Slate as a coating has been used since ancient times. The reason for this is its advantages: strength, durability, fire safety and low price. But he, like any other type of roof during operation, is susceptible to wear, and periodically needs repair.
With a complete replacement of the roofing material, the previous coating is removed. The rafter system is replaced if necessary. Installation of asbestos -cement sheets begins after vapor barrier and waterproofing and roof insulation were carried out. By clicking on the link, vapor barrier and waterproofing, you can familiarize yourself with the materials that use their types, functions and properties for this.
Lay the sheets you need to start from the lower corner of the roof slope. In this case, the direction of the winds of this area is taken into account. Shifer’s overlap is made from the leeward side. Roofing sheets when laying should find one extreme wave on the previous sheet. The laying of the next row begins after the first was completed with the vestibule of at least 10 cm to the previous row. In the event that the slope of the roof is less than 25 degrees, the wage is increased.
The smaller the roof slopes, the greater the wage (up to 20 cm). On the roofs of the minimum slope of the joints of the sheets are sealed with silicone sealants. For a roof from this material, there are special slate nails. In order not to crack asbestos -cement material, at first holes are drilled in the slate, and then nails are clogged. The hole for nails should be larger than the diameter of the slate nail. In the places of adjustment of the slate to the chimney, waterproofing of the joints is produced.