How are the frame and sash profiles assembled?
A. There are several different ways to assemble windows. The oldest and one of the most common are screwed assembles. This means the main frame and sash profiles are screwed together mechanically. This is not desirable because your window after years of use, opening and closing, can go out of square and rack in the opening preventing the window from operating smoothly and maintaining it’s thermal efficiency. The best quality windows are now fully welded at the master frame and sash profile. This gives you a strong corner in the sash as well as the master frame, so your window will remain square and operate smoothly for years to come.
