Repair the roof of the house in the home. Roof from asbestos-cement sheets
To attach asbestos-cement sheets to the crate, they need to drill with 3-4 holes for nails or screws so that they are located on the crest of the wave, and their diameter is 2-3 mm larger than the diameter of the screw ornail.
The execution of roofing works from asbestos-cement sheets starts from the cornice row, controlling the correctness of its installation by a cord-mooring cord. Sheets are placed in horizontal rows from the bottom up. Neighboring sheets should be spliced into a whole wave or half of it. Sheets of the second row are 100-150 mm per sheet of the first row( the amount of admission is due to the slope of the roof: the larger it is, the less is the admission).
The device of a roof from asbestos-cement sheets
For convenience of work, before beginning them, along the cornice board, two anti-wind staples are fastened to each sheet so that, with their bent ends, they firmly hold the asbestos-cement sheet over the crests of the wave. After the first row is laid, pencil or chalk is marked with a lap line, then the second row is laid.
Asbestos cement is fastened to the base with lengths of 70-90 mm with galvanized nails or screws, under the hats of which there are washers made of rubber, galvanized steel or made of two layers of ruberoid gasket.
It is necessary to drive nails into the crate from above through an as-unsteel cement sheet, otherwise it may form chips and cracks.
After completion of the roofing work of the nail head and all available suspicious cracks should be covered with surfaced putty.
Methods for laying asbestos-cement sheets
Roofing from asbestos-cement sheets is laid in two ways: strictly one above the other or bypassing, shifting them aside in each overlying row.
The simplest and most reliable is the first method, because when the sheets stack one above the other without displacement, one sheet at the edges overlaps the four adjacent ones.
As a result - the formation of cracks, through which moisture can penetrate. To avoid this, the corners of the sheets must first be cut off.
The roof device has such a final stage - covering the ridge, to which a special ridge bar with a rounded upper edge, section 100 x 60 mm, is nailed. Then the bar is closed with strips of rolled material, after which ready-made asbestos-cement parts KPO-1 and KPO-2 are laid on it. The first part is laid in the side of the pediment with a wide bell. For the nails make holes( two - on the axis of the convex part, two - on the flat lapel).On a flat lapel, the holes are made in such a way that they pass through the crests of the waves of asbestos-cement sheets.
Finished details for the ridge can be replaced by two cornered boards mounted on top of the asbestos cement sheets and nailed to them. It is important to remember that it is more convenient to fasten the pediment boards and sew the cornices before the roofing works begin.
In this case, the exposed lath will perform the functions of the ladder, and the work can be done from below and from above.
