saulgalloway

Useful links Wookey. What are these blocks shown at 37 secs ? How is the compacfoam attached to the bracket? https://youtu.be/GUUrd7dbBzU?t=37 I had just thought of bracketing a sill of compacfoam or foamglas to support the weight like this

Bump, any thoughts?

Hi, sorry to steam right in with a question, but tbh it's why I joined the forum to pick your collective brains! About 1/2 way through a deep refurb of a bungalow, all that was left was the walls and I wish I hadn't, but had had such a bellyful of planning in AONB and green belt that I couldnt face going back to argue for a complete rebuild application. The existing walls are atypical, 220mm thick, 85mm light block, 50mm empty unventilated cavity, 85mm light block. for simplicity I've treated this as a flat laid solid 215mm aircrete block. The wall build up from outside in will be silicone render, 150mm graphite EPS, 220mm existing wall, 0.5mm aluminium foil membrane (vapour barrier), 25mm PIR, 12.5mm plasterboard and 3mm skim. I'm planning on Internorm HF410 windows which have a potential U of 0.64 but I have to stick to 3 sashes in 1.8m windows so will be a bit worse worse than that with more frame/mullion and less glass. I've attached images of the proposed window mounting outrigged in the EPS. I had thought to line out the rough window opening with 50mm celotex or similar on all 4 sides of the rough opening and hang the window out in the external insulation EPS with brackets. I thought that if I ran a chunky sub sill of PIR/PUR under the window I could screw and plate that external to the wall to support the majority of the window weight. The bottom brackets could be L shaped and run down the inner wall face to resist any tendency to "turn out" the bottom course of block? Suggestions / critique gratefully received.