jayc89 Posted October 29, 2021 Author Posted October 29, 2021 Just now, ETC said: VCL? Between the EPS and Slab? I plan to add that, it's just omitted from the diagram, doh.
jayc89 Posted October 29, 2021 Author Posted October 29, 2021 9 minutes ago, ETC said: Plus 225mm for droppings below the lowest DPC. It's a good point and I'm not sure how to mitigate that as 225mm above the top of the lean mix would be touching the vertical DPC. Any ideas?
ETC Posted October 29, 2021 Posted October 29, 2021 Stepped DPC/ move DPM above the floor insulation. Also your DPC in the outer leaf is too low.
Gordo Posted October 29, 2021 Posted October 29, 2021 2 hours ago, ETC said: VCL? Yeah. Need a VCL over insulation. That’s why I’d suggest DPM/radon on top. To act as VCL and keep concrete slurry from going in between imperfections in insulation. 1
saveasteading Posted October 29, 2021 Posted October 29, 2021 5 minutes ago, Gordo said: keep concrete slurry from going in between imperfections in insulation. Not good news when that happens! A lot of floating insulation carrying up any reinforcement and also pipes if you have UFH.
Gordo Posted October 29, 2021 Posted October 29, 2021 2 hours ago, ETC said: Stepped DPC/ move DPM above the floor insulation. Also your DPC in the outer leaf is too low. Id second that both these points. Note this would only alllow 75mm brick course to FFL for tamping screed. Perhaps lower insulation by 25mm or so for a 100mm screed.
Gordo Posted October 29, 2021 Posted October 29, 2021 2 minutes ago, saveasteading said: Not good news when that happens! A lot of floating insulation carrying up any reinforcement and also pipes if you have UFH. Lol I’ve heard of this risk, but have never seen it happen yet. Still not worth the chance.
saveasteading Posted October 29, 2021 Posted October 29, 2021 Have seen it happen...lucky I arrived to save the day. The usual problem of too much water in the mix. It pushed down again. sealing the joints or polythene over is such a good and simple thing. 1
Gordo Posted October 29, 2021 Posted October 29, 2021 (edited) Was just thinking there. This floor makeup really suits timber frame with services in walls (not a fan). But with the traditional cavity wall construction a lot of services would I guess be in floor screed? The plumber will likely want to fix these down for screeding operation. Maybe best to consider a concrete sub-floor with DPM under. Anyone got some thoughts/input on this? Edited October 29, 2021 by Gordo
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