running 22mm pipes through joists

[Tom__40]

Hi. I wondered what people normally use to wrap them or fix in place when running them through several joists. I was thinking about using some wool sleeving just for bit passing through the wood (I'll only have 5mm all around if I use a 32mm bit for the hole..), maybe climaflex the rest? I just want to minimise chance of noisy heating pipes!

cheers

 

[polesapart]

Pipewrap, wool, old towel, anything.

What you're trying to avoid is pipes fitted hard up against each other or joist or floorboard and "ticking" or creaking as they expand/contract along their length.

If you've oversized the holes and are usung plastic you'll probably be alright anyway. What you propose sounds good.

 

[Tom__40]

Thanks, I think what was worrying me slightly was I found this thread (https://www.plumbersforums.net/threads/insulating-pipes-already-insulated-with-old-pipe-felt.85308/) about something called hair felt lagging that someone says poses a serious fire risk! From what I read about wool sleeving I should be ok. It looks very similar to me but I'm not sure if it's the same thing!

cheers

 

[denso13]

Old hair felt was a problem but it was intrinsically safe. It didn't self combust, someone had to set it alight first. Got the heart racing when soldering something and the hair felt lit up and the flame disappeared into the distance.

It's fine for stopping noises in notches or holes.