Steps of uPVC window & door assembly

uPVC doors and windows are made from uPVC profile, window accessories and Glass.
To produce an PVC window or door you have to do the following steps:
　Cut the profiles (uPVC Profile, reinforcement and Glazing bead)
　Put reinforcement profile inside the uPVC profiles
　Screw reinforcement profile into PVC profiles
　End mill the mullions, or cut mullions and V shaped groove
　Open holes and grooves for door handles, sash fastener channels and espagnolette
　Weld uPVC profiles 
　Clean the welded corners of uPVC windows
　Assemble windows or doors