Roofing

September 8, 2007 on 2:09 am | In Business

Roofing is the top layer of a roof. Purpose of a roof consists in protecting buildings and constructions from influence of a rain, a snow, a wind, solar beams, etc.
The roof should be water-proof, cold-resistant, not blown and enough strong to resist to atmospheric loadings and mechanical influence at its repair and clearing of a snow.
The roof consists of following elements: inclined planes (slopes); inclined edges, making crossing of slopes; horizontal edges, too under formation crossing of slopes and named hips.
The bases under a roof arrange from modular ferro-concrete plates with a cement or asphalt coupler on them or wooden (rarefied and continuous) from strips, bars and boards.
Asphaltic concreted covering under a roof is authorized to arrange a coupler on the biases which are not exceeding Vs (20 %).
Surfaces of the bases irrespective of a material from which they are executed, should be equal and not caving in.
Gleams between a surface of the basis under a roof from rolled materials and control three-meter furring should not exceed 5 mm along a slope and 10 mm across a slope; under a roof from piece materials and meter furring than 5 mm in both directions should not be control more. Mortgage details for the miss of pipes establish before stacking a roofing material.
Roof happen single-layered and multilayered. To single-layered concern a roof from steel sheets, asbestos cement slabs and sheets, tape folder tiles; to multilayered - a roof from rolled materials, a flat tape tile, planks , chips, shingles.
The number of layers in multilayered roofing happens from two (rolled materials, a flat tape tile) up to five (rolled materials, chips).
Biases of a roof. For removal of water from a roof to its slopes give a bias expressed in percentage or degrees.
Slopes of one roof usually arrange with an identical bias, which choose depending on architectural requirements, economic reasons and area of construction.
All modern buildings have a flat roof. The slope of roof from local materials (a tile, shingle, chips, etc.) appoint under instructions of corresponding normative documents. The way of tap depends on a bias of a roof and a climatic zone rain and thawed snow from a roof of a building. The drainage system happens organized (external or internal) and unorganized - only external.
The external organized drainage system arrange by means of gutters and external drainpipes. It is recommended to arrange such drainage system in, climatic zones where the probability of freezing of water in external drainpipes is insignificant.