Design requirements for thermal and energy saving of exterior walls and roofs of small block buildings
1. The heat transfer coefficient and thermal inertia index of the outer wall and roof of small block building should meet the requirements of energy-saving design standards for residential buildings in the region. In the hot summer and cold winter zone, when the heat transfer coefficient of the outer wall and the roof meets the specified index and is not more than 1.00 W/(m2Â·K), but the thermal inertia index does not satisfy the specified index and is not less than 3.0, according to this The calculation method of Appendix E of the Regulations is carried out for thermal insulation verification.
2. The roof of the small block building should be designed as an inverted roof with the thermal insulation layer placed on the waterproof layer, and the hydrophobic material should be selected as the thermal insulation layer.
3. For various types of roofs, the thickness of the insulation layer shall be determined by the building thermal design method according to the provisions of the energy-saving design standards for residential buildings in the area. The thermal conductivity and heat storage coefficient of the insulation materials shall be calculated and corrected. Coefficient and calculation of heat storage coefficient.
4. The junction of the gutter, the parapet wall, the deformation joint and the protruding roof of the roof and the roof shall be the minimum heat transfer according to the current national standard â€œCode for Thermal Design of Civil Buildingsâ€ GB.50176-93, Article 4.1.1. Resistance is calculated by thermal calculation, and a certain thickness of insulation material should be set on the vertical or horizontal surface of the part.
5. In the hot summer and cold winter areas and hot summer and warm winter areas, the outer surface of the small block building roof should be light-colored finishing materials. Flat roofs should be covered with green plants or overhead ventilated roofs with insulation.
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