zanvan

Thanks for the response. Heritage will not consider anything but pure timber. I could get the timber fire treated but seems this is still not sufficient as the building is around 80% clad and the word cladding seems to send any lender into a flat spin. I have turned every stone with mortgage lenders including Buildstore. Ended up with only one potential for financing the self build. Am going with Velox as this gives me the exterior non combustible exterior to take the cladding and will have Velox contractors to erect the panels (not blocks) that will be made in the factory and craned into place. Was just hoping to find someone who has been down this route. With the various elements I have mentioned I will end up with an overall EPC rating of A. Which is great in the current climate.

I am looking for a solution to having to put timber cladding on the exterior of a single storey build to satisfy Heritage. Mortgage lenders do not like my original plan to go with ICF blocks with EPS on the outside and inside skin. I am now looking at Isotex, Velox, and Porotherm - I believe all of them would give me a non-combustible exterior skin with good insulation and a potential target SAP rating of 0.13. Please assume that I am choosing floor, glazing and roof options wisely that will contribute to this final rating. Has anyone any advice or actually built with any of these systems?