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Pipe Cavity and Draughts Caused by Radiator Pipe Holes

Postby NeilGlos » Wed Mar 30, 2022 2:50 pm

Good afternoon

The radiator pipes (the flexible type) in my apartment go up behind each radiator and into the wall cavity through a triangular cut out in the plaster board – the triangle is approximately three inches on each side, so not relatively large. However, whilst most of these “holes” are fine, one in particular is prone to noticeable draughts.

Is there a simple way to close off the hole, preferable without having to take the radiator off the wall? I had thought of an appropriate expanding foam, although getting down behind the rad could be tricky, or a more low-tech idea of putting a small towel behind the radiator.

TYIA
Neil
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Postby stoneyboy » Thu Mar 31, 2022 9:51 pm

Hi neilglos,
Get some expanding foam and a length of plastic pipe with a diameter large enough to fit over the foam nozzle.
Maneuver the pipe end into the hole behind the radiator and add foam sparingly.
Regards S
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