I'm just putting together some detailed drawings for the construction of my new porch. It's a front extension so needs to be thermally efficient. I've been reading the sample wall construction methods in the 'u value of elements' that the LABC publishes, and I can't really see much difference between the options.
Given that I'm making a room that's 4m x 1.8m, and expecting my walls to be about 300mm thick, and all I've committed to is that the outer leaf will be brick, what should I choose?
I'd be happy to pay a bit extra to make the wall 5cm thinner, but all of the options I see with a 50mm cavity rather than 100mm cavity all tend to have insulated plasterboard on the inside, the net effect being that you still have a ~300mm thick wall.
I intend using lightweight thermalites, because they're easiler to handle, good thermally, and seem to be pretty cheap, by the way.
Am I missing something?
Gary
Given that I'm making a room that's 4m x 1.8m, and expecting my walls to be about 300mm thick, and all I've committed to is that the outer leaf will be brick, what should I choose?
I'd be happy to pay a bit extra to make the wall 5cm thinner, but all of the options I see with a 50mm cavity rather than 100mm cavity all tend to have insulated plasterboard on the inside, the net effect being that you still have a ~300mm thick wall.
I intend using lightweight thermalites, because they're easiler to handle, good thermally, and seem to be pretty cheap, by the way.
Am I missing something?
Gary