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Building Inspector prefers the first option of the 200mm corner. So of the 150mm cavity, 100mm block. He also said I would need to "insure i have damp and thermal protection in place". I'm guessing that's a 100mm strip of 50mm insulation CW4050 (or a cut in half CW4100 as being used) to fully...

Thanks for the suggestions. I have asked the building inspector if this would be ok.

The SE drawings show what I am describing. SE is away this week which is a shame. Inner wall is thermalites. Outer wall is concrete blocks. The house is bath stone with quoins. The wall is a few courses high. Not the end of the world to remove blocks if needed. I cant ask BC. Ive already...

Hi My house has a ~2" cavity. The new extension has a 6" cavity. The inner leaf of the extension has been made with a wall starter on the house wall. The external leaf on the extension basically touches the corner of the current house. How can the the external leaf be fixed to the house...