Gary Martin

Cavity for weather protection. Surely if insulation is held tighter against internal skin, there is no gap to slow condensation, also the celotex acts as a secondary vapour barrier to supplement a fully sealed one. any moisture in the blocks could dry out via the ventilated cavity. ? ps MVHR system will also be fitted. thanks for your comments gary

Just received PP to demolish a part Q agricultural building and build a smallish bungalow. In Cornwall im still debating construction methods. Any suggestions? got electricity for £10k and water for £10 k septic tank planned for sewage. gary

Could I build a new house with 50 mm uninsulated cavity block walls, with, say, 100 mm of celotex/ kingspan fixed to the inside walls, then service battens,vapour barrier, plasterboard and skim. would it pass building regs ?