James94 Posted August 1, 2022 Share Posted August 1, 2022 Seen a few posts but still abit unsure which way is correct. Should the Dpm underlay or overlap? Does it matter? james Link to comment Share on other sites More sharing options...
James94 Posted August 1, 2022 Author Share Posted August 1, 2022 Link to comment Share on other sites More sharing options...
markc Posted August 1, 2022 Share Posted August 1, 2022 I would put the wall membrane under the floor membrane so any moisture/condensation forming on underside of wall DPM would be directed under the floor membrane not on top of it Link to comment Share on other sites More sharing options...
James94 Posted August 1, 2022 Author Share Posted August 1, 2022 @markcthanks for clearing that up. is it best to put the 25mm upstanding directly on the block and beam or sat on top of the pir? thanks Link to comment Share on other sites More sharing options...
markc Posted August 2, 2022 Share Posted August 2, 2022 21 hours ago, James94 said: @markcthanks for clearing that up. is it best to put the 25mm upstanding directly on the block and beam or sat on top of the pir? thanks On top of Pir to reduced gaps and easier to seal etc Link to comment Share on other sites More sharing options...
James94 Posted August 24, 2022 Author Share Posted August 24, 2022 (edited) Sorry if this sounds a silly question but just finishing of the 25mm pir edging strip and was wondering the correct way of taping slip membrane down. Does it have to go up the face of the perimeter pir or can I just cut it up to it and tape to the floor insulation If so do I then tape the perimeter expansion foam down to the slip membrane as i'm unsure of procedure. Regards James Edited August 24, 2022 by James94 Link to comment Share on other sites More sharing options...
markc Posted August 24, 2022 Share Posted August 24, 2022 (edited) 10 minutes ago, James94 said: Sorry if this sounds a silly question but just finishing of the 25mm pir edging strip and was wondering the correct way of taping slip membrane down. Does it have to go up the edge pir or can I just cut it up to it and tape to the 100mm floor pir? If so do I then tape the wunda expansion foam down to the slip membrane as i'm unsure of procedure. Regards James If I’m understanding the question correctly then No right or wrong way, all you are doing is stopping concrete or screed from going down any gaps, 1 to prevent possible cold spots and 2 to prevent sagging or low spots as the runny stuff seeps away. Edited August 24, 2022 by markc Link to comment Share on other sites More sharing options...
James94 Posted August 24, 2022 Author Share Posted August 24, 2022 @markc Thanks for the quick response, will it be ok to use any tape or does it have to be a dpm tape? Regards James Link to comment Share on other sites More sharing options...
markc Posted August 24, 2022 Share Posted August 24, 2022 8 minutes ago, James94 said: @markc Thanks for the quick response, will it be ok to use any tape or does it have to be a dpm tape? Regards James Pretty much any tape will do, duct tape works really well, as does wide insulating tape Link to comment Share on other sites More sharing options...
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