Ay8452

Hi, I could do yes - would the 150mm PIR be a good enough base for the doors?

Hi guys Any glazing fitters who can give me some advice on this? I'm getting conflicting advice at the moment from my fitter/builder. We are fitting Sliding Doors in the kitchen/diner (cortizo cor vision). The horizontal width of the door threshold is approximately 120mm and the doors are fitted flush with outer skin. This means 20mm "overhangs" into the wall cavity (we 100mm inner outer blockwork with 100mm cavity). We have beam and block floor with tiles/screed finish/wet UFH. Can this extra 20mm be fitted to the floor screed? My husband says probably not because the screed won't be strong enough but the glazing fitters say it "should" be fine. We were thinking of just carrying on the concrete mix at the bottom of the cavity up till the door threshold as in the picture below to support the "20mm overhang" of the doors into the cavity to support it. Does this seem sensible? I believe the weight of the door unit is approx 50kg/sqm and door is 4m wide and 2.6m height making the total weight of doors approx 520kg. Thanks Ali

Thanks all for comments. Too late to use two beams unfortunately. If I use aerogel strips and overlap them on the warm side and overlap them either side of the cold bridge area - will that not resolve the cold bridge? I can also apply aerogel externally (cold side) and do the same + plus pack the web with PIR ? Try to make the best of the current situation.

Hi guys, I am doing a renovation and extension of a 1930s house. The extension has a fair amount of steel work and am looking how to sensibly/practically insulate this. What are the recommendations for insulting steel beams and columns? I'll post a couple of scenarios I have below. SCENARIO 1: If the internal web of the steel beam has floor joists etc and the external web is empty/bridging the thermal envelope then pack PIR insulation in the external web/foam and then finish with render board so flush silicone render finish externally. Should I leave a space between the PIR and the renderboard externally to stop moisture ingress? Should I be adding a VCL somewhere internally to this steel? I was considering adding aerogyl strips to the internal aspect of the web (10mm thick) to reduce cold bridging - should this have a VCL added to it? SCENARIO 2: If the internal web of a steel beam is empty and the external web has joists (e.g. flat roof joists for cold flat roof detail) then pack PIR insulation in the internal web and all warm side surfaces of the steel and foil tape it so stop moisture getting to the steelwork. SCENARIO 3: If the internal and external web of a steel beam is empty then pack PIR insulation in the internal web and all warm side surfaces of the steel in the internal web and foil tape it so stop moisture getting to the steelwork. Should I also pack PIR insulation into the external web as well? Have a few other scenarios but will try work those out based on answers for above. Thanks!