Modern roofing materials are beautiful and durable, no one will argue. However, the good old slate is also not stale on store shelves. After all, it is very cheap, it is not afraid of fire, and it has good other technical characteristics.
For the roof, only corrugated slate is used, the sheet dimensions of which make it possible to cover almost any roof with a minimum of waste. The main thing is that the slope of its slope should be at least 12 degrees. It is about the sizes 5, 6, 7, 8 of wave slate that will be discussed in this article.
Slate sheet size 6, 7, 8 wave.
There are four main types of asbestos-cement sheets for roofing:
- Flat;
- 6-wave;
- 7-wave;
- 8-wave.
Flat products are used in the construction of partitions and roofs, and wave products are exclusively roofing material. Their production technology and composition are the same, they differ only in cross-sectional profile.
The GOST size of flat slate in millimeters is slabs 2500x1200, 3000x1200, 3000x1500, 3600x1200 and 3600x1500. Their typical thickness is 6, 8 and 10 mm. The weight of such an asbestos-cement sheet ranges from 38 to 115 kg.
Table of sizes 6, 7, 8 mm slate and its price:
When calculating the amount of material under consideration required for the roof, one should focus not on its general dimensions in the marking, but on the workers. Each sheet of the wave sheet is superimposed on the previous one with an offset overlap. Therefore, cutting and displacement will require about 15–20% of the area of the covered roof.
Slate 5 wave sizes 1 sheet.
5-you corrugated slate or europrofile appeared on the market relatively recently, its release has been established only in Ukraine in the city of Balakleya.
With parameters identical to 8-we wave slate, the europrofile has a unique sheet geometry. Instead of standard waves, flat valleys are implemented in this model, which improves performance.
The parameters of the 5 wave slate are as follows:
- length: 1750.0 (mm);
- width: 1130.0 (mm);
- thickness: 5.8 (mm);
- regulated by: GOST 30340-2012.
The number of waves in slate and its practicality.
Wavy slate is produced in accordance with GOST 30340-95. According to this document, asbestos-cement corrugated sheets must have 6, 7 or 8 waves.
Sheets with 7 and 8 waves are the most practical. This is due to the small difference between their nominal and usable area. 8 wave slate has a total area (nominal) of 1.978 m2, and a useful area of 1.57 m2. That is, when installing such a slate on overlaps (1-2 waves on both sides), a small part of the material is lost. The same can be said about the 7 wave slate. Its nominal area is 1.715 m2, and its useful area is 1.3362.
The consumption of 6 wave slate, when installing the roof, will be slightly higher. The total area of a standard sheet with 6 waves is 1.97 m2. At the same time, the usable area is 1.41 m2. Thus, the overlaps take on about 20% of the total material.
In addition to slate with 6, 7 and 8 waves, some factories produce material with 5 waves. However, it should be understood that such material is not produced according to GOST standards, but according to individual specifications of the plant.
Detailed overall characteristics of the brands of wavy slate - table.
| Options | Nominal size of profile sheets | Limit deviations, mm | Sheet weight, kg | |
|---|---|---|---|---|
| 40/150 | 54/200 | |||
| Length L, mm | 1750 | 1750 | ±15 | — |
| Width B, mm. | ||||
| 6 wave sheet | — | 1125 | +10, -5 | 26,0 | 35,0 |
| 7 wave sheet | 980 | — | +10, -5 | 23,2 |
| 8 wave sheet | 1130 | — | +10, -5 | 26,1 |
| Thickness t, mm | 5,8 | 6,0; 7,5 | +1,0; -0,3 | — |
| Wave height. | ||||
| ordinary h, mm | 40 | 54 | +4, -3 | |
| overlapping h1, mm | 40 | 54 | +4, -5 | |
| overlapped h2, mm | 32 | 45 | +4, -6 | |
| Overlapping edge width b1, mm | 43 | 60 | ±7 | |
| Overlapping edge width b2, mm | 37 | 65 | — | |
| Wave pitch S, mm | 150 | 200 | — | |
How to calculate the required amount of slate.
We measure the length of the roof, and then divide this number by the width of the slate sheet. Having subtracted one tenth to overlap, we find out how many sheets we need for one row. And the distance from the base of the roof ridge to its lower overhang must be divided by the length of the slate sheet. Here we will add not 10, but 13 percent to the overlap. We round - here is the number of rows for you. Just in case, always buy a couple of sheets more than you calculated, as there is a chance that several sheets will crack during installation.
For more than 15 years, we have been performing prompt deliveries of building materials and providing customers with high-quality wave slate sheets and corrugated asbestos-cement sheets, the dimensions and price per sheet of which fully satisfy the needs of each specific customer. The excellent technical characteristics of the presented products have been tested by time and successful operation in all weather conditions. Implemented products do a good job with the tasks and have a considerable number of significant advantages:
- ease of installation;
- price per sheet, variety of sizes;
- fire resistance and excellent electrical insulating properties;
- ease of machining;
- low thermal conductivity, which allows the material to retain heat in the winter season and not overheat under the summer sun;
- affordable cost of wave slate;
- environmental friendliness - products do not emit toxic substances when heated;
- low noise level during precipitation;
- long period of operation.
Characteristics
Asbestos-cement slate is produced in accordance with GOST 30340-95. Following this approved standard, all asbestos cement sheets have 6,7,8 waves, depending on the choice of the consumer. Sheets with 8 waves are considered the most useful.
Profile dimensions are also standardized: there are only two types of section - 40/150 and 54/200. At first glance, it may seem that the consumer is very limited in the choice of wave slate, but this is not so. The roofing has been tested for many years of operation, so all parameters are accurate and measured by experts.
Types of wave slate
Slate wave price, which ranges from 180 to 500 rubles per sheet, is 7 wave and 8 wave, colored and gray. Here you can find out how much a sheet of slate 8 wave price costs. In our store, mainly 8-wave slate is presented, which is the most convenient and practical in construction. You can buy 8-wave slate from us in two options - it is 5.2 mm thick and 5.8 mm thick. In addition, we have a colored wave slate in 4 different colors: yellow, red, blue and green
Undoubtedly, during construction, you may also need other building materials, such as asbestos pipes, which are needed both for plumbing and for removing excess moisture from the roof.
When planning to buy wave slate in Moscow, you can contact our company without any hesitation. Being engaged in the supply of building materials from trusted domestic manufacturers, SPETSTORG guarantees each consumer the excellent quality of the goods sold, delivery on the same day in Moscow and the region, as well as good discounts and an impeccable level of service.
For more than 100 years, 8-wave slate has not lost its popularity as a roofing material. Knowing its size, you can calculate the required amount. Sheets also differ in thickness, weight and other characteristics. This must be taken into account before the construction of the roof. The size of the 8-wave will help calculate GOST. When laying the roof yourself, you should familiarize yourself with all the nuances of the process.
general characteristics
Sheets of 8-wave slate of a certain size are used in roofing. For such conditions, flat varieties of the material are not suitable.
Slate 8-wave, which must be considered before purchase, is made of asbestos cement. This is a fragile but very durable coating. Low cost along with a long service life make it in demand in the construction industry.
To correctly calculate the amount of material required for the roof, you need to know the size of the 8-wave slate sheet, its weight and thickness. You should also take into account the number of overlaps and cornice descent before purchasing. Correct calculations will allow you to purchase the required number of sheets of eight-wave slate, corresponding to the size of the roof, without excess or shortage.
Scope of application
The size of an 8-wave slate sheet is important for the construction of 1-2 storey buildings. They are very popular in this area. In addition to houses and cottages, the presented material is used to cover outbuildings, baths, etc. Sometimes it is used to equip a fence.
To install the roof on the truss system with your own hands, you need to know what load the foundation and supporting structures of the building are designed for. Indeed, as can be seen from the above parameters, slate is a rather heavy material.
It should only be used if the entire structure is designed for the appropriate weight of the roof. Otherwise, you will have to pay attention to a lighter, but more expensive material.
The size of the slate when arranging the roof
When covering the roof, it is important to know the size of the 8-wave slate sheet. It should be noted that the roof is equipped with such material at an angle of at least 12 degrees.
There are practically no restrictions on the use of such sheets. Its dimensions are suitable for any base. The width and length of the sheets make it possible to mount the material on the truss system as economically as possible. The use of cutting allows you to organize the process with a minimum amount of material waste.
GOST under the number 30340-95 regulates the production of such a product as 8-wave slate. Sheet size, weight and other characteristics sometimes differ from the parameters established by the standard. This may be due to the falsification of sheets or the use of their own technical conditions in production.
Sheet Options
If the manufacturing company does not have its own individual specifications for the production of slate, the sheets should not differ from the GOST parameters. Otherwise, such products will be regarded as defective building materials.
In the case when the manufacturer has manufactured 8-wave slate according to the standard, the sheet size will have a length of 175 cm and a width of 113 cm. The thickness of the asbestos-cement material can be 5; 5.2; 5.8 mm.
The weight of such a product will vary depending on the previous indicator. They can weigh 20, 20.6, and 26 kg, respectively.
For the correct calculation of the material, it is necessary to know the expected loads on the roof.
Brand and profile
According to GOST, domestic manufacturers provide the size of an eight-wave slate sheet in the manufacture with a certain height and wave pitch. There are two types of profile. Slate 40/150 belongs to the first brand, and 54/200 belongs to the second. In the first case, the wave height is 40 mm, and the wave step is 150 mm. In the second version, these parameters are 54 mm and 200 mm, respectively.
The profile of the presented products can be ordinary (VO), unified or reinforced (VU). Each of them is applied to a certain type of objects. When using a unified profile (117.5x112.5 cm), the least amount of waste remains. The VO brand (112x68 cm) is used in private construction, and the VU (280x100 cm) is used for industrial facilities.
Material calculation
The size of the 8-wave slate sheet will allow you to correctly calculate the required amount of material. It should be noted that the overlap in its width may be different. It happens in 1 or 2 waves.
To calculate the material, the length of the roof is first measured. The result is divided by the sheet width and 10% is added for overlap. This gives the developer the opportunity to calculate the amount of material per 1 row.
Then the distance from the base of the ridge to the lower overhang is measured. The result is divided by the length. The stock should be considered around 13%. This allows you to get the number of rows. Next, it will be easy to calculate the required amount of material.
When buying, you should take several sheets more than the value obtained. The material is quite fragile, so in case of breakage, you do not need to go to the store again.
Having learned the size of an 8-wave slate sheet, you can correctly calculate the required amount of material. It has a small difference between the nominal and usable area. The characteristics of this type of slate make it popular with builders. Low waste, durability and relatively low cost keep roofing at the peak of popularity.
A decade ago, wave asbestos-cement slate was the most popular roofing. Later, its position in the market was shaken. Modern analogues of this material appeared - from metal, bitumen and even plastic. However, despite this, many consumers, when covering the roof, prefer not the popular ondulin, but the usual wave slate.
This is explained by the fact that most modern materials have not yet passed the test of time, they poured into our markets only 10-15 years ago. Quite another thing is wave slate.
It is known that for him and 50 years of operation in our conditions is far from the limit. In addition to durability, slate has a lot of other advantages: low price, practicality, ease of installation.
Wave slate is rectangular asbestos-cement sheets with a wavy profile. They are made by molding from a plastic solution, consisting of:
- Portland cement grades M300-500 (80-90%);
- chrysotile asbestos (10-20%);
- water.
As part of the slate, Portland cement is in the role of a binder, and chrysotile-asbestos is in the role of a reinforcing aggregate. Chrysotile asbestos holds the brittle cement slurry in a predetermined wavy shape and creates a strong material structure.
Characteristics of wave slate
Consider the most important technical characteristics of wave slate, allowing it to be used everywhere, for roofs of premises for various purposes.
Number of waves
Wave slate is produced in accordance with GOST 30340-95. According to this document, asbestos-cement corrugated sheets must have 6.7 or 8 waves.
Sheets with 7 and 8 waves are the most practical. This is due to the small difference between their nominal and usable area. The eight-wave slate has a total area (nominal) of 1.978 m 2, and a useful area of 1.57 m 2. That is, when installing such a slate on overlaps (1-2 waves on both sides), a small part of the material is lost. The same can be said about the seven-wave slate. Its nominal area is 1.715 m 2, and the useful area is 1.3362.
The consumption of six-wave slate, when installing the roof, will be slightly higher. The total area of a standard sheet with 6 waves is 1.97 m2. At the same time, the useful area is 1.41 m 2. Thus, the overlaps take on about 20% of the total material.
In addition to slate with 6, 7 and 8 waves, some factories produce material with 5 waves. However, it should be understood that such material is not produced according to GOST standards, but according to individual specifications of the plant.
Profile dimensions (waves)
The profile of the slate sheet depends on the height and pitch of the wave. According to GOST, sheets with two types of sections are produced - 40/150 and 54/200. In this case, the first digit of the fraction (numerator) indicates the height of the wave, and the second (denominator) indicates its step (in mm).
Wave height is the distance measured between the highest and lowest point of a slate wave. In the fraction denoting the type of section, the height of the ordinary wave is indicated (40 mm and 54 mm). There are also extreme waves.
On one side of the sheet, the wave is called overlapping, and on the other, it is called overlapping. The height of the overlapping and ordinary waves is the same. The height of the overlapped wave is somewhat less.
For slate sheets with a section of 40/150, the height of the ordinary and overlapping waves is 40 mm, the height of the overlapped wave is 32 mm. Section 54/200 implies the following heights: for ordinary and overlapping waves - 54 mm, for the overlapped wave - 45 mm.
The second digit of the fraction (150 mm and 200 mm) - the wave pitch - indicates the distance between the tops of two adjacent waves.
Sheet thickness
The thickness of the slate is directly dependent on its size and profile size. Sheets with profile 40/150 are produced with a thickness of 5.8 mm.
A larger cross section will require an increase in thickness, otherwise the material will not be able to support its own weight and will crumble during installation or during the initial stage of operation. Therefore, sheets with profile 54/200 have a thickness of 6 mm or 7.5 mm.
Sheet sizes
In accordance with the current GOST, the dimensions of the sheets of wave slate are regulated as follows: length - 1750 mm, width - 1125 mm (slate with 6 waves), 980 mm (slate with 7 waves), 1130 mm (slate with 8 waves).
At the same time, many manufacturers produce slate with non-standard sizes. When ordering, it is advisable to clarify this point in order to correctly calculate the amount of material.
Sheet weight
Since the installation of slate is carried out manually, the weight of a single sheet is of no small importance when buying. This parameter depends on the number of waves, profile size, material thickness.
Weight of standard slate sheets (made according to GOST):
- Type 40/150, 7 waves (dimensions 1750x1130x5.8 mm) - 23.2 kg;
- Type 40/150, 8 waves (dimensions 1750x1130x5.8 mm) - 26.1 kg;
- Type 54/200, 8 waves (dimensions 1750x1130x6 mm) - 26 kg;
- Type 54/200, 8 waves (dimensions 1750x1130x7.5 mm) - 35 kg.
Coating color
The usual color of slate is white-gray. However, thanks to the use of coloring agents, the color palette of slate has expanded significantly. Factories produce sheets of red, green, blue, brown, yellow, brick and other colors.
Slate staining can be done in two ways:
- Coloring pigments are introduced into the composition of the liquid asbestos mass at the stage of slate production. The color is as stable as possible, as it penetrates the entire thickness of the material. However, coloring of slate in bulk is carried out only according to the manufacturer's own specifications and does not meet the requirements of the current GOST.
- Pigmented compositions (acrylic, alkyd and polymer paints) paint ready-made slate sheets. Such decoration is practiced by factories producing colored slate according to GOST. Also, paints can be used to cover slate with your own hands - to improve its decorative qualities, update its appearance and extend its service life.
Regardless of the staining method, the color finish of slate increases its frost resistance, reduces water absorption, and protects against damage. On average, the durability of colored slate, compared with a gray counterpart, is 1.5 times higher.
Physical and mechanical characteristics
The physical and mechanical features of slate make it possible to use it in difficult conditions, on the roofs of residential and industrial buildings.
The main characteristics are:
- Concentrated die load - not less than 150 kgf (for 40/150 - for any thickness and 54/200 - for a thickness of 6 mm) or not less than 200 kgf (type 54/200, thickness 7.7 mm). In other words, slate can easily withstand the weight of objects of 150 or 200 kg. On the slate roof, you can move freely during installation, at the stage of operation and repair. Significant snow loads are also not terrible for her.
- Density - observed at a level of at least 1.6 g / cm3 - for type 40/150; not less than 1.65 g/cm3 - for type 54/200 6 mm thick; not less than 1.7 g/cm3 - for type 54/200 7.5 mm thick. The higher the density, the greater the strength of the slate and its weight.
- Bending strength - 16 MPa - for type 40/150; 16.5 MPa - for type 54/200 6 mm thick; 19 MPa - for type 54/200 with a thickness of 7.5 mm.
- Residual strength - remains at the level of 90%. This is the strength level of the destroyed slate.
- Water resistant - 24 hours.
- Frost resistance - 25 cycles - for slate type 54/200 6 mm thick and type 40/150, 50 cycles - for slate type 54/200 7.5 mm thick. These figures indicate the number of freeze and thaw cycles that do not lead to visible destruction of the slate.
See the picture below for more details:
Advantages and disadvantages of wave slate
To better understand the properties of wave slate, let's combine all its advantages in one list. The positive aspects of this material can be considered:
- Durability- on average, the operation of a slate roof lasts 30-50 years. Coloring further extends this period.
- fire resistance- slate does not burn, does not spread flame, therefore, according to GOST 30244, it is characterized as a non-combustible material.
- Weather resistance. Slate does not rot, does not deteriorate under the influence of precipitation, withstands significant wind loads.
- Low thermal conductivity. Slate retains heat well in the room during the cold season, so when installing a roof, you can save on some of the insulation layers. At the same time, in summer, slate, on the contrary, isolates the room from intense solar radiation. It heats up a little, unlike, for example, metal tiles or corrugated board.
- sound absorbing properties. Asbestos-cement sheets tend to absorb sounds, so the sound of falling rain or hail will be little heard in a house with a slate roof.
- Decorative. The choice of colored wave slate allows you to get a roof with high decorative properties. However, gray traditional slate also fits well into the architecture of modern cities and towns.
- Easy installation. A roofer covering a roof with slate does not have to be highly qualified. The scheme and technology of laying corrugated sheets is very simple and does not require specialized skills and tools. You can cut slate with almost any cutting tool used in everyday life. For example, a hacksaw, grinder, circular saw.
- The use of a sparse crate. Slate is a hard material that does not bend or change shape. Therefore, the roof sheathing under it can be mounted with a sufficiently large step, optimally - 0.75 m.
- Small cost. The cost of erecting a roof from slate is, as a rule, 2-3 times lower than from other materials. The low price of slate sheets, together with the low cost of their installation, allows you to get a high-quality roof without significant damage to the family budget.
Of course, slate, despite all its positive qualities, is not an ideal material and has its drawbacks.
Thus, some of the negative properties of slate are corrected with the help of proper operation and special care. Other shortcomings are more far-fetched, and still others do not have a significant impact on the long-term operation of the roof.
Taking into account the indisputable advantages of the material against the background of minor shortcomings, we can conclude that slate, despite the emergence of more modern analogues, continues to be a competitive and promising roofing with a wide range of uses.
Colored
Eight-wave slate* is a standard roofing sheet that has been used in construction in our country for more than 60 years. It has symmetrical edges requiring overlapping sheets on the base SP 17.13330.2011 Roofs. Updated edition of SNiP II-26-76. The wave height of such a profile is 40 mm and the wave pitch is 150 mm. The standard thickness is - 4.7; 5.2; 5.8 mm.
Lightweight eight-wave slate sheet 4.7 thick; 5.2 mm lighter than 5.8 mm thick sheet, which reduces the cost of slate and simplifies installation. At the same time, slate sheets with a reduced thickness retain all the key properties of this product, and also surpass other roofing materials in strength.
Eight-wave sheets are made on modern equipment, which provides a smooth surface and accurate geometric dimensions.
* Profile 40/150 (CB)
Specifications and dimensions of 8-wave slate
Range
The 8 wave slate is available in regular gray unpainted, as well as in the standard colors of indigo (blue), green, chocolate, orange and red. Painted in the factory, slate is more resistant to the negative effects of the weather. The coating without loss of its properties lasts up to 6-7 years.Application
A thicker sheet is used in regions with high snow and wind loads. A thinner sheet should be used in temperate zones.Sheets of eight-wave slate are mainly used in residential low-rise construction to cover the roofs of private and apartment buildings, cottages, townhouses, non-residential buildings (arbors, garages, etc.).
