andyscotland Posted March 28, 2020 Share Posted March 28, 2020 I'll soon be ready to start fitting plumbing / services in my utility room. I have a corner cupboard which will contain soil stack, hot and cold manifold, UFH manifold, consumer unit and the washing machine / tumble dryer. I was going to make the back wall of this plasterboard on 25mm battens (over PIR onto brick) as the rest of the space. I'm now thinking a sheet of 18mm ply would be easier, as then I could fit pipe/cable clips, valves, electrical units etc wherever I wanted without worrying about getting fixings into/through the plasterboard. Just wondering, if I do that do I need to paint the plywood with something special for fire resistance or can I use normal emulsion paint? Scottish Building regs if that makes a difference. Link to comment Share on other sites More sharing options...
PeterW Posted March 28, 2020 Share Posted March 28, 2020 15mm OSB then 9mm plasterboard would be cheaper ..? Doesn’t the CU still have to go onto a non flammable surface ..? 1 Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 28, 2020 Share Posted March 28, 2020 Why not ply it and then cover in plasterboard and paint, I will be doing this to 90% of my walls 15mm osb then plasterboard i did my last house like this and it makes an amazing difference solid feeling, easy to fix to, adds protection to plasterboard against puncture and dents. Peter beat me, must learn to type faster. 1 Link to comment Share on other sites More sharing options...
andyscotland Posted March 28, 2020 Author Share Posted March 28, 2020 Thanks both. Much better solution. I'd thought one layer to keep the thickness as low as possible as all my dimensions are snug but @PeterW's laminate would work. Now just need to see if I can source any materials in the near future! Link to comment Share on other sites More sharing options...
Adam2 Posted March 28, 2020 Share Posted March 28, 2020 (edited) 35 minutes ago, Russell griffiths said: Why not ply it and then cover in plasterboard and paint, I will be doing this to 90% of my walls 15mm osb then plasterboard i did my last house like this and it makes an amazing difference solid feeling, easy to fix to, adds protection to plasterboard against puncture and dents. Peter beat me, must learn to type faster. Hi @Russell griffiths - interested in this as also building with ICF (one day). Did you just screw the OSB into the webbing on your ICF then screw the plasterboard into the OSB or did you batten things out - which I understands also helps to some degree with U values? Edited March 28, 2020 by Adam2 Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 28, 2020 Share Posted March 28, 2020 @Adam2 the last house I did was timberframe in this one icf I intend adding a service batten then screw osb, then stick plasterboard, no screw holes in plasterboard to fill,just joints to tape, nowhere near ready to do this yet so this is just my first thoughts. 1 Link to comment Share on other sites More sharing options...
scottishjohn Posted March 28, 2020 Share Posted March 28, 2020 2 minutes ago, Russell griffiths said: @Adam2 the last house I did was timberframe in this one icf I intend adding a service batten then screw osb, then stick plasterboard, no screw holes in plasterboard to fill,just joints to tape, nowhere near ready to do this yet so this is just my first thoughts. 15mm osb sounds a bit over the top when you will have batons at std spacing 11mm should be fine Link to comment Share on other sites More sharing options...
ProDave Posted March 28, 2020 Share Posted March 28, 2020 Yes, I used 11mm OSB behind plaserboard where I knew I would want to screw stuff to it. Works fine. Link to comment Share on other sites More sharing options...
Adam2 Posted March 28, 2020 Share Posted March 28, 2020 6 hours ago, Russell griffiths said: @Adam2 the last house I did was timberframe in this one icf I intend adding a service batten then screw osb, then stick plasterboard, no screw holes in plasterboard to fill,just joints to tape, nowhere near ready to do this yet so this is just my first thoughts. Great will follow with interest Link to comment Share on other sites More sharing options...
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