of brick. Due to the low thermal conductivity of the brick, the chimney does not heat up to excessively high temperature values. Due to this, additional fire-retardant treatment of air ducts will not be required.

Advice. Sometimes homeowners choose to lighten the load on the roof by complementing the brick chimney with a metal pipe. In this case, the methods for isolating the chimney in the bathhouse and other rooms are similar to those used for insulating a metal duct.

Isolation Methods

Methods for insulating chimney pipes differ depending on the materials used in their installation.

Brick chimneys can be insulated as follows.

Covering with plaster. For this purpose, a cement solution is used, in some cases supplementing it with lime. It is possible to use fine slag instead of sand. At the same time, at the initial stage, it is necessary to cover up all cracks and irregularities, then lay reinforcement, and only then plaster the pipe along its entire length.
The use of asbestos cement sheets. This method is applied similarly to the previous one. Only the final step is gluing the sheets with a solution. This technique is very beneficial in terms of heat saving and fire protection, but its disadvantage is the release of harmful substances, which leads to a limited scope of its application only to non-residential premises.

To isolate the chimney from stainless steel or other metal, other methods are used.

The simplest is the use of insulation coated with plaster on top. As a non-combustible thermal insulation for steel chimneys, you can choose basalt wool 5 cm thick. We wrap the pipe with it, fixing it with wire on top. Then the pipe is reinforced and covered with a layer of plaster. It is possible to replace the plaster with a stainless steel sheet. In this way, a heat-resistant structure is obtained, which significantly reduces the likelihood of a fire. Fire-retardant coating of air ducts with the help of special compounds will further increase the resistance to fire.

Roof passage insulation

One of the most critical areas where chimney insulation is needed is the passage through the roof. To do this, install a special box as follows. In all structures through which the chimney pipe passes, a hole is cut out, approximately 25-35 cm larger than its diameter. Asbestos or metal sheets are installed along the edges of the hole. All the space remaining before the pipe is filled with insulation. The design will be even more reliable if it is supplemented with a heat-resistant sealant for the chimney.

Attention! Even if you have correctly completed the fire-retardant treatment of air ducts, you are not relieved of the need to regularly take measures to clean them from burning, ash and other combustion products. Only all these measures in the complex are able to ensure the fire safety of a house, bath or sauna.

Waterproofing

Waterproofing refers to the sealing of the chimney at the point of its passage through the roof. It is here that moisture can penetrate inside the house, which can lead to the processes of decay and destruction of structures, both ceilings and the chimney itself. Therefore, sealing the chimney using silicone or silicate compounds is a very important condition for its normal functioning for a long time.

materials

Chimney waterproofing is not possible with any sealant. It must contain a flame retardant for air ducts that can withstand the temperature of hot gases. Such sealants are divided into two groups.

Heat-resistant chimney sealant is used on the outside of brick chimneys and in places where sandwich pipes pass through the roof and ceilings. They are made on the basis of silicone and can withstand heating up to 350 ° C.
The heat-resistant sealant for chimneys is able to withstand temperatures up to 1500 °.

They can treat places with the highest temperatures, including the boiler outlet. If a high-temperature pipe sealant is marked "fire-resistant", then it will not lose its properties even when it comes into contact with an open flame.

The answer to the question of which composition to choose depends on the material from which the chimney is made.

Heat-resistant silicone sealants vary in their properties depending on the components included in them. These data are indicated on the packaging. Divided into acidic and neutral. The first, drying, release acetic acid. In this regard, their use with materials that are not resistant to corrosion is contraindicated. Neutral thermal sealants have been developed for such materials.

Heat-resistant silicone sealants have the following qualities. They are resistant to UV radiation, and therefore they can be used outside the building. They have good adhesive properties, which allows them to be used with various materials. Even after drying, they retain some plasticity. They harden within hours or even days. This time is indicated in the instructions for silicone sealant and depends on external conditions.

Advice! Despite the fact that silicone has good adhesion to a smooth surface, it is still recommended to go over it with sandpaper or other abrasive to improve adhesion, followed by degreasing the surface.

Heat resistant sealants. Made on a silicate basis, they are able to withstand very high temperatures. With their help, pipe joints are processed. The downside is the poor ability to stay on smooth surfaces and the inability to use in the cold season.

If in the future it is planned to dismantle the chimney, it is advisable to use heat-resistant mounting foam for chimneys only for processing seams and joints. If the pipe is completely processed inside, it will be impossible to disassemble it, since the use of sealant leads to the fact that the surface becomes monolithic.

Due to the unpredictability of the need to disassemble a stainless steel chimney with sealant, experts still do not recommend using it in too large quantities.

Today, there are many ways to insulate a chimney. Knowing the features of the technologies and materials used, it is not difficult to do all the work with your own hands. This will help to ensure reliable operation of the chimney for a long time and reduce the likelihood of a fire or rotting structures.

Sauna chimney insulation

The issue of chimney pipe insulation often arises among owners of private houses. Such work must be carried out in order to protect the structure from fire and destructive factors:

overheat;
leakage at joints.

A large selection of modern materials allows you to choose the most suitable and securely insulate the chimney. Some of the most sought after and popular include:

What to use for winding a metal chimney?

Teploizol

2-5 mm - withstands temperatures from -30 o C to +100 o C;
5-10 mm - permissible operating temperature from -60 ° C to +150 ° C.

Folgoizol

Sandwich pipes

do not overheat outside;
do not accumulate soot.

Such designs great for saunas, but for baths with a brick stove, you need to look for another option.

Insulation for a traditional Russian bath

It is recommended before starting work on insulating a metal chimney pipe, its outer part treat with heat-resistant sealant. Special sealant withstands temperatures up to +1000 ° C. The applied agent will not allow insulating materials to slide on the outer surface of the metal pipe.