Glass wool felt in the roof of the general use of composite forms, veneer aluminum foil glass wool felt widely used. Glass wool felt, sound-absorbing cotton felt is an ideal sound insulation and thermal insulation materials, widely used in housing walls, ship cabin insulation; computer room, cold storage temperature; a variety of generator room, pump room noise reduction; Audio cabinet, audio adjustment and so on.
Centrifugal glass wool felt in the use of the roof, the surface is often attached to a certain sound effect of the finishes, such as less than 0.5mm plastic film, metal mesh, screens, fire cloth, glass cloth, etc., can basically maintain the original sound characteristic. Centrifugal glass wool with fire, insulation, easy to cut and other excellent features, is the building sound absorption of the most commonly used material thickness unchanged, bulk density increases, the low frequency sound absorption coefficient also increased; but when the bulk density increased to a certain extent, the material becomes Dense, flow resistance is greater than the best flow resistance, but also decreased sound absorption coefficient. For centrifugal glass wool with a thickness of more than 5cm and a weight of 16Kg / m3, the low frequency of 125Hz is about 0.2, and the sound absorption coefficient of high frequency (> 500Hz) is close to 1. When the thickness from 5cm continue to increase, the low-frequency sound absorption coefficient gradually increased, when the thickness is greater than 1m or more, the low frequency 125Hz sound absorption coefficient will be close to 1. When the thickness of the same, bulk density, centrifugal glass wool Low-frequency sound absorption coefficient will continue to improve, when the bulk density close to 110kg / m3 sound absorption performance to reach the maximum, 50mm thick, frequency 125Hz near 0.6-0.7, generally not more than 120kg.
In recent years, in southern China to promote more inverted roof approach, the insulation layer will be placed on top of the waterproof layer. Such practices must be hydrophobic insulation materials, such as extruded panels, etc., and the insulation layer to be set up on the protective layer of fine stone concrete. The practice can avoid the insulation layer of channeling water to some extent, but because the insulation layer is not set on the waterproof layer, the water easily into the insulation layer and exists in the insulation layer of the gap, such as slit, insulation board and waterproof layer, On the one hand to reduce the insulation effect, on the other hand, when entering the winter, due to icing swelling caused by protective layer and surface cracking damage, affecting the use of the roof. Although the inverted roof waterproofing layer is placed under the insulation layer, the leakage of the water layer between the waterproof layer and the structural layer can not be achieved due to the conventional waterproofing layer bonding process. In addition, the maintenance process is complex, the need to waterproof above the insulation, protection, surface layer and other structural levels all expose, laborious.
Whether it is orthodox or inverted roof, in addition to the above construction practices exist inherent deficiencies, but also because the roof structure level is complex, on-site construction by the human factors, the structure of the hierarchical construction, mutual influence, or even because of different The cooperation between the construction units, resulting in the roof of the functional layers failed to achieve the desired role in the design.
According to the above analysis, the existing roof construction practices mainly exist in the following aspects:
Because the roof waterproof layer and the structure layer between the channeling layer, resulting in leakage occurs, and difficult to repair; insulation layer is easy to water, water, insulation layer of moisture lead to rapid insulation effect; Inter-layer construction, mutual constraints.