Aluminum doors and windows of the airtight is divided into several grades? How is the arrangement of pros and cons?
If you do their own doors and windows do windows and doors recommended to do plastic doors and windows it, affordable, good sealing, the price of 140 or so, aluminum bridge on the bridge of the good, the price of 500 yuan a square
According to the standard "GBT 7106-2008 building exterior doors and windows airtight, watertight, wind pressure performance classification and testing methods" 8 levels, the higher the level of the lower the amount of penetration, of course, the level of high good!
