TimberFraze

Hi Gballam, Just reading this and the comments and want to put in my 2 cents. Outside to in: Breather Membrane - W1 or W2 depending on where you are 9mm OSB 140mm timber frame with 140mm 0.035R between studs 90mm PIR insulation to face = No thermal bridging, and keeps it thermally broken down to the foundation. Reflective vapour control layer Standard Service Battens OR theoretically can use a partition to save making any penetrations through the VCL but may affect sequencing! Plasterboard Gets you 0.12, keeps it simple and follows passivehouse principles. I think it would be more cost effective than going down bigger stud or other forms of timber frame construction but open to debate! Obviously will come with it's own problems. I also saw a comment about Frametherm 32 insulation, I just want to put a note on it I think it's mega expensive for the performance gain it gives. Fraze