I am relocating 2 patio doors in an extension. I know how to get the units out and fit them in the new openings but lately i've noticed that double glazing fitters are using crazy foam in all the gaps around the units. Is the foam squirted in after the units are secured if not can someone enlighten me on the procedure. Many thanks.
Im new to the forum, ive worked in the glass industry for the past 10 years and im just in the process of setting up my own glass and glazing business.
The fitters use foam primarily for gap filling and draught proofing although it does also have adhesive properties,i would always mechanically fix the frames then use the foam sparingly as too much can cause the frame to push inwards or under plaster/render and push it off the wall.