After install window and door, let us learn how to check their installation status on the basis of detailed rules.

1.The seal status of window glass and frame is much important. If the seal bars areis under compression and no obvious gap on connection surface, that means the seal quality of window and door is good.

2.Cleck switch part. It should be keep in mind that all types of aluminum or wood or pvc windows and doors be able to close tightly.

3.Good accessories. The accessories of windows or doors do not lack, install in right place, install tightly and flexibly open and close. In one word they can achieve all their designed functions.