markocosic Posted January 3 Share Posted January 3 Let's build a summerhouse/cabin. Try to make it reasonably airtight and insulated but don't plan to register it as a house. Wife changes mind and fancies registering it as a house. (insurable) It's basically finished (just trim at this point). It's not been tested beyond looking for cold bits. Building regs are 0.6 ACH at 50 Pa to get your EPC. Eeeeeee. Cue much furious last ditch window cleaning and adjustment. At least it was cold enough for the rain to be solid. It's one thing being told that bicycles can be ridden online. It's quite another when you know one is about to arrive and you're expected to just ride it. I don't think I've been this uncertain and uncomfortable for years! "Mmmmm" says the man reassuringly. "Well I guess we can try." Thanks... 0.5 ACH on the first go. Smoke pencils did not exit the toolbox. Hell yes. Praise be the OSB and fancy sticky tape. It does seem to work. So relieved that I've gone and bought some panel pins to finish the window trims as a reward. Might even change the busted window cleaner me spring... 1 Link to comment Share on other sites More sharing options...
Russell griffiths Posted January 3 Share Posted January 3 What was your build method it baffles me how over here they think 3 is good going. Link to comment Share on other sites More sharing options...
Kelvin Posted January 3 Share Posted January 3 (edited) 51 minutes ago, Russell griffiths said: What was your build method it baffles me how over here they think 3 is good going. They don’t really think 3 is good it’s just the line where you do need to do something else about ventilation if the builder achieves it. They know that UK building companies have no aspiration to be better hence why airtightness building regs are so poor. Good effort though. It’s a nice feeling. Edited January 3 by Kelvin Link to comment Share on other sites More sharing options...
markocosic Posted January 3 Author Share Posted January 3 1 hour ago, Russell griffiths said: What was your build method it baffles me how over here they think 3 is good going. Stick built on site. 22 mm T&G OSB on floor with bubble glue joints and sticky tape to the walls. 11 mm OSB on inside as airtightness layer on roof and walls with sticky tape joints (Gerband 586). Fleece coated window sticky tape to UPVC windows (Peonsil "full glue internal") with tanking compound (Penosil 660) for the corners because to heck with sticky tape there. (sticks like poop to the fleece and makes a stretchy layer that infills the corner) Soudal flexfoam for sticking in the windows and bulk fill penetrations through floor. (4x 110 mm soil pipes; on for poo; one for water pipe and pump cable and a 50 mm drain ; one for ground source heat pump loop and it's outdoor sensor and AC refrigerant lines and it's cable; one for the incomer and all the other cables) Foam the "Topped off" with MS Polymer floor glue. Shoving loads through a single hole.was a PITA in retrospect. 2x 50 mm waste through floor (10 mm.gap; MS polymer to OSB; dead easy if you leave a big enough hole) 2x MVHR again MS polymer in 10 mm gap. Twinwall flue got a silicone rubber sheet with a hole in. Nothing through walls. Main leaks I think are through roof posts (post and beam; posts made of multiple 145*45s; air leaks between them), corner welds of every window (Rehau Euro 70 cheapo UPVC - would not repeat), and mezzanine floor where the framers put it up before the sticky tape went on the OSB and it's a losing battle to try seal around the entirety of the 195*45 screwed through the OSB to the wall joists. Next time I'd consider a US "zip system" style setup where it's all taped on the outside rather than the inside. Easier to do/supervise. Better for winning against pine martens before the cladding is complete... Link to comment Share on other sites More sharing options...
markocosic Posted January 3 Author Share Posted January 3 43 minutes ago, Kelvin said: Good effort though. It’s a nice feeling Thanks! It's a proper bloody relief... Link to comment Share on other sites More sharing options...
markocosic Posted January 3 Author Share Posted January 3 This is the "paint poo on blanket" method for corners fwiw. This I'd repeat. Fugly but easy. You can also see those corner seams on the UPVC that love to leak in in this pic. Their premium profiles are better in this area. Link to comment Share on other sites More sharing options...
nod Posted January 3 Share Posted January 3 1 hour ago, Kelvin said: They don’t really think 3 is good it’s just the line where you do need to do something else about ventilation if the builder achieves it. They know that UK building companies have no aspiration to be better hence why airtightness building regs are so poor. Good effort though. It’s a nice feeling. Most mass produced homes arnt air tested I used to see air tests being carried out on sites every week While commercial properties are still done It’s quite a few years since I’ve seen an air test being carried out on a site I’m guessing that it’s being done as a desktop Most claim sub 2 When I’ve asked about testing Site mangers all say the same Done while you are not here What are the chances Link to comment Share on other sites More sharing options...
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