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Discuss Do clipped pipes need felt? in the Central Heating Forum area at UKPlumbersForums.co.uk.

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  1. trf0412

    trf0412 Member

    Just about to put down some new flooring and wondering whether I should unclip the central heating pipes and add some felt, or whether the clips will stop the pipes from rubbing on the joists and any expansion will instead take place to the left and right of the clips? (Photos attached)

    There is a length of pipe between two clips which I suppose is the most likely problem, as this length has nowhere to expand to.

    We haven't lived in this property over winter yet, and the upstairs radiators are currently off for plastering to take place, so it's hard for me to tell how bad the expanding pipe noises are, but before the radiators were removed I did test the new boiler and there were definitely some creaks going on. However, there was one point where the pipes crossed a joist in another room without a clip in place and it was a very tight fit, so I cut a bit of the joists to avoid the pipe being in contact with the wood, which may or may not have solved the problem...

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  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would yes also I would get that dent piece replaced
     
  3. Best

    Best Trusted Plumber Top Contributor!!

    I would always put some dpc membrane around each pipe where it rests on a joist. I just wrap a 2" wide strip of dpc tight around the pipe and use electrical insulating tape around the dpc. Same where pipes are in drilled joists.
    Just one point, - why not use a bending machine? Only a piece of copper pipe and couple of soldered elbows needed (for coming up below floor). Would save cost of all those push fit and superior job, plus air would vent to rad.
     
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  4. sammathias

    sammathias GSR

    Pushfit wins the race.
     
    • Like Like x 1
    • Funny Funny x 1
  5. Best

    Best Trusted Plumber Top Contributor!!

    Maybe, just! But I would have about £12 saved for the extra 5 minutes work I did fitting the professional all copper job.
     
    • Agree Agree x 2
    • Like Like x 1
  6. trf0412

    trf0412 Member

    You'll have to ask the gas engineers who installed it! Incidentally, it's the same company who did this central heating install who I've got coming back to sort out the mess left by our "plumber" with the bathroom install (refer to other thread). So, I hope that, apart from a lack of felt between pipes and joists, you can't spot anything too wrong with this work! (I think I may have accidentally knocked the pipe while removing the floorboards, so the dent is quite likely my doing...)
     
  7. trf0412

    trf0412 Member

    Although in an ideal world there wouldn't be a dent, will it be ok to leave this as it is?
     
  8. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    As long as it's not leaking
     
    • Agree Agree x 1
  9. Best

    Best Trusted Plumber Top Contributor!!

    Did the heating installers cut that ' V ' out of the floorboard, - or was it there beforehand?
    All points to a quick job, but that's the way a lot of work is nowadays. Semi DIY is a good description. If it is done to a cheap price, I guess you get less labour given
     
  10. trf0412

    trf0412 Member

    Nope, they drilled a hole and fed the pipe through. I just cut that 'V' now to remove that floorboard.
     
  11. trf0412

    trf0412 Member

    Where can I get felt (or something equally as appropriate) to wrap around the pipe before I glue & screw flooring down? I tried B&Q but they didn't seem to know what I was after, so maybe I asked for the wrong thing.

    And once I've wrapped something around the pipes, do I need to clip them back down or can they just rest in the notches to expand at their heart's content?
     
  12. trf0412

    trf0412 Member

    Incidentally, when taking up the old floorboards in another room a few months ago, I saw that when the heating was installed (presumably when the house was first built) the pipes were just sat in the notches on little carpet offcuts. Are there any good reasons for not doing this now?
     
    • Useful Useful x 1
  13. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Same as using hair felt lagging and wrapping the pipe it in

    This would work

    Spiral Wrap x 50mm x 7.5m

    It's to allow fir expansion and contraction so you don't get the tap tap or banging noises
     
  14. Ric2013

    Ric2013 Plumber Top Contributor!!

    You can get carpet underlay (the cheapest kind) made from scraps of recycled wool (melted into a sheet of plastic?) that would probably work. I have used it to lag before now.
     
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