What is the cause of air leakage in UPVC windows?

Most people knew the performance of UPVC Window before the renovation, so they chose UPVC Window. But after installation, it was found that the windows were leaking. What are the reasons for the air leakage of UPVC Window? How to solve it?

Reasons for air leakage of UPVC Window:

There may be four reasons for the air leakage phenomenon of UPVC Window: the window gap is too large, the larger the gap, the more serious the air leakage; the hardware equipment is not locked tightly, the window sash is dropped, and the window is deformed.

How to solve the air leakage phenomenon of UPVC Window:

1. Kraft paper repair:

When we are repairing, we can use kraft paper for enhanced protection. It is good to keep it airtight when pasting and repairing, so that the indoor temperature can be maintained.

2. Glue to seal up the gaps in the windows

If the window leaks because there is a gap between the window frame and the wall, you need to glue the window gap. If the gap is large, styrofoam needs to be filled and then treated with sealant.

3. Seal the diagonal corners of the window molding

The window frame of UPVC Window has a set of drainage system, the outer drainage hole is connected with the cavity where the hollow glass is placed, and the cold air will enter the glass cavity along the drainage hole. Wind leakage from windows may also be caused by air leakage at the opposite corners of the window moldings. At this time, it is necessary to use sealant to seal at the diagonal corners of the bead.