DIY Doctor UK DIY Forums

I have an external doorway in a pebble-dashed 9 inch brick wall which I would like to fill in. Would I have to comply with current insulation regulations for this short piece of wall or can I just fill in with 9 inch blocks and plaster and render afterwards??

Thanks. . .

yes, its best to insulate it anyway its for your benefit

Thanks for your interest - so are you suggesting say 3 inch blocks 2 inch cavity and 4 inch studwork with something like Jablite between??

Seems the thinnest drytherm is 50mm - meaning there would be no cavity with 75 and 100mm blocks - as the total width would roughly add up to the thickness of the wall.

I suggested stud on the inner skin as it would probably be quicker to put up and the insulation could be put between the studs and there would be a cavity between. . .

sorry I must have been half asleep writing this, I didn't read your problem properly, it would best to build your doorway in thermalite but lay them flat. As your existing walls are 9 inches thick with no cavity then its pointless creating a cavity for the doorway

That sounds completely logical - Thanks for your help. . .