Roof Insulation Energy - Saving Design Standards

- Aug 01, 2017 -

(1) Positive roof (external thermal roof) is the insulation layer is located above the structural layer, under the waterproof layer to form a closed insulation layer. This type of roof insulation is the insulation material on the outside of the roof floor, so that the roof of the floor by the insulation layer protection and not subject to excessive temperature stress. The thermal performance of the entire roof can be guaranteed, can effectively avoid the roof structure of the internal condensation and freezing. Roof can be used. Construction Practices: It is common practice to set up a thermal insulation material on the floor and a waterproof layer and a protective layer on the outside of the insulation. The thickness of the insulation material shall be calculated by thermal calculation and shall meet the energy saving design standard of the thermal section of the building.

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According to the civil building energy efficiency design standards and civil construction thermal design requirements to determine the roof insulation layer, to ensure that the winter roof surface temperature and indoor heating ambient temperature difference of less than 4 ° C.

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(2) inverted roof insulation: the insulation layer is set on top of the waterproof layer, the formation of open-type insulation layer. Also known as external insulation.

Lin felt flat roof insulation construction practice B, inverted linoleum insulation roof construction practices

The inverted roof is relative to the traditional roof. This kind of roof insulation form is an inverted form of external thermal roofing, the so-called inverted roof, is the traditional roof structure of the insulation layer and waterproof layer upside down, the insulation layer on the waterproof layer above the waterproof layer for insulation layer And the floor of the interface, the upper protective layer of the insulation layer has a good permeability and breathable properties. This roofing structure is still outside the roof insulation and roof insulation form, can effectively avoid the internal condensation, but also to the waterproof layer is well protected, the roof structure of the durability has also been improved, but the insulation material of the water Performance has a higher demand, insulation materials should be selected when the thermal insulation material bricks adiabatic performance by rain soaking the minimum principle. Domestic for the inverted roof of the insulation materials are mainly foam glass, extruded polystyrene foam board, polyethylene foam board.

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In the definition of inverted roof, with particular emphasis on the "hydrophobic" insulation materials, engineering commonly used insulation materials such as cement expanded perlite, cement vermiculite, mineral wool Yanmian are non-hydrophobic, such insulation materials if moisture , The thermal conductivity will increase sharply, so it appeared in the general insulation roof to be done in the insulation layer waterproof layer, under the insulation layer to do gas barrier, thereby increasing the cost, so that the structure of the complex. Second, the waterproof material exposed to the top, to speed up its aging, shortening the life of the waterproof layer, it should be added to the waterproof layer protective layer, which in turn will increase the additional investment. Again, for the closed insulation layer, the soil due to the atmosphere, duration and other effects, it is difficult to achieve its moisture content is equivalent to the natural dry state of water content: as a result of insulation layer and leveling layer drying difficulties Steam roof, then, because the roof protruding a large number of drainage holes, not only affect the use of the roof and view, and artificially destroyed the integrity of the waterproof layer, the drainage hole on the rain cover and often easy to kick off, but the rain Poured into the hole.

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Inverted roof for cold areas and hot summer and cold winter areas of new and transformation of residential roof insulation. According to the civil building energy efficiency standards and civil construction hot land design requirements to determine the roof insulation layer, to ensure that the winter roof surface temperature and indoor heating ambient temperature difference of less than 4 ° C, the waterproof layer can extend the service life of 2-4 Times