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    • tired dad
    • By tired dad 17th Sep 16, 11:54 AM
    • 469Posts
    • 150Thanks
    tired dad
    Very creaky floorboards in new extension
    • #1
    • 17th Sep 16, 11:54 AM
    Very creaky floorboards in new extension 17th Sep 16 at 11:54 AM
    Hi,
    Got a storey extension built. P5 chipboard flooring upstairs in a large room 7x5m.

    It's been glued and screwed down +++ yet squeaks and creaks a lot when walking on it.

    Any ideas? Builder been round and put more glue and screws but still noisy.

    The underlay and carpet are not installed yet so we are walking on small off cuts of old carpet.

    Builder is hoping it just quietness down with use as the whole construction settles.

    Thoughts welcome
Page 1
    • cyclonebri1
    • By cyclonebri1 17th Sep 16, 1:38 PM
    • 12,436 Posts
    • 5,123 Thanks
    cyclonebri1
    • #2
    • 17th Sep 16, 1:38 PM
    • #2
    • 17th Sep 16, 1:38 PM
    If you were doing this for yourself you(I) would glue the flooring and nail it. But, given it's screwed down there is a suggestion that the support, ie, the joists, are not completely supportive,
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    • Fat Walt
    • By Fat Walt 17th Sep 16, 1:41 PM
    • 251 Posts
    • 138 Thanks
    Fat Walt
    • #3
    • 17th Sep 16, 1:41 PM
    • #3
    • 17th Sep 16, 1:41 PM
    If were glued down on installation, how come he's been able to put more glue down?
    • Marktheshark
    • By Marktheshark 17th Sep 16, 1:43 PM
    • 5,077 Posts
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    Marktheshark
    • #4
    • 17th Sep 16, 1:43 PM
    • #4
    • 17th Sep 16, 1:43 PM
    Have they used chipboard screws ?
    They do creak, daft as the name suggest they are not the quietest thing to screw a floor down with
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    • tired dad
    • By tired dad 17th Sep 16, 3:23 PM
    • 469 Posts
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    tired dad
    • #5
    • 17th Sep 16, 3:23 PM
    • #5
    • 17th Sep 16, 3:23 PM
    I think the boards are screwed down and they glued the T&G.

    You think they should try different screws? which ones?

    Thanks
    • brightontraveller
    • By brightontraveller 18th Sep 16, 12:54 PM
    • 1,125 Posts
    • 432 Thanks
    brightontraveller
    • #6
    • 18th Sep 16, 12:54 PM
    • #6
    • 18th Sep 16, 12:54 PM
    If you assume the floor has been secured to correct depth, using correct size, type of fastener and glued correctly and joist themselves are sufficient then very often with a new build its down to moisture movement, loss of dimension in the joists themselves etc not uncommon at all .

    Below link gives a cause and cure.

    http://www.contractflooringjournal.co.uk/march2014/help1.html
    Last edited by brightontraveller; 18-09-2016 at 1:06 PM.
    • leveller2911
    • By leveller2911 18th Sep 16, 1:39 PM
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    leveller2911
    • #7
    • 18th Sep 16, 1:39 PM
    • #7
    • 18th Sep 16, 1:39 PM
    I've seen this dozens of times over the years and in most cases the problem is when they screw the floor down they don't drill a pilot/clearance hole for the screw in the flooring. So when they start screwing in the screw with a cordless it does through the flooring and when it hits the joist it starts rising the flooring upwards untill it finally gets enough downward force for the screw to start going into the joist. Then when they screw it fully down and the screw then countersinks in the top of the chipboard flooring they stop screwing thinking the flooring is fully down on the joist...Which it isn't because when people walk on it there is still a small gap between the underside of the flooring and the top of the floor joist so they squeek.

    Solution is to take out the screws around the area affected ,drill a hole slightly bigger in diameter than the screw thread but only in the flooring (not the joists) and then re fix the screws, larger headed screw may also help.
    Last edited by leveller2911; 18-09-2016 at 1:43 PM.
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    • prowla
    • By prowla 18th Sep 16, 1:48 PM
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    prowla
    • #8
    • 18th Sep 16, 1:48 PM
    • #8
    • 18th Sep 16, 1:48 PM
    I've hear that talcum powder in the (tongue & groove?) gaps between the boards can help.

    I tried it and I'm not sure it did, though.
    • missile
    • By missile 18th Sep 16, 6:54 PM
    • 8,148 Posts
    • 3,876 Thanks
    missile
    • #9
    • 18th Sep 16, 6:54 PM
    • #9
    • 18th Sep 16, 6:54 PM
    I've hear that talcum powder in the (tongue & groove?) gaps between the boards can help.

    I tried it and I'm not sure it did, though.
    Originally posted by prowla
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    • tired dad
    • By tired dad 18th Sep 16, 9:56 PM
    • 469 Posts
    • 150 Thanks
    tired dad
    saw these on screwfix

    http://www.screwfix.com/p/spax-flooring-screws-4-5-x-60mm-pack-of-300/88716

    I like the idea of the pilot hole
    • Furts
    • By Furts 19th Sep 16, 7:17 AM
    • 2,741 Posts
    • 1,694 Thanks
    Furts
    Squeaky floors happen in numerous new homes. An unfortunate fact of life. Curing them can be troublesome and inconvenient.

    A fundamental of building is this should not occur. Another fundamental is a floor can be fine when it is built but the problems occur after the home dries out, shrinks and settles. Say 6 months or up to two ears for this. This means if a problem exists now, it will only get worse.

    The good news is good carpet and good underlay can muffle the sounds in the bedrooms. The bad news is the ceilings below amplify cracking noises.

    It sounds like your builder is not knowledgable, or not a good builder, or is feeding you nonsense with the "hoping it will settle down" story.
    • trogg
    • By trogg 21st Sep 16, 5:56 PM
    • 102 Posts
    • 56 Thanks
    trogg
    As leveller2911 said above.
    I've done it myself, screwed the flooring into the joists without drilling a hole into the flooring first.
    • beaker141
    • By beaker141 22nd Sep 16, 12:54 PM
    • 361 Posts
    • 146 Thanks
    beaker141
    I did my own loft flooring (full b regs conversion) and it doesnt creak at all - whereas the extension the builder did - creaks a lot!

    In the loft between the chipboard floor and joists, I put the black dpc membrane strip between the joist and boards (tip from my electrician), made sure all T&G joints were on a joist (it helped that they were 3" thick) or took the T&G off and had butt joints, drilled pilot hole for the screws and then screwed them down whilst stood on the board to keep it in contact with the joist.

    The builder however, left the T&G joints wherever they occured (which is probably normal), didnt use pilot holes, missed the joists with some screws, didnt use glue and didnt use any DPC (again normal not to).
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