Whats the usual method of fixing where 2 uPVC frames are to be butted
up - like a door and window next to each other ? Leave a small gap
between, foam inside and sealant ? A cover strip over the join ?
A special joining piece ? (if this, not possible as its an old door
and new window probably from different manufacturers)
I did exactly this myself about five years ago (old door, new adjacent
window), and am racking my brains as to how I did it. Am pretty sure
that I got some form of joining piece, but can't remember for sure. It
would have been a component supplied by the window fabricator, which
would have been an adequate fit for the door.
Certainly the overall thickness of door and window were the same, and it
was finished off using 3"-wide strips of uPVC from Wickes, glued on both
sides to cover the gap, which looked fine and would have imparted a fair
amount of strength to the junction.
put a few screws through each frame into the other, then cover the joint
with upvc architrave / jointing strip (the arc only has one bull-nose, but
the jointing strip has two)
Also, don't forget that any window frame adjoining a door frame must have
toughened glass - if the door blows shut in windy weather, the glass in the
window could shatter if it's not toughened.
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