屋面防水与保温层做法（Roof waterproof and insulation layer method）.docVIP

屋面防水与保温层做法（Roof waterproof and insulation layer method） 1., the traditional roof construction practices, that is, the positive roof, its structure is generally insulation layer, under the waterproof layer. Because the material of traditional roof insulation layer is pearlite, cement polystyrene board, aerated concrete, lightweight concrete, polystyrene board (EPS) and other materials. These materials are common water absorption rate of the common, if water, heat insulation performance is greatly reduced, can not meet the insulation requirements, so must rely on the waterproof layer in the above, to prevent water infiltration, ensure the insulation dry, side insulation; 2. inverted roof construction practices, the so-called inverted approach, that is, the traditional roof, waterproof layer and insulation layer reversal, waterproof layer below, insulation layer on top. Compared with the traditional construction method, this method can make the first waterproof layer without the phenomenon of thermal expansion and contraction, prolong the service life of the waterproof layer; the waterproof layer on the second insulating layer to provide a layer of physical protection, prevent the damage. Development and characteristics of inverted roof Inverted roofs have been tried in the United States for the first time since 1951, more than half a century ago. From the beginning of 1966 inverted roof in large scale applications with its excellent structural performance, has been applied in an important building in Germany Britain and Japan and other countries on Chinas formal introduction of inverted roof in 1974, by the Changchun construction company first used asphalt expanded perlite as the insulating layer of the successful construction, followed by Beijing, Jiangsu get a wide range of application areas such as [3]. Compared with the traditional roof, the inverted roof is arranged on the insulation layer waterproof layer above the roof, compared with the traditional practices o