September 25, 20242 yr Hi All, Just looking for a sanity check on my foundation detail. I have a highly insulated build (200mm PIR above DPC, full fill XPS below DPC). Based on a Greenbuilding Store case study: https://greenbuildingstore.co.uk/golcar-passivhaus-ground-floor-foundations/ Cutting the insulation to the falls of the DPC cavity tray was an absolute headache. We ended up setting up a jigg and then using the offcuts to bring XPS up to create a flat ledge below the first wall tie. We then started the PIR above this. When installing the XPS above the cavity tray, it kicked out compared to the PIR above. This meant that there would have been a step in the SureCav. To get over this, I introduced a second cavity tray that lapped up the face of the bottom board of PIR. Will this work? Does anyone foresee any issues? I've already constructed up to about 4ft along one wall so hoping this works but equally stressed about continuing as it will only get more expensive to rectify if there is a problem. Kind Regards, George
September 26, 20242 yr Author Reposted here and cannot delete (links don't appear to be working on this post):
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