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If not so long ago, slate was considered the traditional and most sought-after roofing material, today it is a rather rare roofing option for new buildings. Asbestos-cement slate is found infrequently and mainly in utility rooms, garages and other outbuildings. At new facilities, it was replaced by modern, more reliable, beautiful and durable roofing materials. But old buildings are still in most cases covered with asbestos-cement slate. Such buildings have been in operation for many years, in connection with this there is a need for a complete replacement of the roof.
Before making the final decision on dismantling the old slate roof, you should weigh the pros and cons. The fact is that replacing the roof is a rather expensive construction event. During its execution, unforeseen problems may appear, which further increase the estimated cost of repairs. When should the old slate be dismantled?
- Critical physical wear. Externally, the slate sheets do not have significant damage and look quite normal, but due to natural aging, the strength of the slate decreases significantly, it becomes very brittle, in some cases the sheets are easily broken off by hand. Such a coating can receive significant damage at any time during heavy rain. As a result, water gets not only into the attic, but also into the living rooms. You will have to repair the decoration of the ceilings and walls of the interior, and this greatly increases the cost of repairs. Conclusion - you should not expect big problems to appear, it is much more profitable to replace the old slate in a timely manner.
- Lots of mechanical damage. This refers to non-through holes in the coating after hail - in such cases, the replacement of slate is required. There are situations when technological errors are made during the installation of the truss system. The bearing units of the structure do not have sufficient strength and stability; during the increase in loads, they change their geometry and spatial position. As a result, large cracks appear on the slate sheets. If they are located on the upper ridges, there are no big problems, leaks are almost invisible and do not constitute problems for attic spaces. But cracks can also be located on the lower waves, and here, during the rain, a lot of water flows, it will definitely fall on the rafter system. As practice shows, it is useless to repair such cracks. There is only one way out - depending on the degree of damage, change several sheets of slate or the entire roof.
- Unsatisfactory appearance. Mosses and lichens can grow on slate roofs, which significantly worsens the appearance of the building. There are ways to mechanically clean the coating using electric circular grinders, but experienced builders strongly do not recommend doing such work. Firstly, it is very difficult and long, and the effect is unpredictable. Secondly, there are risks of damage to the roofing.
Depending on the condition of the slate and the qualifications of the craftsmen, the old coating can be reused or it has to be taken to a landfill for construction waste disposal. For transportation, you should approximately know the total weight, this value is determined taking into account the mass of a square meter of slate during disassembly.
Prices for various types of slate
How to determine the weight of slate 1 m2 during disassembly
The technical parameters of slate sheets depend on the specific type and production technology of the material. Given the geometric shape of the sheet, two types are distinguished.
wave slate
It is used as a roofing and facing material, has a rectangular shape. The number of waves is from five to eight, their height and thickness vary.
Wave slate is installed on slopes with a slope of at least 12 °. The material is made on automatic lines from a special mass, depending on the features of the molds, it can have a different number of waves. The more waves - the higher the bending strength parameters, this allows you to reduce the thickness of the slate while maintaining the original technical data. There are 5, 6, 7 and 8 wave asbestos cement slate sheets. At present, five- and six-wave slates are almost not produced, most companies have switched to the production of eight-wave slate, it is rare to find seven-wave slate.
Technical characteristics of standard brands of slate
Slate has regulated marking requirements, inscriptions are applied to the extreme wave from the front side. For example, marking 1750 × 1130 × 5.2 mm, 40/150 means that the sheet has a length of 1750 mm, a width of 1130 mm and a thickness of 5.2 mm. Wave height 40 mm, distance between crests 150 mm.
Table. Coating weight depending on the type of slate.
| Slate brand | Standard weight per sheet | Weight per square meter of coating |
|---|---|---|
| 7-wave 1750 × 1130 × 5.2 mm, 40/150 ordinary (VO) | 18.5 kg | ≈9.5 kg |
| 7-wave 1750×1130×5.8 mm, 40/150 reinforced (VU) | 23 kg | ≈11.8 kg |
| 8-wave 1750 × 1130 × 5.8 mm, 40/150 ordinary (VO) | 26 kg | ≈13.3 kg |
| 8-wave 1750×1130×6.0 mm, 54/200, unified (UV) | 30 kg | ≈15.1 kg |
| 8-wave 1750×1130×7.5 mm, 54/200, reinforced (VU) | 35 kg | ≈17.9 kg |
Experts note that the functionality of the roofing will depend on such factors as the characteristics of the base, the structure of the roof structure, the presence of heat and vapor barrier, and the type of roofing material. All described parts must comply with the technical specifications. When designing a rafter system, the coating of which is made of asbestos-cement sheets, one should take into account such an important parameter as the weight of the slate. It is the mass of this wave roofing product that our article will be devoted to.
Why you need to know the mass of slate roof
The coating is considered one of the main ones in the creation of roofs for household buildings, therefore, its choice must be approached with special responsibility. With the same overall dimensions, the weight of 1 sheet of the material in question will not be the same. This is especially important when designing a truss structure. But there is one important rule here: the thicker the asbestos-cement products are, the stronger they are. Consequently, with an increase in thickness, the weight of the 7 wave slate also increases.
When choosing such materials, it is possible to make a roof with a particularly durable coating, but this option will put a significant load on the frame. In this regard, when designing truss structures, the following indicators must be taken into account:
1. How much does a slate sheet weigh.
2. Maximum loads from the effects of wind and snow lying on the surface.
3. Loads during roof operation. Here, the weight of building structures and people who carry out installation work are taken into account.
When using a thickened wavy version for the manufacture of a truss structure, a thick wooden beam is used, as well as thick boards, the sheathing step is reduced. In such a case, the cost of installing the roof increases, and its weight also increases. In this regard, at the design stage, it is necessary to calculate the foundation so that it can withstand all the loads. One of the main values that are taken into account is the mass of slate 8 wave or other materials for mounting the coating.
At the design stage of the roof, you need to decide on the method of laying asbestos-cement products. The amount of horizontal and vertical overlap of the sheets will depend on the slope of the roof, wind and snow load. Sloping roof structures are subject to increased requirements for strength. Sheets should be laid with increased overlaps on a reinforced crate. During the calculations, the weight of 1 m2 of slate is determined, and then the mass of the entire coating.
As for the financial costs of roofing, asbestos-cement products are considered one of the cheapest. When building a reinforced roof, the cost of the truss structure will exceed the cost of the cover. In some cases, it is necessary to know the weight of flat slate, and especially if such material is used to pad the ceiling in garages, sheds or other auxiliary structures.
What are they made from
The material in question is made from such raw materials as Portland cement, non-combustible substance asbestos and water. The proportion of these components is 4 to 84 to 11. In the general composition of the mixture, asbestos-cement fibers perform the function of reinforcement. This feature makes the sheets resistant to tensile forces and other mechanical loads. At the moment, not every manufacturer adheres to the requirements of state standards, so the strength indicators of a particular product will depend not only on the thickness, but also on the size of the asbestos fibers, the fraction of cement particles.
flat slate
Asbestos-cement products are supplied to the construction market in the form of flat and wavy, and the latter can have from 5 to 8 ridges. The thickness of materials with a flat surface can range from 5 to 40 millimeters, but the most common options are sheets with a thickness of 6 and 8 mm, as well as 10 mm.
Each of the described options has its own scope of use:
1. Asbestos-cement sheets with a thickness of 6 millimeters are intended for subfloor installation and installation of interior partitions, they are also used for finishing the house from the facade. Experts recommend painting the surface of flat slate. A layer of paint will give the product a waterproofing effect.
2. Moisture-proof and fire-resistant asbestos-cement sheets of 8 mm thickness are used for exterior decoration of facades of brick buildings, frame houses and panel buildings. The main property of the described products is considered to be an increased service life.
3. Flat slate sheets with a thickness of 10 millimeters are used for finishing the facades of buildings, the roofing of country houses, as well as the installation of fences. In addition, similar material can be used for interior partitions.
As you know, the weight of a flat slate will depend on its overall dimensions. Let's take a closer look at this option:
- flat unpressed, with dimensions 3 * 1.2 * 0.012m weighs 83 kilograms;
- weight of a slate sheet with dimensions 3 * 1.5 * 0.01m - 87 kilograms;
- unpressed - with dimensions of 3 * 1.2 * 0.01 m have a mass of 78 kilograms;
- products 3 * 1.2 * 0.035 meters have a mass of 293 kilograms;
- a similar version with dimensions of 3 * 1.5 * 0.025 m has a mass of 250 kilograms;
- flat pressed 3 * 1.5 * 0.02 m - 180 kilograms.
Wavy slate
The materials under consideration can be divided into three types:
- VO - sheets with dimensions of 1.12 * 0.68 meters.
- VU - reinforced for industrial construction has dimensions of 2.8 * 1 meter.
- UV - unified wavy for civil engineering with dimensions of 1.75 * 1.13 meters.
For the roofing of country houses and master buildings, 7 and 8 wave are mainly used. Such products have the same size, they are distinguished only by the distance between the tops of the ridges. In the 7th wave sheet, the crest has a height of 54 millimeters, the distance between adjacent waves is 200 millimeters. In wave 8, the height of the crest is 40 millimeters, the distance between the tops of the waves is 150 millimeters. And now let's take a look at how much slate 7 wave weighs. The length of such a product is 1.75 meters, the width can have parameters of 0.98 or 1.13 meters, the thickness of the material is 5.2 or 5.8 mm. Consider specific examples:
- The weight of slate 7 wave with dimensions of 1.75 * 0.98 * 0.0052 meters is 18 kilograms;
- The same version with a thickness of 0.0058 meters weighs 21.8 kilograms;
- The weight of slate 1 of seven waves with dimensions of 1.75 * 1.13 * 0.0052 meters is 18.7 kilograms;
- A similar one - 0.0058 meters thick - weighs 23.2 kilograms.
How much does slate 8 wave weigh? The mass of the described products also depends on the overall dimensions:
- The weight of slate 8 waves 1.75 * 1.13 * 0.0052 meters is 20.6 kilograms;
- Similar - 0.0058 meters thick - 26.1 kilograms;
- The same ones with a thickness of 75 millimeters weigh 35 kilograms.
The weight of a particular product must be taken into account, and especially if the transportation of materials to the roof is carried out manually. One person can handle products weighing between 18-20 kilograms, but if the weight exceeds 25 kilograms, an assistant must be involved in the moving work.
Before starting roofing work, it is necessary to calculate the bearing load on the entire roof skeleton (truss system). And for this, it is imperative to calculate the weight of 8-wave slate and 7-wave slate, if this particular roofing material is used. It is important to remember that incorrect calculations threaten first with subsidence of the roof skeleton, and then with its destruction. In the article below, we will analyze in detail how much a slate sheet weighs for 8 and 7 waves (since it is these material options that are used in private construction).
Slate is a roofing material made from a mixture of asbestos, Portland cement, and water in a ratio of 85 x 11 x 4. The finished mass is pressed under high pressure and baked at high temperatures. It is believed that ordinary asbestos is harmful to humans, so today most manufacturers have switched to chrysotile asbestos.
All asbestos-cement roofing material is produced exclusively in two forms:
- Wave roofing (designed for roofs with a slope angle of 12 degrees or more);
- Flat roof (used on roofs with a slope angle of 25 degrees).
In turn, wavy slate can be divided into categories according to the type of profile:
- Roofing with VO marking. These are standard roofing sheets having the correct rectangular shape.
- Roof with VU marking. In this case, the material has a reinforced profile.
- HC Coating. Slate with a unified profile. It is he who in most cases is used in private construction.
Important: for the roofing of the roofs of residential buildings, slate 7 wave or 8 wave is mainly used, since their usable area is larger with the final roof overlap. Wave slate for 7 waves has slightly smaller dimensions than slate for 8 waves.
It is also worth noting that wave coverage is characterized by categorization by wave type. So, there are two types of material:
- With a profile of 40-150, where the height of the wave bend is 4 cm, and its length is 15 cm;
- With profile 54/200, where the height of the bend is 54 cm and its length is 20 cm.
Important: in this case, the thickness of one sheet of coating can vary in values of 5.2 mm, 5.8 mm, 6 mm and 7.5 mm. The thicker the finished ACL product, the higher its strength.
Calculating the mass of roofing material
Knowing the weight of 1 sheet of corrugated slate when working with it is necessary for many craftsmen for a number of reasons:
- The exact mass of the roofing and the entire pie, among other things, allows you to calculate the load on the roof rafters as accurately as possible, which means making them as strong as possible;
- Also, the weight of the slate sheet allows you to calculate the total load from the finished roof, which will eventually fall on the walls and foundation of the building;
- Knowing the total mass of the roofing material makes it possible to profitably dispose of funds for transporting material from the store to the house;
- In addition, knowing the weight of one layer of coating, the master can calculate the labor costs for the construction of the roof and, accordingly, their payment.
Important: sometimes it happens that the total mass of the finished asbestos-cement roof requires significant reinforcement of the rafters and foundation / walls. In this case, it may turn out that a more expensive, but lightweight roofing material will still be more economical than slate. This option should not be discounted in construction calculations.
Specifications
Wavy roofing material made of asbestos cement has the following technical parameters:
- Density - 1.6 g/cm3. This indicator is decisive for the strength of the roofing sheet.
- Bending strength - 16 MPa for sheets of seven- and eight-wave coverage.
- Impact viscosity - 1.5 kJ/m2. This indicator characterizes the ability of the coating to absorb extensive impact energy received from a sharp mechanical impact.
- Frost resistance. As a rule, a product manufactured in accordance with GOST can withstand up to 25 freezing / thawing cycles.
The benefits of slate
As for the advantages of slate roofing over other types of materials, they look like this:
- fire safety. The covering does not burn and does not melt at any temperatures. Maximum - cracks during prolonged burning.
- Resistant to temperature changes. In particular, slate can be used in the temperature range from -50 to +80 degrees.
- Low thermal conductivity. The wave material does not heat up even under the sun, which means that it will be cool in the heat in the house.
- Excellent noise reduction. The slate does not conduct the sound of rain into the house during a thunderstorm.
- Good maintainability. If necessary, only one cover sheet can be replaced.
- Long service life. The average is 30 years. And subject to high-quality installation and operating conditions - and all 50 years.
- Favorable material cost.
But slate, like other roofing materials, has its drawbacks. These are:
- Low resistance to point mechanical loads. With a strong point impact (impact), the coating may break through.
- tendency to overgrow moss on the shaded part of the roof. This is due to the ability of slate to accumulate and retain moisture in itself in the absence of proper sunlight.
- Loss of strength over time. So, if with just completed roofing work a person can calmly walk on the coating, then after 10-15 years the slate sheets will become more fragile and will no longer withstand such loads.
Weight, parameters and dimensions of slate for 7 waves
Such a slate has a weight depending on the thickness of one sheet of coating. On average, with a finished coating thickness of 5.2 mm, the weight of 7 wave slate will be 18.5 kg. Already with a layer thickness of 5.8 mm, its weight will be no more, no less - 23.2 kg. Useful coverage area (excluding overlaps) - 1.34 m2.
Slate weight for 8 waves
Here, the mass of the coating sheet also depends on its thickness. So, with a thickness of 5.8 mm, the weight of one layer will be 26.1 kg, and with its factory thickness of 7.5 mm, the weight of the layer will already be 35.2 kg.
Important: all parameters of corrugated slate are strictly regulated in accordance with GOST 30340-95 and the slightest deviations are unacceptable here.
Slate weight table by profile and type:
| Slate brand | Sheet size according to GOST | Profile type | Sheet weight kg | Sheet weight per kg/m2 |
| 7 waves | 1750x1130x5.2 mm | 40/150 | 18,5 | 9,487 |
| 7 waves | 1750x1130x5.8mm | 40/150 | 23,00 | 11,81 |
| 8 waves | 1750x1130x5.2 mm | 40/150 | 20,6 | 10,417 |
| 8 waves | 1750x1130x5.8mm | 40/150 | 26,00 | 13,35 |
| 8 waves | 1750x1130x6 mm | 54/200 | 26,00 | 13,35 |
| 8 waves | 1750x1130x7.5mm | 54/200 | 35,00 | 17,97 |
Important: it is worth remembering that when painting or priming (as well as during rain), the weight of one sheet of coating increases. Therefore, when calculating the total mass of the roof, it is always necessary to add 12% to the obtained value for moisture. Since a roof with a large number of sheets will have a weight of more than half a ton.
8-wave asbestos-cement slate is a popular roofing material. This is a durable and wear-resistant coating. Serves long and reliably. Currently, colored sheets of various scales are being produced. This adds variety to the architectural appearance of buildings with such roofs.
Asbestos cement is considered not quite an environmentally friendly product. It is recommended to use it for outdoor construction work. But even so, the scope of its use is quite wide.
What is an 8 wave slate? Pros and cons of coverage
Wave slate is a sheet of asbestos cement, has a wavy profile. It differs in the number of waves located along the width of the sheet. In this case, we are interested in a sheet with eight waves.
The composition and characteristics must meet the requirements of standards or specifications, otherwise it will be a defective product, devoid of its basic qualities. In the manufacture, certain dimensions of the wave must be maintained - its height and step.
The type of slate profile is regulated. One of them has a wave height of 40 mm, its pitch is 150 mm, denoted 40/150. The sizes of the second type are 54 and 200, denoted 54/200.
They also distinguish between the ordinary view - VO or reinforced - VU. The view defines the scope of the material. The ordinary view is used in private and low-rise construction. A unified view is used for the roof of industrial facilities.
What are the advantages of 8-wave slate:
- Frost-resistant, easily tolerates temperature changes.
- Not afraid of high humidity, rain and snow do not leave a mark on the coating.
- It tolerates sunlight well, its long exposure.
- Simple installation of the roof, you can do it yourself, having certain skills and ingenuity.
Like any item, slate has disadvantages, namely:
- The sheets are quite heavy, which makes it difficult to climb onto the roof.
- Fragile, requires care when transporting and stacking.
- Asbestos cement, from which slate is made, has a negative impact on humans.
- When cutting sheets, respiratory protective equipment must be used.
Slate production and composition
The main component of slate is a natural mineral - asbestos. When added to the composition of the cement mortar, the asbestos fibers are connected. It turns out a very hard material - asbestos cement. Its properties do not change when exposed to moisture, high and low temperatures, various physical activities.
Chrysotile asbestos is usually used. The mineral is fluffed, Portland cement and water, various additives are added to it. The working composition is pulp, in its preparation it is necessary to strictly follow the recipe in order to obtain good quality.
There are various installations for the production of slate. At the first stage, the pulp is kneaded. For this, bucket mixers are used. After thorough mixing, the mixture is removed, the liquid is allowed to drain and sent to the sheet-forming machine.
This is where the material is compressed. The duration of the process depends on the type of equipment and pressure. Typically, slate is pressed for 30 to 90 seconds. A continuous strip moves along a special conveyor, a special drum forms strips of a certain thickness.
Rotary shears cut the strips into sheets of the desired length. Next, the drums begin to work, forming a wave of slate. Their shape and dimensions determine the geometric characteristics of the finished sheets. Finished sheets move along the conveyor and go through the primary curing stage.
The next stage is the water saturation of the blanks. In a special pool, they are aged for a certain time and then sent to dry. This happens in a warehouse with a constant high temperature. This is where the material gains its final strength.
Currently, the production of colored slate is widespread. This increases the wear resistance of the material, gives it new qualities, a beautiful look to slate roofs. For this, phosphate and acrylic dyes are used.
Use in construction
Its main use is for roofing. Roofs in individual and low-rise housing construction. Longitudinal ridges serve as stiffeners and increase the bearing capacity of such a coating. This is facilitated by a thick sheet of at least 5 mm.
8-wave slate has convenient sheet sizes, which facilitates its installation. It should not be used for complex roof structures, which generates a lot of waste and the economic feasibility of the application will be low. It is not suitable for roofs with a slope of less than 12 0. Water will not drain well from such a coating, its humidity will increase.
Often use slate for fencing. Especially good are low fences made of wavy slate in personal plots. Painted in various colors, they bring a special flavor to the architecture of the garden. Another possibility of using slate is the enclosing structures of outbuildings.
Dimensions and weight of sheets of 8-wave slate. Specifications
Table 1 shows the dimensions of the 8-wave slate in accordance with GOST 30340-95. The overlapped wave has a height of 32 mm, the overlapping wave has a height of 43 mm. Marking includes alphabetic and numeric values. They indicate the brand of the sheet, the number of waves, the thickness.
Table 1. Technical characteristics of slate.
Due to the material from which it is made, slate has the following properties:
- Able to withstand a load of up to 200 kg, which allows you to walk on the roof during installation work and endure snow pressure.
- The density of the material ensures the strength of the coating.
- Water resistance reaches 24 hours, the use of special processing compounds extends this value.
- Frost resistance.
Installation of slate sheets on the roof. Ways of laying and fastening
A good solid roof is obtained if the base under it is done correctly. The truss system is used as a base. The sections of the rafters and racks must correspond to the expected loads.
Eight wave slates are laid apart. The sheets in adjacent rows are shifted, and the longitudinal joints do not match, it is not possible to connect 4 elements in one node. To provide this shift, individual sheets are cut lengthwise in half. They are used as the first extreme for odd rows. This is what causes the shift.
The sheets are joined with an overlap, trying to ensure that it is located on the leeward side. In the horizontal direction, the bands overlap by the magnitude of the wave. In the vertical direction, the overlap of sheets is required at least 200 mm.
Slate strips are attached to the crate using special slate nails or screws. They must have an oversized hat. A rubber gasket is placed under it. Holes for fasteners should be drilled with a drill, and not punched with nails, so as not to damage the sheets. Their fastening is carried out in the crest of the wave, in places of support on the crate, retreating from the edge of the sheet 120 mm.
The fastening of sheets of 8-wave slate in the transverse direction is carried out in the 2nd and 6th waves. In the longitudinal direction, the sheet rests on the crate in three places, which means that the sheet must be fixed at 6 points. It is better to drill holes for fastening the slate in advance according to the pre-applied markings. The hole diameter must be 3 mm larger than the fastener diameter.
Asbestos-cement slate has long been the most popular roofing. With the advent of new materials on the construction market, its consumption has decreased. It is currently being improved. A double-sided protective coating on an asbestos base made the slate environmentally friendly. The production of colored sheets has expanded the scope of use. Undoubtedly, this material remains the cheapest roofing in accordance with its performance characteristics.
Do you know what is the weight of slate 8 waves? But this information is very important for carrying out calculations, for example, of the truss system during the construction of buildings. As you guessed, our article will focus on such roofing material as slate, its types, technical characteristics and, in particular, its weight.
The word "" came to us from the German language, where roofing slate tiles, mined by splitting special rocks, used to be so called.
When equipping modern roofs, slate is practically not used, while the “name” is firmly fixed for asbestos-cement roofing materials of a wavy shape, as well as for sheets of alternative materials of a similar shape, and therefore is now quite common.
Characteristics of asbestos-cement wave slate
Such slate is one of the most used materials for roofing, and has been for decades. And this is not surprising, since it is practical, inexpensive and very convenient to fit.
Reinforced profile slate sheet parameters
Wave slate - weight 1 sq.m. the roof of which is 10-14kg (depending on the thickness of the product), is made from a mixture consisting of asbestos, Portland cement and water.
At the same time, thin asbestos fibers, which are evenly distributed in Portland cement, act as a reinforcing mesh, significantly increasing the impact strength and strength of the material.
The following types of wave slate modifications are produced:
- with a normal profile.
- With reinforced profile.
- With a unified profile.
Such sheets differ from each other in their size: the smallest of them are slate sheets with an ordinary profile, the largest with a reinforced profile.
As for the profile itself, here there are two types of sheets: 40/150, as well as 54/200, with the first number indicating the height of the wave, and the second - the step of the slate wave, indicated in mm.
According to GOST standards, the dimensions of wavy slate are determined as follows:
- their length is 1750 mm;
- width depending on the number of waves of the sheet can be:
- 980 mm for slate in 8 waves;
- 1125 mm for slate in 6 waves;
- 1130 mm for slate in 7 waves.
- thickness with profile 40/150 should be 5.8 mm, with profile 54/200 - 6 mm or 7.5 mm.
- the ordinary wave of the overlapping sheet, depending on the type of profile of the slate sheet, is produced with a height of 40 or 54 mm, while the overlapped one is 32 or 45 mm, respectively.
If you take a standard sheet slate 8 wave - its weight, depending on the thickness, will be from 23 to 26 kg.
Regarding the mechanical characteristics of this material, they are largely determined by such factors as:
- asbestos content;
- uniform placement in cement;
- fineness of grinding and others.
Advice! Remember that if you choose asbestos-cement slate as a roof for yourself, the weight of the sheet should serve as a guideline for choosing elements of the truss system of one thickness or another.
In order to improve durability, as well as decorative properties, slate is stained with phosphate or silicate paints using various kinds of pigments.
Often, wave asbestos-cement slate is painted in blue, red-brown, brick-red, yellow and other colors. Paint applied to slate protects the material from destruction, reduces its water-absorbing properties and increases frost resistance.
At the same time, the durability of slate sheets with a protective coating applied to them increases by 1.5-2 times.
Characteristics of flat asbestos-cement slate
Painted slates have great durability and attractive appearance Compared to wave slate, flat roofing sheet has somewhat similar properties, but still has some differences.
Such sheets are made in two ways: with and without pressing.
At the same time, the weight of flat slate produced with the use of pressing will be significantly higher than without it, however, the technical characteristics of the pressed sheet will be significantly higher.
For example, pressed slate is able to withstand at least 50 freezing cycles, while non-pressed sheet is almost 2 times less.
And even after the specified number of freezing cycles, the sheets remain strong enough, losing only about 10% in reliability from the initial indicator.
The rather high strength parameters of flat slate are impressive: depending on the manufacturer, the sheet is able to withstand a bending force of 20-50 MPa, and a compressive force of 90-130 MPa.
However, the main advantage of a flat finishing material is the versatility of its use.
Flat slate - the weight that allows the construction of a roof base without additional reinforcing elements, is applicable not only as a roof covering.
It can serve as both external and internal cladding of buildings, as partitions between rooms, and is in great demand in the agricultural and livestock sectors.
The versatility of the use of flat slate is connected not least with the high practicality and cheapness of the material.
Flat slate is resistant to aggressive environments, can be in contact with open soil for decades, is fireproof, and can be processed relatively well.
If we take into account the weight - flat slate is quite an acceptable material in this respect, both for roofing and for use in other areas.
Characteristics of wave bituminous slate
Flat slate: the weight of the coating allows the use of a roof truss system without additional reinforcements Wave bituminous euroslate or simply ondulin is a more modern product from a technical point of view than asbestos-cement slate sheet.
These types of coatings are completely different from each other, and from the common thing between them, perhaps, only the form, relatively low cost and purpose remained.
And how much does slate weigh with bitumen? With a sheet area of approximately 2 sq.m. its weight is only about 6.5 kg, which by the standards of roofing is simply a phenomenal result.
Most types of bituminous corrugated sheets are produced as follows:
- The fiber-bitumen mass, which includes bitumen, synthetic and vegetable fibers, dyes and plasticizers, is pressed at high temperatures. At the same time, the final density of the material is quite low, which to a greater extent determines the low weight of the slate sheet.
- Pressing is performed in several stages in a certain sequence, which results in a multilayer sheet structure, which gives the material high strength and resistance to mechanical stress. In this mixture, the bitumen serves as a waterproofing agent, while the organic matter stiffens the sheets.
- Impregnation with bitumen is also carried out in vacuum chambers in several stages, after which the sheets are painted.
Euroslate has a lot of advantages, including:
- Flexibility and ease of processing even. The material is quite easy to cut with a hand saw or jigsaw.
- Durability, which varies from 10 to 30 years for different manufacturers.
Advice! With all the advantages of wave bitumen slate (ondulin), it is still not recommended to use it in areas with a hot summer climate, since bitumen softens slightly under significant thermal loads, due to which the sheet temporarily loses its declared rigidity and, accordingly, overall strength.
According to the method of painting, bitumen sheets are divided into 2 types - glossy and matte. Matte sheets are painted with acrylic paint, while they are rough to the touch.
Glossy sheets look prettier and brighter due to the addition of silicone to the paint, which provides this very gloss and shine. Glossy coated sheets are more expensive and less capable of retaining snow and dirt.
In addition to the above options for slate, corrugated roofing sheets made from plastic (PVC) have recently appeared on the market. They are used so far mainly for sheltering gazebos, terraces, all kinds of sheds and greenhouses.
Plastic slate is quite light, easy to process and install, and has many other advantages. Nevertheless, this is a novelty for the construction market, so so far few people dare to build more serious roof structures from it.
So, we found out what slate is, learned about some of its varieties, found out thanks to what and how much a slate sheet of one type or another weighs.
We hope that this information will later help you to more clearly and quickly decide on the choice of slate for sheltering the roof of your own house.
