⑴ Cement Mortar Leveling layer: When the structural layer is cast-in-place concrete monolithic slab, the thickness is 15~20mm, when the whole or block material insulation layer, Synthetic Roofing Underlayment the thickness is 20~25mm, when the structural layer is the assembled concrete slab and the insulating layer is loose material, the thickness is 20~30mm.
Cement mortar uses 1:2.5 ~ 1:3 (Cement: Sand) volume ratio, cement strength level is not less than 32.5.
⑵ Fine Stone Concrete leveling layer: thickness is 30~35mm, concrete strength grade is not less than C20.
⑶ Asphalt Mortar Leveling layer: When the structural layer is cast-in-place concrete monolithic slab, the thickness is 15~20mm, when the structural layer is assembled concrete slab and the insulating layer is whole or block material, the thickness is 20~25mm. Asphalt mortar used 1:8 (asphalt: Sand) quality ratio.
The flat roof uses the structure to find the slope should not be less than 3%, the material finds the slope to be 2%; gutter, eaves ditch longitudinal slope should not be less than 1%, ditch bottom water should not exceed 200mm.
Leveling layer in the prominent roof structure (daughter Wall, Gable, deformed seam, chimney) at the junction and corner should be made into a garden arc, Synthetic Roofing Underlayment the radius of the garden when the waterproof layer for asphalt waterproof roll material when r=100~150mm, polymer modified asphalt waterproofing membrane r=50mm, synthetic polymer waterproofing membrane when r=20mm. The internal drainage of the mouth around the water, leveling layer should be made slightly lower pits.
Leveling layer should be slotted, Synthetic Roofing Underlayment and embedded sealing material. The slot should be left in the end seam of the plate, the maximum spacing between the longitudinal and transverse joints, cement mortar or fine stone concrete leveling layer should not be greater than 6m, asphalt mortar should not be greater than 4m.
Insulation materials can be divided into three categories: one is loose materials, such as slag, expanded vermiculite, expanded perlite, etc., has been less used. The second is the plate-like material, such as expanded vermiculite, expanded perlite block, foam cement, aerated concrete block, rock Wool Board, Synthetic Roofing Underlayment EPS poly-Stupid board, XPS extruded Plastic board. Third, the whole is pouring (spraying) insulation layer, such as asphalt expansion vermiculite, asphalt expansion perlite, polyurethane foam waterproof insulation system, such as integration.
At present, more use is the Rock Wool Board, Synthetic Roofing Underlayment EPS poly-Stupid board, XPS extruded plate and other plate materials. Polyurethane foam waterproof insulation and other integrated systems developed rapidly.
Insulation layer before the construction of the grass-roots should be flat, Synthetic Roofing Underlayment dry and clean, insulation board close (rely on) grass-roots, paving pad stability, Synthetic Roofing Underlayment layering seam staggered, seam tight, the gap between the plate should be used in the same type of material embedded dense, paste should be affixed to strict adhesion, find the correct slope