Pipe insulation

[neil-c]

After a burst pipe during the cold snap I want to insulate the rest of my pipes. I want to insulate central heating and water supplies under the ground floor boards but is it worth doing the pipework leading upstatirs at all?

Also is the the kind of stuff to use for 15mm pipe and if so what is meant by the 15 x 25mm title:

http://www.screwfix.com/prods/10943/Plumbing/Coppe...

Lastly if fitting this type of insulation do you do anything other than slip it on - seal up the split or put anything over it?

Thanks in advance

[ssray]

It will fit a 15mm pipe and the insulation is either 10mm thick or 25mm thick

[HiRich]

If you have access to the upstairs pipes, insulate them.

• If you have a bundle of pipes, you could add another wrap around all of them (such as the spiral wrap on your link), which will have a further slight improvement.
• On straight runs, you don't need to fix or tape up.
• On kinks & slight bends, feed a little twist into the foam, which will help it sit better. For tighter bends you may find it easier to cut a mitre joint. If the foam won't sit 'right' tie-wraps moderately tightened sort most issues - remember to trim off the tag.
• Where a radiator pipe comes up through the floorboards, leave the last couple of inches of pipe unlagged. You'll need that jiggle room if you ever mess around with the radiator.
• Where pipes run through joists, use foam offcuts in the holes (as much to stop squeaking as heat retention)
• Don't forget the final runs - pipes under the bath and sink. The benefit is least, but if you have foam left over you may as well put it to use.

[neil-c]

Thanks guys, your advice is appreciated

[lewes]

The norm is 15 x 25 for 15mm copper and 22 x 19 for 22mm for pipework that could be exposed to frost, ground floor floor boards and roof space.

And 15 x 9 and 22 x 9 for pipework not exposed but where you want to retain the heat.

You could use duct or insulation tape on bends where the insulation may flex and expose bare copper

Edited by lewes on Wednesday 10th March 22:31