Similarly to using model upvc window, besides all sorts of profile material assembly gap should consider, sealing is even, firm also very important, interface gap should not be more than 1mm, this reflects the sealing performance of the window.  

Pvc folding door price philippines usually do the building's inner door, the sealing requirements are not so high.  

All kinds of clearance values are stipulated in national standards, but for customers, the smaller the clearance value of various profiles, the closer the fit, the more exquisite the assembly process, which reflects the accuracy of assembly level and assembly tools.