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I will speak to my local BC team and see what they say. I'm fairly sure though, that table 4.3 doesn't deal with walls *to be* insulated, it deals with retained thermal elements (i.e. existing walls) that are being renovated. Rendering or adding new material (such as cladding) to a wall...

Ok, do you care to expand on that? The way I see it, L1b states if you renovate more than 50% of the area of a thermal element you are required to meet a certain standard of thermal conductivity. When renovating a retained thermal element that has a U-value greater than column a in table 4.3...

I'd say the idea of L1b is to ensure certain standards of insulation are met, and only to improve where they are not met. I'm saying that my calculations and best estimates using online tools show that my wall already exceeds the standards set out to be achieved in L1b, and I'm asking the...

Hello, I have a late 70s built semi detached house that has pebble dash above the ground floor window and porch up to the soffits. The pebble dashing is starting to crack and we've had some water ingress to the porch. In light of this we're looking at getting the front elevation rendered in an...