Philxyz Posted July 13, 2023 Share Posted July 13, 2023 (edited) Is this enough depth of 804 stone for this cottage floor? -50mm small/medium stone -30mm compacted 804 stone -DPM -100mm insulation -DPM -UFH in 70mm screed I was expecting way more depth of 804 stone but the builders have put in just approx 30mm (once compacted). How much depth is needed? Edited July 13, 2023 by Philxyz Forgot UFH Link to comment Share on other sites More sharing options...
Conor Posted July 13, 2023 Share Posted July 13, 2023 Depends, what's under the stone? If it's well compacted rubble, then the stone is just there to provide an even surface for the next layer. But normally 100mm of stone, then 25-50mm blinding is normal. Btw, 100mm insualtion isn't really enough for UFH, but I think you're past the point of digging down further? Link to comment Share on other sites More sharing options...
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