Modern roofing materials are beautiful and durable, no one will argue. However, good old slate also does not sit on store shelves. After all, it is very cheap, it is not afraid of fire, and others technical specifications has good ones.

For roofing, only corrugated slate is used, the sheet dimensions of which allow covering almost any roof with a minimum of waste. The main thing is that the slope of its slope is at least 12 degrees. It is the sizes of 5, 6, 7, 8 wave slate that will be discussed in this article.

Slate sheet sizes 6, 7, 8 wave.

There are four main types of asbestos-cement roofing sheets:

1. Flat;
2. 6-wave;
3. 7-wave;
4. 8-wave.

Flat products are used in the construction of partitions and roofs, while wave products are used exclusively for roofing material. Their production technology and composition are the same; they differ only in the 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 asbestos-cement sheet ranges from 38 to 115 kg.

Table of sizes of 6, 7, 8 mm slate and its price:

When calculating the amount of material in question required for a roof, you should focus not on its general dimensions in the markings, but on the working ones. Each sheet wave sheet superimposed on the previous one with an overlapping offset. Therefore, cutting and displacement will require about 15–20% of the area of ​​the roof to be covered.

Slate 5 wave sizes 1 sheet.

5-wavy slate or Europrofile appeared on the market relatively recently; its production was launched only in Ukraine in the city of Balakleya.

With parameters identical to 8-wave slate, Europrofile has a unique sheet geometry. Instead of standard waves, this model features flat depressions, which improves performance characteristics.

The parameters of 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 slate over overlaps (1-2 waves on both sides), a small part of the material is lost. The same can be said about 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. Total area standard sheet with 6 waves - 1.97 m2. At the same time usable area– 1.41 m2. Thus, the overlaps take up 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 produced not according to GOST standards, but according to individual plant specifications.

Detailed dimensional characteristics of corrugated slate brands - table.

Options	Nominal size of profile sheets		Maximum 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.
private 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 slate sheet. By subtracting one tenth for the 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 for the overlap. Let's round - that's the number of rows. Just in case, always buy a couple of sheets more than you calculated, as there is a possibility that several sheets will crack during installation.

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 this profile is 40 mm and the wave pitch is 150 mm. Standard thickness is - 4.7; 5.2; 5.8 mm.

Lightweight eight-wave slate sheet with a thickness of 4.7; 5.2 mm is lighter than a 5.8 mm thick sheet, which reduces the cost of slate and simplifies installation. At the same time, slate sheets with reduced thickness retain all the key properties of this product, and are also superior in strength to other roofing materials.

Eight-wave sheets are produced at modern equipment, which provides a smooth surface and precise geometric dimensions.

* Profile 40/150 (NE)

Technical characteristics and dimensions of 8-wave slate

Assortment

8-wave slate is produced as usual gray in an undyed version and in standard colors: indigo (blue), green, chocolate, orange and red. Factory painted slate is more resistant to negative impacts weather. The coating lasts up to 6-7 years without losing its properties.

Application

Thicker sheets are used in regions with high snow and wind loads. Thinner sheets should be used in temperate climate zones.
Sheets of eight-wave slate are mainly used in residential low-rise construction for covering private and apartment buildings, cottages, townhouses, non-residential buildings(gazebos, garages, etc.).

Bauff offers to purchase wave slate for roofing from manufacturers at an affordable price. Certified slate has the shape of rectangular sheets, pierced by 8 deep waves. The finished slate has a thickness of 5.2-5.8 mm and fully corresponds internal GOSTs and international quality standards. Delivery of wave slate throughout Moscow and the region is carried out by the seller’s transport within 24 hours from the date of order confirmation. Transportation of sheets to other regions is carried out by Bauff partner transport companies.

Advantages of wave slate

Roofing profiled slate has the following advantages:

1. Resistance to sudden changes temperature and prolonged negative mercury levels. It is successfully used in the northern regions.
2. No fear high humidity air and precipitation (snow, rain).
3. Does not fade or deteriorate under direct influence sun rays, not afraid of ultraviolet radiation.
4. Ease of implementation installation work. Slate is easy to install thanks to the wave connection.
5. Versatility of sizes. Profiled sheets have standard size and 98% of usable area, which allows installation with their help roofing structures of any complexity.
6. Strength, reliability and durability. Properly installed slate will last at least 70 years!
7. Favorable price profile products 5-10% cheaper than the cost of other roofing building materials.

Areas of application of wave slate

Wave multi-colored sheets received wide application in civil, industrial and technical construction. Roofs are covered with such slate, and wave products are used for laying out premises. technical purposes. Various fencing structures are mounted with slate and other uses are found for profiled slate.

Order and purchase wholesale quantities of wave roofing products from the manufacturer with delivery to favorable conditions at a convenient time on the company’s website or by contact phone numbers.

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Not so long ago, the most used, durable and prestigious material for roofing buildings for various purposes was considered asbestos-cement slate. It was difficult to acquire, industry could not keep up with the increase in demand, socialist planning, in principle, could not properly build relations between consumers and producers.

The technical parameters of slate were prescribed in the provisions of GOST 30340-95. Today, in many developed countries, it is prohibited for use, the reason is the presence of carcinogenic substances that provoke the development of oncological tumors. We will look at how things really stand with this terrible disease a little below.

Currently, industrial companies in Russia use completely safe material chrysotile cement to produce the traditional range of corrugated slate; the technical conditions of modern corrugated slate meet the provisions of GOST 30340-2012.

GOST: Chrysotile cement corrugated sheets. Technical conditions. GOST 30340-2012.

In this article we will look at the sizes of 8-wave slate old and new state standard.

In our country, to date, according to various estimates, approximately 50% of all buildings are covered with slate. As a roofing material, sewer pipes and other industrial products, asbestos has been used for more than a hundred years; there are more than 3 thousand items in the world various materials, containing different types asbestos.

In 2005, the EU passed a regulation banning the use of asbestos in the manufacture of roofing materials. The reason is that carcinogenic properties negatively affect human health.

According to independent researchers, the actual situation differs significantly from that cited by the European Commission when justifying the decision to ban the use of asbestos. The risk of developing cancer increases only in people directly involved in the production and extraction of ore and who do not use the means personal protection respiratory organs.

In practice, it has been proven that dust provokes the development of asbestosis (pulmonary fibrosis) only after 10–20 years of continuous work in production without observing basic safety regulations. This is exceptional occupational disease, ordinary users asbestos-cement slate is not at risk of getting sick. And in modern enterprises that have high-quality equipment and monitor safety precautions, after thorough medical examinations of employees, no pathologies are detected in their lungs.

Strengths and weaknesses of 8-wave slate

It is unproductive to consider the performance parameters of roofing materials separately. Each of them has its own characteristics associated with technology and material of manufacture, this is completely different coatings both in physical and chemical parameters. What is considered a disadvantage for some is considered a disadvantage for others. an undeniable advantage. Given this situation, consider operational properties eight-wave slate in comparison with other widely used roofing coverings, such comparisons will help you find out objective, and not advertising, characteristics.

Operational Parameter	Comparative Brief Description
	Among all roofing coverings, only rolled ones are cheaper. flat roofs. But they are used only for a limited number of building projects; most individual residential buildings have pitched roofs. You need to understand that when comparing costs, we mean average price categories roofing coverings. Each type has a wide range of prices from the cheapest economy class to very expensive premium products. For example, high-quality flexible bitumen shingles may cost more than some types of piece tiles, although at average prices the latter is significantly more expensive.
	Asbestos is used to make thermal insulation in various electrical appliances, withstands heating up to +1000C°, does not support open fire. Previously recommended by fire authorities for the construction of fire barriers. Accordingly, the slate does not burn. But this does not mean that after a fire the sheets will remain intact. Cement is used in production; when heated, it cracks, corrugated slate collapses and reuse unsuitable. Among roofing coverings, all materials containing bitumen burn. You should remember this and not pay attention to the advertising statements of some manufacturers that soft tiles excellent resistance to fire.
	This indicator plays a role when choosing a method for protecting roofs from lightning. If for metal roofing materials the presence of a lightning rod is specified in the requirements of building codes and regulations, then for slate there is no such requirement. When dry, it is a 100% insulator; when wet, slate conducts electricity slightly.
	According to this indicator, wave slate is inferior to all roofing materials, except for some types of piece tiles. One square meter a sheet of 8-wave slate weighs more than 30 kg, which is quite a lot for rafter systems. Weight roofing must be taken into account during the design of roofs; in most cases, data on the increase in the weight of the building are taken into account when calculating the foundations.
	Slate brittle material, does not withstand impact loads, after a medium-sized hail the roof has to be completely replaced. In this parameter, it is inferior to all currently used roofing coverings.
	Working with slate is difficult; it cuts poorly, cracks easily, and requires increased care during installation. In addition, 8-wave slate is very heavy; installation requires great physical effort, which increases the risk of injury to roofers. In terms of manufacturability, slate ranks last among other materials.
	On average slate roofs can be used for about fifty years, of course, if not mechanical damage because of the hail. The service life is quite competitive even among the most modern and very expensive roofing coverings.

As for design characteristics, there cannot be objective data; each consumer makes an independent decision taking into account his personal tastes and preferences. Moreover, today's manufacturers have learned to produce wave slate with various color schemes.

Dimensions of 8-wave slate according to the provisions of GOST 30340-95

Today, these standards are considered valid, although in practice they are used quite rarely. As mentioned above, the majority of domestic manufacturers have switched to safer raw materials and manufacture goods according to new technical specifications. We will consider the data of this state standard only due to the fact that you can still find asbestos-cement slate made according to old standards, and you need to know its technical characteristics.

Shape and main parameters of old slate

Two types of cross-section are allowed, the difference in height and wave pitch. Slate is designated by the numbers 40/150 and 54/200. Here the numerator indicates the height of the ridge, and the denominator its pitch. At the same time, the nominal width of the sheet with 8 ridges is 1130 mm, the maximum variation in thickness is no more than a millimeter on the positive side and ≤ 0.3 mm on the negative side.

The dimensions of additional roofing elements are also regulated: ridge overlapping and overlapping part, simplified ridge part partially overlapping and overlapping shaped part. The tray and isosceles corner parts have their own standards.

Prices for different types of slate

General requirements for technical parameters of 8-wave asbestos cement slate

In plan, sheets and tray elements must be rectangular, permissible deviation in length and width ≤ 15 mm, deviation from straightness of slate edges ≤ 10 mm. By modern standards, these are very large tolerance fields; now the tolerances of roofing materials are measured in tenths of a millimeter.

Slate sheets have fairly large tolerances for dimensional deviations

The surface and edges of the coating must not have chips, holes or through cracks. The planes can be painted or have a natural shade.

Single scuffs ≤ 100 mm long and individual nicks ≤ 15 mm in the transverse direction are allowed. The total length of chips on one edge cannot exceed 60 mm. In this case, the total number of small deviations on one wave slate cannot exceed three, and the number of low-quality sheets cannot be more than 30% of the supplied roofing lot. The data of physical and mechanical values ​​are normalized:

• bending strength 1.6–1.7 MPa;
• density 1.6–1.7 g/cm3;
• volumetric water resistance ≥ 24 hours;
• frost resistance more than 50 cycles with residual strength ≥ 90%.

When purchasing, consumers should pay attention to compliance with labeling standards. Responsible and famous manufacturers always indicate your contact information and full information about the product. On the front surface of the slate, the company's trademark or its name, product batch number, thickness and type of wave slate profile are written. At the same time, all letters and numbers must be clearly visible and eliminate the risk of challenging the contents of the marking in the event of any quality claims.

Parameters of 8-wave slate according to the provisions of GOST 30340-2012

These are relatively new chrysotile cement materials; in our country today they are used for the manufacture of roofs and shaped parts used to cover structures for various purposes. Chrysotile is a well-known mineral of the silicate class for a long time, has a fibrous structure, is not afraid of the effects of aggressive chemical compounds, does not dissolve in water, and is chemically inert. Recognized as the safest type of asbestos for health.

When cement is added to it, it is obtained - the material for the manufacture of modern corrugated slate sheets.

According to the normative act on geometry cross section There are two types of coatings: 40/150 and 51/177, the edges are symmetrical and asymmetrical.

Name of controlled sizes of 8-wave slate	Slate parameters 40/150mm	Fields permissible deviations slate 40/150 mm	Slate parameters 51/177mm	Slate tolerance margins 51/177 mm
Slate length in millimeters	1750	±15	625 – 5000	±10
Slate width in millimeters	1130	+10	Not produced	Not produced
Sheet thickness taking into account permissible deviations in millimeters	4,7	±0.20 1,0…-0,3	5,20	±0.30

The standard regulates the sizes of the remaining sheets depending on the number of waves. Additionally, the height and width of the edge of the ordinary, overlapping and overlapped wave are controlled. This is done to minimize the size of gaps on the roof.