Ryan Bazeley Posted March 5, 2021 Share Posted March 5, 2021 Hi, I am building a house using 172mm SIP’s. My foundations are due to be done in two weeks, I’ve done a lot of reading on this forum and have come up with this drawing. What are peoples thoughts and are there any changes I should make? TIA, Ryan Link to comment Share on other sites More sharing options...
Dave Jones Posted March 5, 2021 Share Posted March 5, 2021 only 100mm insulation not 150 ? and 50mm screed is thin, really need to be 75mm Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 5, 2021 Share Posted March 5, 2021 100mm floor insulation is just above building regs, it needs to be more. Link to comment Share on other sites More sharing options...
Ryan Bazeley Posted March 5, 2021 Author Share Posted March 5, 2021 Architecht originally had 80mm but UFH company stated 100-150mm so perhaps best to go 150mm? regarding the cold bridging at sole plate i have read the forum on this and there is a lot of talk about using marmox blocks to prevent this, is this right? also should I put insulation on the outside of the block work up or over sole plate? Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 5, 2021 Share Posted March 5, 2021 It depends on what you are trying to achieve, that drawing can be improved in many ways. Your architect is a bit out of date. Link to comment Share on other sites More sharing options...
Gus Potter Posted March 5, 2021 Share Posted March 5, 2021 From the SE side it would be wise to look at how the SIPS panels are held down and get this nutted out. A lot of folk have a gut feel that the wind won't lift the house up and this does not happen..often.. However, the big elephant in the room is that lot's of new houses have big wide doors and openings. Here you have less walls.. they are more like columns so they want to over turn as the wind blows on the side of the house. To stop this effect you often need to rely on the holding down straps to stop each panel overturning. To stop over turning you need "ballast".. something heavy to anchor to and you also need to find a fixing method. The super structure providers often say.. holding down system is for the SE, SE says it's for the super structure (kit) designer. No one wants to take responsibilty (someone should do for competant design.. it's in the statutory CDM regulations) for the fixings / straps etc as this requires design time and coodination.. that comes at a cost which is not spelled out to self builders and the like. I would ask some of the SIPS suppliers for options on how the panels are restrained against overturning. Check the SE design to see what uplifts are occuring at the panels and so on as this will impact on how you are developing up your design. All the best. Link to comment Share on other sites More sharing options...
Ryan Bazeley Posted March 6, 2021 Author Share Posted March 6, 2021 9 hours ago, Russell griffiths said: It depends on what you are trying to achieve, that drawing can be improved in many ways. Your architect is a bit out of date. my main concern is condensation / rotting of the sole plate. I added the marmox block myself from reading posts on here. what ways can it be improved? Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 6, 2021 Share Posted March 6, 2021 Look at some posts by @SeanDean he’s been looking at doing the same sort of thing and upgraded his drawings massively from his first design. Link to comment Share on other sites More sharing options...
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