ToughButterCup Posted June 28, 2019 Share Posted June 28, 2019 Lining a wall with plywood isn't as easy as it looks, I'm sure. But then nothing else in house building is either. We are considering lining some walls with ply. The substrate for the ply will be battens fixed on concrete - perfectly rigid, therefore. Question is, how thick should the ply be? Thanks, Ian Link to comment Share on other sites More sharing options...
Alex C Posted June 28, 2019 Share Posted June 28, 2019 (edited) 12mm is generally fine for either a wall finish or to put behind plasterboard so you can put up shelves or cupboards. Has the advantage that it is the same thickness as plasterboard so you can mix and match ply with plasterboard over or double plasterboard. If you are using ply as the final finish make sure you quickly paint it with something like osmo uv protection to stop it going yellow. Edited June 28, 2019 by Alex C Link to comment Share on other sites More sharing options...
the_r_sole Posted June 28, 2019 Share Posted June 28, 2019 (edited) . Edited September 26, 2019 by the_r_sole Link to comment Share on other sites More sharing options...
Alex C Posted June 28, 2019 Share Posted June 28, 2019 37 minutes ago, the_r_sole said: Is it for a finish? I've used 8 and 6mm birch faced ply for a finish before, if it's between two rooms you might want to do something heavier, or even ply over plasterboard for a bit of deadening... you need to watch out for surface spread of flame regs too If you use anything thinner than 12 for a finish it will bow unless you cover it in fixings. I have used 2400 x 600x 9mm sheets of top spec wisa birch ply nailed at 300 centers around the perimeter and it still bowed over its 600mm width over time. Link to comment Share on other sites More sharing options...
the_r_sole Posted June 28, 2019 Share Posted June 28, 2019 (edited) . Edited September 26, 2019 by the_r_sole Link to comment Share on other sites More sharing options...
Construction Channel Posted June 28, 2019 Share Posted June 28, 2019 Why do you want to line it In ply instead of plasterboard? Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 28, 2019 Author Share Posted June 28, 2019 24 minutes ago, Construction Channel said: Why do you want to [...] Cos I do. ? Cheaper than plastering.... £300 for 60 sq m The internal walls upstairs will be PB. We're only going to line some walls with ply ; needs to look sexy like all the ply - lined walls we have seen this summer - and the offices where D works. Looks a treat - but I suspect it can be over-done. Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 28, 2019 Author Share Posted June 28, 2019 44 minutes ago, Alex C said: If you use anything thinner than 12 for a finish it will bow unless you cover it in fixings. [...] I propose putting the boards on to 40 by 40 battens (themselves fastened to the concrete substrate with concrete bolts or maybe 100 , by 75 concrete screws) Boards screwed to the battens with something hefty and plugged. The battens will be painted black so that, using a 3mm gap, there is a sort of 'shadow-gap' round the boards. Gonna look sexy as Hell (Why would I want something like that then?)? Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 28, 2019 Author Share Posted June 28, 2019 1 hour ago, the_r_sole said: [...] you need to watch out for surface spread of flame regs too Yes, exactly. I'm digging around to look those up. Any references you can point me to, please? Link to comment Share on other sites More sharing options...
the_r_sole Posted June 28, 2019 Share Posted June 28, 2019 (edited) . Edited September 26, 2019 by the_r_sole Link to comment Share on other sites More sharing options...
Mr Punter Posted June 28, 2019 Share Posted June 28, 2019 The intumescent clear coatings are v. expensive and I am not sure you will get the finish you want. Unless you have a high percentage of the ply, don't worry about surface flame spread. Feature wall is OK. Link to comment Share on other sites More sharing options...
the_r_sole Posted June 28, 2019 Share Posted June 28, 2019 (edited) . Edited September 26, 2019 by the_r_sole 1 Link to comment Share on other sites More sharing options...
Mr Punter Posted June 28, 2019 Share Posted June 28, 2019 Just now, the_r_sole said: never met a BCO that says that when you're trying to get a house signed off! As long as it is less than 50% of floor area it is OK, so a feature wall, not the whole room. Link to comment Share on other sites More sharing options...
Alex C Posted June 28, 2019 Share Posted June 28, 2019 Make sure you get a high grade birch ply with a least a BB finish otherwise it will look like a shed. You need to pay close attention to the detailing and any shadow gap details/window reveals. When it is done well I suspect it is not cheaper than plasterboard and plaster. If you want to plug the boards that is going to make your mind up for board thickness. Link to comment Share on other sites More sharing options...
Pocster Posted June 28, 2019 Share Posted June 28, 2019 I’ve been “told” to use osb as it’s cheaper and more environmentally friendly..... Link to comment Share on other sites More sharing options...
Weebles Posted June 28, 2019 Share Posted June 28, 2019 We used 12mm shuttering ply as it was the cheapest. The stuff that was sourced from China looked smoother than the stuff from Brazil. Ultimately it’s all hidden under plasterboard. We put it in on walls where extra strength needed (over pocket door frames) or extra noise reduction or where fittings like basins would be hanging. Link to comment Share on other sites More sharing options...
Construction Channel Posted June 28, 2019 Share Posted June 28, 2019 4 hours ago, AnonymousBosch said: Cos I do. ? Cheaper than plastering.... £300 for 60 sq m The internal walls upstairs will be PB. We're only going to line some walls with ply ; needs to look sexy like all the ply - lined walls we have seen this summer - and the offices where D works. Looks a treat - but I suspect it can be over-done. £300 for 60m2?? Unless I missed something that's £15/sheet?????? Where are you getting a finishing grade ply from for that? Fwiw if I had a choice I would replace plaster with ply everywhere. Fill the bastard with screws and leave them showing but I do like the "industrial look" Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 28, 2019 Author Share Posted June 28, 2019 1 hour ago, Construction Channel said: [...] Where are you getting a finishing grade ply from for that? [...] Finishing grade: well not quite but good enough. Where from? My girlfriend Jackie at Haldane Fisher ? 1 Link to comment Share on other sites More sharing options...
Russell griffiths Posted June 28, 2019 Share Posted June 28, 2019 Instead of your shadow gap thing do you know you can get a special profile to put between the sheets to provide the gap I’m thinking of having this on a wall and a ceiling, but all hidden fixings. Link to comment Share on other sites More sharing options...
Onoff Posted June 28, 2019 Share Posted June 28, 2019 Buffalo Board would look nice...maybe...£££! Good company this: https://www.lathamtimber.co.uk/products Link to comment Share on other sites More sharing options...
Moira Niedzwiecka Posted June 28, 2019 Share Posted June 28, 2019 I am going to have some walls faced with birch ply. Winwood timber have been really helpful & supplied samples. Link to comment Share on other sites More sharing options...
Oz07 Posted June 28, 2019 Share Posted June 28, 2019 Developers don't plaster walls because it's more expensive! Link to comment Share on other sites More sharing options...
ProDave Posted June 28, 2019 Share Posted June 28, 2019 7 hours ago, pocster said: I’ve been “told” to use osb as it’s cheaper and more environmentally friendly..... I wired a whole house that was finished in OSB. Yes it looked carp (the wall finish that is not the wiring) And it all had to be painted with that expensive fireproofing treatment. Link to comment Share on other sites More sharing options...
Pete Posted June 28, 2019 Share Posted June 28, 2019 3 hours ago, Russell griffiths said: Instead of your shadow gap thing do you know you can get a special profile to put between the sheets to provide the gap I’m thinking of having this on a wall and a ceiling, but all hidden fixings. What is this profile called please? Link to comment Share on other sites More sharing options...
Russell griffiths Posted June 29, 2019 Share Posted June 29, 2019 9 hours ago, Pete said: What is this profile called please? No idea, I’m still looking for it in this backwards stuck in the dark ages country. Readily available in the states and Australia. Link to comment Share on other sites More sharing options...
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