WWilts Posted December 17, 2021 Share Posted December 17, 2021 18mm tongue & groove chipboard being considered, glued to 400mm centre joists and screwed with Spax at 150mm centres. Expansion space at junction with walls 10mm Is 22 mm (vs 18mm) chipboard necessary? Can either the glue or the screws be omitted without making the floor creaky? Is 10mm expansion at floor perimeter about right? Link to comment Share on other sites More sharing options...
nod Posted December 17, 2021 Share Posted December 17, 2021 I used 22 mil at 600 centre 3 years on No creaks If you use plenty of glue it should be fine While it doesn’t look pretty with glue all over the joists below You do need to make sure that every joist is well coated 1 Link to comment Share on other sites More sharing options...
Moonshine Posted December 17, 2021 Share Posted December 17, 2021 screw the boards down too? 1 Link to comment Share on other sites More sharing options...
Andehh Posted December 17, 2021 Share Posted December 17, 2021 Monitor where walls meet floors, a lot of noise actually comes from a 'silent floor' with a bit of flex in it...but stud walls sitting on them & skirting boards etc rubbing against the floor creating the noise. I cant suggest a fix (I only ever drove screws in between floor:wall flex after we moved into mass produced new builds) - but one to explore/think about as well. 1 Link to comment Share on other sites More sharing options...
WWilts Posted December 17, 2021 Author Share Posted December 17, 2021 Has anyone achieved non-creaky first floor using 18mm T&G chipboard instead of 22 mm? (joist centres 400mm here) Link to comment Share on other sites More sharing options...
Russell griffiths Posted December 17, 2021 Share Posted December 17, 2021 Why would you want to leave out the glue or the screws??? save £20 and regret it later, glue the bugger out of it. 1 Link to comment Share on other sites More sharing options...
keith65 Posted December 17, 2021 Share Posted December 17, 2021 22mm all the time even at 400 centres, plenty of glue and screws never have to think about it again. 1 Link to comment Share on other sites More sharing options...
WWilts Posted December 17, 2021 Author Share Posted December 17, 2021 1 hour ago, Russell griffiths said: Why would you want to leave out the glue or the screws? Builder might. Want to understand stuff so that we can insist on whatever makes a difference Link to comment Share on other sites More sharing options...
Faz Posted December 17, 2021 Share Posted December 17, 2021 And you need the PVU glue too - expands and makes a mess but that is the idea. 1 Link to comment Share on other sites More sharing options...
jfb Posted December 18, 2021 Share Posted December 18, 2021 Make sure the builder uses the correct screws and glue. I didn’t use enough glue to my cost so as soon as the builders are doing it make sure they are. 1 Link to comment Share on other sites More sharing options...
TonyT Posted December 18, 2021 Share Posted December 18, 2021 Glue has been used on chipboard flooring for decades. better glue is available than the basic PVA. If your surname is wimpey or persimmon fully understand otherwise get the glue and fixings out 1 Link to comment Share on other sites More sharing options...
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