Joist banging copper pipe

Screw a batten to the joist directly below the pipe and secure the pipe with a pipe clip.

 

Are the pipes running through the joists or are the joists 'notched' at the top to accept the pipework?

 

Soft foam(lagging) or silicone I'd say.

Mr. HandyAndy - Really

 

If there is space around the pipe, then fit some felt lagging. The banging noise occurs when the pipes get hot and due to expansion and contraction rubbing against the wood.

 

This is the stuff used when doing my CH pipes, the joist were notched, so I could wrap the felt around the pipes on the joist. its thinner than foam lagging. Available from local plumbers merchant, there are two types one on the roll and another a sock type which slides over the pipe, use the prior.

If the pipes haven't been drilled down too deep, maybe notch them, but try the clip method first.

 

PLEASE DON'T NOTCH THE JOISTS. EVER.

 

Nobody is notching joists, as the original post says he has a pipe making a noise and then later confirms it goes through the joist not notched. Wish people would read properly before replying to the threads.

 

If you read the post properly he has already said the pipe is drilled the joist and not notched, if people would read posts first then they may be able to give an answer that would be creditable.

 

From what you have said Im afraid the only real guanreneed cure is to cut out the offending section, notch and lag as previously described.
Have to say you dont often see copper through joists like that as its not usually flexiable enough to feed through. Also sounds as though the installer has left the holes incredibly tight.

 

I think the Construction Project Manager meant don't notch the joists in general. He probably believes it may weaken the joists to a degree that the building will become unstable and fall down.

 

But that depends how far to the centre the pipes are run. The maximum you can generally notch a joist would be 25-30 mm from the top edge.
Joists are not oversized any more as the smallest joist for the job is generally used now to save cost, hence why notching is frowned upon.

 

Can still be done provided its done to the specs below.

www.tameside.gov.uk/buildingcontrol/guidancenotes/note7.pdf

I wonder if this is a new build. If so the OP should get the builders back in to rectify as he has comeback under the NHBS scheme, or if its a new system in an old house get the installers back.

 

If it's really tight slip a bit of Radsnap around it and slide into the joist it will act as a bearing and should stop the squeak.

http://www.screwfix.com/p/talon-snappit-white-200mm-pack-of-10/98443

 

I did read the post, my response referred to this post:

So next time read the thread not just the OP.

 

Great tip, have to admit I wouldnt have thought of that as I detest those pipe covers