Radiator Supply Pipe, Filling space/cavity/gap around pipe

ranzerox

Hello,

I'm reviving an old topic and filling the space around a radiator supply pipe please. This time, i'm looking for a solution that provides some soundproofing. I think we can use mineral wood but I don't expect that to provide soundproofing. Wondering if anyone has experience with this.

Thanks!

PC7060

Do you mean the small gap around the pipe penetration through floor?

ranzerox

@PC7060 , yes!

Jamie Hall

How big a gap are we talking here? And what is the wall material? If it's a smallish gap -- quarter to half an inch -- I'd use patching plaster.

EBEBRATT-Ed

I would fill it with mineral wool or fiberglass and put a pipe escutcheon over it. You want something moveable for expansion and contraction.

Why the soundproofing what noise are you trying to muffle. If it is pipe banging this is not the fix

ranzerox

@Jamie Hall the gap could be as large as 1.5". The walls and ceilings are plaster. Mud could work but I think they'll be too much movement. Long haul wise may not be lasting solution. thanks

ranzerox

@EBEBRATT-Ed mineral wool would work good, just not confident in its ability to block sound transmission. not concerned about the banging but the the room sound. If I could use some sound sealant or caulk, i would. I found some sealant that looks interesting but doubt I can fll a 1.5" void with it. thanks

Jamie Hall

I'd plaster that gap. But then, plaster patching is one of the odd little skills I've had to learn... I've done some gaps like that. You do have to get some reinforcement in there, but that's easy enough. If the pipe can move at all, though -- and most can -- what you don't want is for the plaster to adhere to the pipe -- so a nice coating of a release agent (almost any oil will do) on the pipe.

hot_rod

1” wall thickness fiberglass pipe insulation, then escutcheon
Hi temperature expanding foam?
Either will sound insulate and allow pipe movement

ChrisJ

hot_rod said:

1” wall thickness fiberglass pipe insulation, then escutcheon Hi temperature expanding foam? Either will sound insulate and allow pipe movement

Melamine foam pipe insulation may work better in this case.

hot_rod

I’ve used this Techlite brand. They used to send out free samples.

https://techlite.com/insulation/