External wall insulation

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External wall insulation sandwich approach is to be divided into load-bearing walls and protective portion, leaving a certain gap in the middle, filled with loose or bulk inorganic insulation materials such as slag, expanded perlite, or not fill material made of an air layer. The practice in the northern cold regions have a certain percentage of applications. Such walls have a certain insulation properties, but its drawback is also very obvious. Exterior insulation and construction. With the rapid development and national energy efficiency standards in recent years, technology continues to improve external insulation, exterior insulation applications continue to expand, and with authorities, experts, developers and tenants of recognition. Since the outer insulation system is placed in the outer walls, directly withstand thermal stress, water, wind, fire and impact of the eflooring for indoor enclosed porch arthquake in nature, and therefore the external wall insulation system put forward higher requirements.

Since the outer insulation has help to protect the main structure, to extend the life of the building, improve the wet wall, increasing the housing area and other obvious advantages, external insulation applications will continue to expand and will become mainstream. However, the exterior insulation and construction insulation there is also off, cracking, water seepage and wall finishes coating cracks and other quality problems. (B) off adhesive layer insulation work has become common quality defects, and further expansion of momentum. After shedding the scene of numerous national investigation and problem analysis, we can see the reason of the problem: the bond area of ​​less than 30%; bond resulting in sagging innings cloth empty sticky or virtual sticky; screeds with the main wall hollowing, especially long seepage, and prone to persistent hollowing hollowing area expanded, so that insulation joint hollowing or partial destruction; insulation board surface load is too large, easy to peel the insulation layer directly cause a drop; negative pressure resistance measures unreasonable use, easy to form some insulation pressure plate is destroyed and hollowing, shedding.

At the same time, but also pay attention to the length of time of the bond issue. The correct solution is on-site quality control personnel are trained in understanding the structure of the insulation layer on the basis of the characteristics and testing composite wood cladding panels methods to clear the site of all kinds of materials. When construction on the bonding area to control the use of adhesive material do not add too much water, when on-site surface interfacial wall base treatment, a large area of ​​positive and negative pressure using adhesive and rivets protective measures reinforcing and maximize share its bonding area, right on time bonding material were tested compared to the manufacturer's laboratory for field assessment.