Sheet roofing materials
Sheet roofing materials are quite diverse. These include the widespread asbestos cement sheets( slate), and wood-fiber cement slabs, and modern sheet roofing materials such as ondura and ondulin.
The starting material for them is a conventional or colored cement with the addition of asbestos fibers.
Qualitative characteristics of asbestos-cement sheets are durability, strength, waterproofness, fire resistance and high resistance to alkali.
Flat asbestos-cement sheets are produced from unpainted raw materials, in which a pigment is added. They can be light( not pressed), heavier( pressed), smooth, colored enamel and embossed. Asbestos-cement sheets are characterized by lightness, fire resistance, durability, water resistance, alkali resistance. Asbestos fibers contribute to the additional strength of the product.
Flat asbestos-cement sheets can have a length of 1200, 2500, 3200, 3600 mm, thickness - 4, 5, 8, 10, 12 mm, width - 800, 1200, 1500 mm.
When constructing a roof, the sheets are spread over a continuous lath diagonally overlapping - this is the so-called Russian way.
If you need to cover the slopes and edges, the sheets can be cut into pieces of the right size. To roof was more reliable, often under asbestos-cement sheets are laid only or parchment.
Wavy asbestos-cement sheets of ordinary profile can be ordinary, having the following parameters: weight - 8.5 kg, thickness - 5.5 mm, area - 1200 x 686 mm, or reinforced with thickness - 8 mm, area 1000 x 2800, wave height- 50 mm. Wavy sheets in comparison with flat ones have much greater strength due to the stiffness caused by their cross section.
The main features of installation of sheet roofing materials
When constructing a roof covered with such a material, the roofing system becomes an optional device for continuous crating.
The standard size of corrugated sheets with a thickness of 5.5 mm is 1200 x 680 mm.
The weight of ordinary slate is 8.5 kg. In addition to it, it is also produced reinforced, the products from which are even more durable and durable.
The industry, in addition to sheets, produces grooved elements for covering the ribs and roof ridge.
There is also a slate based on plastics. Differences of the roof made from it - lightness and a variety of colors.
Pressed plates have great strength due to their corrugated undulating surface.
The slab dimensions are 1000 x 1095 mm, its weight is 11.5 kg. In the production process, it is painted in standard colors: black, brown, red, gray.
Roofing materials ondulin
Ondulin is a roofing covering in the form of corrugated sheets.
This material is durable, durable, economical and differs relatively little labor.
Parameters of one sheet: weight - 5.7 kg, width - 950 mm, length - 2000 mm. The lifespan of the ondulin is long enough - 50 years.
One of the main advantages of this material is ecological purity, because it does not contain asbestos, and resistance to negative environmental influences.
Roofing materials ondura
Ondura is a sheet material used in the manufacture of bitumen and cellulose board. On the outside, the sheets of ondura are covered with a layer of special paint. At installation it is required to lay an additional waterproofing layer from roll materials. The lifespan of the idur, in comparison with the ordinary slate, is less, and the artistic and decorative indices are much higher.
They are made of polycarbonate or poly vinyl chloride. This material is characterized by rather high decorative properties, but its service life is relatively small - 10-15 years.
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