I have excavated the old garage floor as the area is going to become a habitable space and I have some queries.
I have layed some type1 mot (100mm) and compacted with a wacker, on top of this I am about to lay a thin layer of building sand (10mm).
I have 100mm insulation boards to go in next but was wondering whether to lay a dpm on top of the sand (just a flat sheet without lapping up) then place the insulation on top and then another dpm before pouring 125mm of concrete on top followed by 60mm of screed.
Also what happens to the lapped dpm, does it just get trimmed at finished fllor level?
Any thoughts on my thinking would be appreciated.
I have layed some type1 mot (100mm) and compacted with a wacker, on top of this I am about to lay a thin layer of building sand (10mm).
I have 100mm insulation boards to go in next but was wondering whether to lay a dpm on top of the sand (just a flat sheet without lapping up) then place the insulation on top and then another dpm before pouring 125mm of concrete on top followed by 60mm of screed.
Also what happens to the lapped dpm, does it just get trimmed at finished fllor level?
Any thoughts on my thinking would be appreciated.