I have fitted the frame for my new French Doors. Everything is square and doors fit perfectly but the top of the frame droops when doors are opened.
I can't see any fixing holes to drill through??Am I missing something and which drillbit is the best for going through Upvc and steel lintel??
the general trade solution to this would be to prop the frame a correct height and inject expanding foam into surrounding space/cavity.sets hard and sticks to everything.Id still like to put a fixing through though.best drill would be hss or better for drilling steel.
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