May 1, 20215 yr Beam and block floor, beams perpendicular to the door opening. Should/could the beams protrude towards the outer leaf to support the part of the floor within the door opening? With beams running along the opening I take that cavity closer *has to* provide support, but what in this case?
May 1, 20215 yr I don't think any of the beams should go as far as the outer leaf. That would represent a thermal and possible damp bridge.
May 2, 20215 yr Author I agree, there should be some gap for perimeter insulation. I checked the cavity closers and they actually do not provide structural support, this is down to the slab to be strong enough to overgang. Which may be ok for 100mm cavity, but how is that dealt with in case of wide (say 300mm, 400mm?) cavities?
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