Hello,
So we have been provided planning consent and just going through the finer details. Waiting on building regs and the plans are with the structural engineer. I am aware that cavity walls are now to be 150mm thick, but with so many products out there, which is the best, yet cost effective cavity insulation to use. The house is a 1.5,(dormer style) 4 bedroom detached dwelling.
Any help is greatly received.