Hi,
I am interested in boarding over part of my loft area, in order to increase the amount of storage space in our house. My question is concerning insulation. The joists on the floor of the loft are 3x2, thus if I put boarding directly on to them, I can only have a maximum of 3" of insulation (I think I should have a lot more ?!) Should I screw some lengths of 3x2 or 4x2 at right angles to the joists, place extra insulation in the spaces. and then board on top of these ? I know I will lose a small amount of height, and it will cost a bit more, but the house is a 30's semi (with no cavity walls) so I would like to get the loft fairly well insulated.
Would I also need to put in some form of damp membrane ? The roof is not felted, so there is quite a bit (!) of air flow through the roof space. I was not going to board over the complete area, so would it be ok to not put down a membrane on the warm side of the insualtion ?
Any comments appreciated..
Paul..