Air leakage from windows turns out to be caused by cutting corners on polyurethane foam

Ask:

Mr. ZhangThe windows in my home were installed four years ago. They were fine for the first two years and there were no problems, but they started to leak a little bit last winter. Now that we have entered autumn, the weather is getting colder day by day, Mr. ZhangI am worried that the leakage will get worse, and I would like to ask what is causing this ? Is there any way to deal with it?

Answer:

Generally speaking, the plastic steel windows and aluminum alloy sliding windows installed a few years ago are more or less lax in sealing, Mr. Zhang家也It is verypossibly this kind of window. According to his description, the air leakage was only discovered later, which means there was no problem during the original installation. You can check whether the filling between the window frame and the wall contact edge has fallen off. If so, you can use glass glue to fill these gaps so that there will be no air leakage.

But there is also a possibility that the construction party cut corners and cut corners. According torelevant personnelIntroduction, under normal circumstances, when installing a window, there is a gap between both sides of the window and the wall of 0.5—1cm gaps should be made of polyurethaneFoam glue Block the gap, and then use weather-resistant glue outdoors and ordinary glass glue indoors to seal it. Becausepolyurethane foamThe price is relatively expensive, and some construction parties cut corners and directly use low-priced SealantSealed. The sealant is not very weather-resistant and will dry out and crack over time, which can also cause air leakage.

IfMr. ZhangIf your home has casement windows, in addition to checking whether the filling between the window frame and the wall contact edge is intact, Also check whether the burrs of the sealing strip have fallen off or the hair of the sealing strip has fallen off or become thin. If the problem is with the sealing strip, just replace it with a special sealing strip.

Generally speaking, qualified windows have a certain service life. Under normal use, the sealing strips will not wear or age in a short period of time（However, frequent opening and closing of windows may cause the sealing strip to age prematurely )or profile deformation, Therefore, a common cause of air leakage from windows is improper installation. Improper installation is reflected in many aspects. There may be no gap between the window frame and the wall.There is a gap between the two, which leads to air leakage ;It is also possible that the sealing strip has not been installed properly and is uneven or cracked. drum situation. After these problems occur, the owner should contact the property management or window manufacturer for repairs.

What should you do if the air conditioner in your home leaks?? Polyurethane foam can be used to plug it. This material has very good sound insulation and thermal insulation properties. Even if the air-conditioning holes need to be modified later, the foam glue can be poked out, which is very convenient.