Why the door sweats and how to get rid of excess moisture: instructions for solving the problem. Why is the front iron door sweating. Causes of condensation and remedies Condensation on a metal door frame what to do

The first reason for the formation of condensation on the front door is based on high humidity when the figure exceeds 55%. Then the collection of condensate occurs on the surface, where the temperature is slightly below the "dew point". In winter, such a surface is precisely the front door.

It is important to adhere to indoor air humidity of about 45% for the health of residents. The humidity of the indoor climate is affected by both ventilation devices and the temperature of the heated air in the room.

The second reason for condensate is hidden in low thermal insulation - the door is more prone to a large amount of condensate due to poor sealing between the metal sheet and the frame. In a typical embodiment, there is not enough air outflow for those purposes, so that vapors come out, but it is quite enough for their deposition on the surface.

Peculiar "cold bridges" with an increased thermal conductivity on the front door are concentrated mainly on the door handle, peephole, feigned part. Vulnerable freezing points especially concern metal doors, which have increased.

Increased humidity in the room is associated with supply and exhaust ventilation in the room

Equipping a dwelling with metal-plastic windows and anti-vandal metal entrances, they do not always pay due attention to supply and exhaust ventilation. An improperly equipped system or a complete lack of ventilation in the room leads to an increase in the humidity indicator inside.

There is no need to think about the flow of air, since the old door made of wood was able to provide natural ventilation, passing dry air from the outside. A humidity of only 65% ​​can lead to a number of negative consequences and the formation of condensate.

Ways to eliminate condensation on the front doors

The method consists in providing an inflow of dry fresh air from the outside and an outflow of vapors from the room. It is possible to install a “warm curtain”, which will heat the door with heated air. The surface temperature of the door leaf will rise and the dew point will shift.

Insulating the door leaf will not eradicate condensation problems. Condensing moisture settles due to the large temperature difference between outside and inside. It is recommended in this embodiment to equip an unheated vestibule at the entrance.

Not superfluous above the entrance will be the equipment of a visor that protects the door from direct exposure to the rays of the sun and precipitation. It is recommended to open the metal sheet of the front door with special powder polymers. It is better to fill all hollow elements in a metal door with foam in order to exclude the manifestations of cold bridges.

The metal door is durable and reliable, but has one significant drawback - the metal is easily destroyed by moisture. Entrance iron doors, which are located in the zone of contact between warm and cold air, are especially affected by condensation, which contributes to the formation of moisture droplets on the surface of the door. How to avoid condensation on metal front doors? What should be done to protect the metal sheathing of the front door from premature destruction? We will try to answer these questions in this article.

Metal entrance doors: advantages and disadvantages

Entrance doors provide reliable protection of the home from unauthorized intrusions, they are distinguished by high strength, reliability and durability. They are allowed to be installed in city apartments and country houses, while metal door leaves perfectly isolate the room from drafts, low temperatures, dust, and precipitation. Metal door leafs reduce the noise level, serve as an excellent soundproof barrier. In the event of a fire, metal doors prevent the entry of smoke into the apartment and prevent the rapid spread of fire.

With all the advantages of metal doors, the structures have one very big drawback - the rapid deterioration of the metal sheathing of the front door with constant exposure to high humidity. Even special compounds cannot prevent the development of rust on door panels when interacting with water.

Condensation on the iron door: causes of the phenomenon

Condensation - droplets of moisture on the surface of the door skin. Moisture appears at a large temperature difference, when it is very warm inside the room, and outside the doors of the house the thermometer mark drops to very low values. Condensation is especially often observed in country or country houses, in which there is only a single entrance door and there is no transitional vestibule (“cold” corridor).

When the air temperature inside the house rises, warm currents spread throughout the rooms. When heated air reaches a cold metal front door, it quickly cools down, turning into mist, which settles on the structural door elements. Accumulating, water dust turns into drops flowing down the metal door leaf. A similar phenomenon can be seen on window panes, especially if the glazing is made in one thread.

Often the reason for the formation of condensation is a sharp difference in temperature between the street and the room.

How to avoid condensation and save a metal door?

There are several reasons that exacerbate the appearance of condensation on the door during the cold season:

• The presence of gaps (cold bridges) between the door leaf and the frame of the box. When installing a metal door, it is worth carefully isolating possible voids and cracks, using special insulation materials: mounting foam, tow, mineral wool, mortar, polystyrene. Cold bridges occur in places where locks are inserted, door eyes, inside the metal door leaf in the area of ​​strengthening the stiffening ribs of the spatial frame.

Advice! When purchasing a finished metal door, you should make sure that additional insulation of the door leaf has been completed.

• Moisture can condense not only on the metal surface of the door, but also on the slopes around the opening, which is possible if the tightness of the door to the frame is broken. In this case, the formation of condensate or frost is observed on the slopes (with a significant decrease in the outside air temperature).

The equipment of a special room in front of the door (tambour) or an unheated corridor can help to avoid the problem of condensation. When developing a floor plan for a country house, it is worth immediately considering the construction of such a room.

The equipment of entrance doors with canopies or visors will somewhat defuse the problem. In this case, it is possible to avoid the impact of precipitation.

Additional finishing of metal door panels with special protective compounds or panels with weather-resistant impregnation reduces the risk of premature destruction of the door from condensation.
Insulation of the front door with sheet foam, followed by decorative trim, will reduce the occurrence of condensate.

Causes of condensation on the front doors: video

Condensation on the doors: photo

Causes of condensation on the front door and how to eliminate it.

Residents of apartment buildings do not know anything about why the front door can fog up. This is due to the fact that the air in the entrance is slightly warmer than outside, so the difference between the temperature inside the house and in the entrance is not so big.

Accordingly, condensation does not form on the entrance doors of the apartments. But the owners of country houses in almost half of the cases pay attention to the condensate that collects on the surface of the metal front door. In this article, we will talk about the causes of condensation and how to deal with it.

Why does condensation collect on the front metal door in a private, country house from the inside: reasons

There can be many reasons. The fact is that when choosing a front door, most home owners pay attention to the anti-burglary characteristics of the product. But at the same time, little attention is paid to atmospheric coatings, as well as thermal insulation. If there are voids inside the metal door, then in almost all cases condensation will form on its surface.

Causes of condensation:

• Lack of door insulation. Most often, doors are a box, which inside may or may not be filled with heat-insulating material. It all depends on which door manufacturer you choose.
• The presence of an air cushion between the door frame and the wall.
• Lock. It is through the keyhole that cold air can enter. Because of what the door is strongly cooled and a dew point appears on its surface, condensation forms.

The difference between the temperature in the house and outside is quite significant, and therefore the dew point is on the surface of the front door. Because of this, condensation forms on it. The fact is that condensate not only interferes, but also causes the formation of fungus on the walls in the house near the entrance. But it can also cause a violation of the integrity of the doors and their rapid failure. Therefore, the reason why the door sweats must be eliminated.

How to get rid of condensation on the front metal door in winter: tips

Initially, before choosing the front door, you need to take care of the insulation. Be sure to ask the manufacturer what material is used. To do this, it is necessary that the entire cavity inside the product be filled with heat-insulating material. It can be mineral wool, polystyrene foam, polystyrene. In addition, there are modern, more expensive thermal insulation materials. This will significantly affect the cost of doors.

Tips on how to get rid of condensation on the door:

1. You can sheathe the door on the outside with foam. Next, you should cover the surface with a coat of primer and weatherproof paint, or some other coating.
2. Be sure to take care of the insulation of the slopes. That is, the areas that are between the box and the wall. If the box is a pipe, you will need to drill a few holes in it and fill them with foam. This will provide better thermal insulation.
3. Refuse to install a peephole in the front metal door. It is this area that is the bridge of cold through which the cold penetrates into the house and the door is additionally cooled. This is what causes condensation.
4. Place a gasket on the keyhole. This is a kind of eye that moves. The keyhole is a bridge of cold, it must be eliminated.
5. Quite often, condensation forms due to insufficient and leaky fit of the door to the door frame. In this case, the problem is solved quite simply. It is necessary to glue a rubber seal, which will ensure a tight fit of the door surface to the frame. Most often, the companies that installed the door can take care of such a function. Be sure to check the presence of this seal.
6. You can use special tools that prevent fogging of the door. Keep in mind that if you cover the outside and inside of the door with this solution, the inside of the structure may fog up. This won't fix the problem. In this case, condensate will accumulate inside the door, which will lead to its failure.

Means against fogging of street metal doors: names, method of application

You can deal with condensation on the surface of the front door with the help of goods for motorists. Suitable means that prevent the formation of condensation on the windshield of the car.

Funds overview:

1. Anti-fog Very Lube. This is a bottle that contains 200 ml of solution. The product is applied once a month on a dry, clean surface of the door. Please note that the surface must be absolutely dry. Wash, dry it and only then apply the product.
2. Novax. This is also a tool that prevents the formation of condensate on the surface. Applied to the inside of the front door. After applying the agent, the surface is wiped with microfiber for glasses or smooth surfaces.
3. Shell Antifog. Anti-fogging agent that prevents the formation of condensation. It also removes fingerprints and cleans the surface. Therefore, it is necessary to apply the product for the first time in order to clean the door, and then shake the bottle again and apply a thin layer, evenly distributing it with microfiber.
4. Athas Rocks. A good anti-fog agent, in a bottle of 200 ml. It is sprayed onto the surface at a distance of 20 cm from it and spread with a soft cloth. Apply once a week.
5. Mathil Blackline. Anti-fogging agent, prevents the formation of condensate. In order to prevent the accumulation of water, it is necessary to apply the product both outside and inside the front door, evenly distributing it with a clean sponge or napkin.

Remember, these products do not eliminate the cause of condensation, but only form a special film on the surface of the door that changes the surface tension. Because of this, condensation still forms, but only rolls off the surface and forms a puddle of water under the door. This method will not save you from the appearance of a fungus or a violation of the integrity of the door. Before using such means, it is necessary to solve the problem with insufficient insulation and thermal insulation of the door.

The formation of condensation on the surface of the front door is a common problem faced by residents of private homes. In order to deal with this problem, you can equip a vestibule. If this is not possible, take care of the insulation of the doors, and also insulate the cold bridges.

VIDEO: The front door is sweating

Read in 5 min.

Sometimes there are drops of moisture on the door, as if it were crying or sweating. Why is this happening, is it bad for the door and how to deal with this phenomenon? Let's figure it out.

Why does the front metal door sweat?

Why does the front door sweat in a private house and almost never in apartments of multi-storey buildings?

The front door has a much lower resistance to heat transfer than the walls of the building, so it serves as a kind of cold bridge at the "street-house" border. When the temperature difference becomes significant - 30 degrees or more (depending on the humidity of the air, this value may be lower), the temperature on the door surface reaches the so-called "dew point" - a mark at which the air is saturated with water vapor, and dew drops form on the surface . There are special tables where it is calculated under what conditions moisture will appear on the surface of the door. So, for example, at an indoor temperature of 25 degrees and a relative humidity of 50%, the dew point is reached at 13.9 degrees. This means that if the surface of a wall or door cools to 13.9 degrees, condensation will form on it.

Thus, in most regions of Russia, in the autumn-winter period, condensation (the same dew) will form on the front door, and the reason for this is in physical and natural phenomena that do not depend on a person.

How is condensate harmful to an entrance metal door?

From the resulting moisture, the interior of the door primarily suffers. In addition, water penetrates into the web, which can lead to corrosion of the metal. Moreover, in high-quality doors, a special anti-corrosion coating is applied to all metal parts, even invisible to the layman's eye. But cheap doors have a much higher probability of metal corroding by corrosion (in other words, rust).

Condensation also adversely affects the thermal insulation characteristics of the door. When the front door sweats, moisture enters the pores of the insulation, significantly worsening its insulating properties.

The entrance metal door sweats: what to do?

The effect of “sweating” of the door is enhanced by “cold bridges” - all the metal parts that the door is equipped with and that pass through the canvas through (stiffening ribs, box, lock, etc.). What to do so that the front door does not sweat? There are several options:

• Purchase a high-quality door designed for use at the street-house boundary. Such doors have specially designed insulation, including insulated and metal elements. Thanks to this, there are no cold bridges.
• If your entrance metal door is sweating, but you do not plan to purchase a new one, you can insulate it yourself or by contacting specialized companies.
• Change the temperature of the inner surface of the door. To do this, in some cases, special fans are installed that blow warm air towards the front door.

It often happens that the front door frame sweats. The reason for this may be cracks in the walls - accordingly, to eliminate condensate, the cracks must be sealed. But most often this happens because the box is not insulated. It also needs to be insulated.

By the way, you can buy doors that have electric box heating.

The most effective, but also time-consuming solution is the “insulation” of the space in front of the door from the outside. For this, an unheated vestibule is separated. Due to the soft temperature transition, the dew point on the surface of the door is not reached, which means that condensation does not form.

In some cases, when it is not possible to make a vestibule, a canopy can replace it. It protects the door from the effects of precipitation, ultraviolet radiation and high humidity. Such a canopy should be large enough to protect the front metal door from rain and direct sunlight, not only when it is closed, but also when it is opened.

Metal entrance doors have many advantages that have ensured their popularity all over the world. But hermetic iron doors, despite their excellent performance, have some drawbacks.

Condensation on the entrance metal door is one of the most common problems homeowners face. Iron doors sweat most often in the cold season. Hoarfrost or condensation become noticeable on door handles, peepholes, cylinders, and the feigned part of an iron door. As practice shows, moisture can form not only on the metal elements of the input structure. Often, condensation is noticeable on the slopes next to the opening. The number of water droplets increases many times if the metal door leaf is not hermetically sealed to the box.

Causes of moisture on the canvas

There are several reasons for the occurrence of condensed moisture on an iron door.

High air humidity inside the apartment / house is the most important prerequisite for the appearance of condensate. Moreover, the more the air temperature differs outside and inside the metal sheet, the higher the likelihood of fogging the door.

Some components of the entrance structure made of metal (stiffening ribs, crossbars, duct details), when interacting with cooled air flows from the outside, instantly lose temperature throughout their entire thickness and, in contact with warm air inside the room, sweat.

Condensation on the iron door also occurs due to the physical properties of the metal, especially due to its increased thermal conductivity.

What is the harm of condensed moisture on the front door

Protecting doors from moisture is a task that requires an immediate solution. It is unprofitable for practical homeowners to turn a blind eye to fogging of the canvas. Soon this phenomenon will lead to corrosion of the metal. As a result, the door will not only lose its attractive appearance, but also its operational properties. When iron doors sweat, the functioning of their elements is disrupted: hinges, locks. Moisture, accumulating inside the web, significantly reduces the heat and noise insulation of the input structure. The above phenomena naturally reduce the operating time of even an expensive metal door made of high-quality materials.

Door models with high-quality seals

How to protect doors from moisture

To prevent condensation on the metal sheet of the entrance structure, it is necessary to reduce the level of humidity inside the house. To do this, they adjust the operation of the ventilation system in the room (sometimes new fans should be installed). It is useful to ventilate the apartment more often to establish good air circulation in the rooms.

Condensation on a metal door will no longer appear when installing a tambour door on the landing. The vestibule will protect the entrance structure from the direct influence of cold air currents.

Installing a vestibule is not possible in all cases. Another effective way to avoid fogging the door is to insulate the entrance block with foam and further decorate it with weather-resistant materials. To do this, the metal sheet is coated with powder-based polymers or decorated on the outside with panels with weather-resistant properties. It is optimal to fill all the hollow metal elements of the front door with standard mounting foam.

Condensation on a metal door frame will not appear if an outdoor unit is installed. The metal elements of the leaf in such a door are characterized by increased thermal insulation qualities.

Naturally, it is better to purchase doors from reputable manufacturers that manufacture products in full compliance with the stages of the technological process. High-quality input metal products are completed with elements treated with anti-corrosion agents and equipped with reliable insulating materials. It is reasonable to entrust the installation of doors to professionals who always pay attention to the insulation of cracks and gaps between the frame and the leaf. To prevent fogging of the structure facing the street, you can order insulation, both for the door itself and for the box. Another measure to combat condensate is to purchase doors without a peephole built into the canvas.