Central Heating Pipes

[NeilGlos]

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

 

[^woody^]

An old sock

 

[BarnabyT]

You might be able to squeeze some expanding foam in from a long tube

 

[JohnD]

you can stuff mineral wool insulation into the hole. It will certainly block draughts. Maybe cut or tear it into small pieces to push through the hole.