MortarThePoint Posted May 23, 2021 Share Posted May 23, 2021 I was pleased to get the keep outs, edge strip and membrane down But unfortunately the UFH pipes are pulling up Any ideas as to how to solve this? I can't use anything that penetrates the green sheeting. It's not insulation underneath, it's concrete and, on ground floor, a gas membrane too. Link to comment Share on other sites More sharing options...
PeterW Posted May 23, 2021 Share Posted May 23, 2021 Just a couple of concrete screws through the tracks will do it. It won’t cause any problems with the membrane - if you’re worried just a glob of LVT sealant under each hole to seal. 1 Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 23, 2021 Author Share Posted May 23, 2021 40 minutes ago, PeterW said: Just a couple of concrete screws through the tracks will do it. It won’t cause any problems with the membrane - if you’re worried just a glob of LVT sealant under each hole to seal. Would be OK upstairs but not with the gas barrier Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 23, 2021 Author Share Posted May 23, 2021 (edited) This is looking promising. I weighed down the closest pipe with a brick overnight. I may also try a heat gun at around 100C (testing on membrane scraps first) Edited May 23, 2021 by MortarThePoint Link to comment Share on other sites More sharing options...
JFDIY Posted May 23, 2021 Share Posted May 23, 2021 Lay the pipe with the twist the other way, then the push down at ends and rise less severely in the middle, when filled with water should flatten out better that way. Link to comment Share on other sites More sharing options...
JamesP Posted May 23, 2021 Share Posted May 23, 2021 (edited) @MortarThePoint If using Pert/Al pipe, try putting a soft bend in the middle of each pipe away from the floor, this should push the end of the loops down. Edited May 23, 2021 by JamesP Link to comment Share on other sites More sharing options...
PeterW Posted May 23, 2021 Share Posted May 23, 2021 1 hour ago, MortarThePoint said: Would be OK upstairs but not with the gas barrier Gas barrier is irrelevant - concrete isn’t gas porous and unless you’ve built a sump etc and got positive pressure under the floor you won’t extract it anyway. If it worked the way you think it will be coming up the outside edges where you’ve turned them up the walls. 1 Link to comment Share on other sites More sharing options...
dpmiller Posted May 23, 2021 Share Posted May 23, 2021 gas barrier would be outside wall to outside wall, continuous. Link to comment Share on other sites More sharing options...
Mr Punter Posted May 23, 2021 Share Posted May 23, 2021 Yes radon barrier goes right over the slab. The green polythene is not a gas membrane. It looks like a separation layer to isolate the screed from the concrete so you have an unbonded screed. Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 31, 2021 Author Share Posted May 31, 2021 Still living through this nightmare. I wish I'd gone with a pipe with an Aluminium layer as they seem to flex and hold better rather than coiling back up. Is that correct of 16mm Pert-Al-Pert? I can use screws upstairs where there is no gas barrier, just the green sheeting. Downstairs I can't though. Nu-Heat sent a decoiler but it doesn't really help. Does Wunda's 16mm Pert-Al-Pert pipe flex and hold? Link to comment Share on other sites More sharing options...
Mr Punter Posted May 31, 2021 Share Posted May 31, 2021 Yes the composite ones stay in place better. 1 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 31, 2021 Share Posted May 31, 2021 Just screw them down a-la @PeterW’s advice! Making holes in membranes is neither here nor there. Failing to keep your UFH pipes down on the deck will be a multiples of £1000 fcuk up with no chance of repair. Seriously……. Just drill the 6mm hole for a concrete screw, then immediately prior to putting the screw home fill the hole top with sealant, smother the screw thread, wind it in, and repeat. This will be of zero detriment to any of the layers. Screw them down or prepare to fail. 2 Link to comment Share on other sites More sharing options...
Mr Punter Posted May 31, 2021 Share Posted May 31, 2021 I have seen an install where the UFH pipes floated to the surface of the concrete. Very very bad. Link to comment Share on other sites More sharing options...
Onoff Posted May 31, 2021 Share Posted May 31, 2021 1 hour ago, Mr Punter said: I have seen an install where the UFH pipes floated to the surface of the concrete. Very very bad. Seem to recall that @oranjeboom had some issues where some pipes popped up through the concrete. Link to comment Share on other sites More sharing options...
oranjeboom Posted May 31, 2021 Share Posted May 31, 2021 23 minutes ago, Onoff said: Seem to recall that @oranjeboom had some issues where some pipes popped up through the concrete. Yes, that was due to the guy pouring the concrete proving his total incompetence at this task (despite being recommended by an architect). Try and keep an eye on the pour if you're gettimg someone else to do that. My pipes were all tied down to wire mesh and filled with water so no excuses for the nightmare that unfolded. Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 31, 2021 Share Posted May 31, 2021 6 hours ago, Nickfromwales said: Screw them down or prepare to fail. Link to comment Share on other sites More sharing options...
MortarThePoint Posted June 1, 2021 Author Share Posted June 1, 2021 11 hours ago, oranjeboom said: Yes, that was due to the guy pouring the concrete proving his total incompetence at this task (despite being recommended by an architect). Try and keep an eye on the pour if you're gettimg someone else to do that. My pipes were all tied down to wire mesh and filled with water so no excuses for the nightmare that unfolded. Did the mesh get pulled up then or the pipes detatch from the mesh? Link to comment Share on other sites More sharing options...
Onoff Posted June 1, 2021 Share Posted June 1, 2021 1 hour ago, MortarThePoint said: Did the mesh get pulled up then or the pipes detatch from the mesh? It's all here: Link to comment Share on other sites More sharing options...
MortarThePoint Posted June 1, 2021 Author Share Posted June 1, 2021 5 hours ago, Onoff said: It's all here: Gulp! You've a commendably philosophical outlook @oranjeboom Link to comment Share on other sites More sharing options...
oranjeboom Posted June 2, 2021 Share Posted June 2, 2021 On 01/06/2021 at 16:12, MortarThePoint said: Gulp! You've a commendably philosophical outlook @oranjeboom There's more to worry about in life! On 01/06/2021 at 08:49, MortarThePoint said: Did the mesh get pulled up then or the pipes detatch from the mesh? No idea how the clutz managed to do it, but forced mesh and pipework to come up through the concrete. Then tried to cover up the shambles by trying to cover up the bits poking through with some more concrete on top...funnily enough I didn't end up with a very level finish.... 1 Link to comment Share on other sites More sharing options...
Mr Punter Posted June 2, 2021 Share Posted June 2, 2021 Concreting is one of the most difficult jobs to get right. Even if you are experienced and well set up it can catch you out. Late delivery, pump gets blocked, wrong mix, wrong weather, not enough skilled labour, poker doesn't work, goes off too quickly / slowly. 1 Link to comment Share on other sites More sharing options...
Pocster Posted June 2, 2021 Share Posted June 2, 2021 24 minutes ago, Mr Punter said: Concreting is one of the most difficult jobs to get right. Even if you are experienced and well set up it can catch you out. Late delivery, pump gets blocked, wrong mix, wrong weather, not enough skilled labour, poker doesn't work, goes off too quickly / slowly. You missed out if I was doing it Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 3, 2021 Share Posted June 3, 2021 (edited) 23 hours ago, pocster said: You missed out if I was doing it They’d use piss coloured cement then most prob ?? Edited June 3, 2021 by Nickfromwales 1 Link to comment Share on other sites More sharing options...
Pocster Posted June 3, 2021 Share Posted June 3, 2021 21 minutes ago, Nickfromwales said: They’d use piss coloured cement then most prob ?? “ Nasty Nick from Wales “ that’s what they say ... 1 Link to comment Share on other sites More sharing options...
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