New build extension nearly finished. Need to insulate the newly built loft space. It's a traditional tiled pitched roof, nice storage space and possible train set play space for my young son. It was a hand built roof with 5 x2 inch rafters making the loft floor and also the sloping rafters. When it comes to insulation I know I need more then just the 5 inches in the floor and I don't really want to add 6 inch high cross beams and then floor on top of that as I will lose too much height.
We have very good ventilation currently too, the loft is actually quite breezy. Eaves ventilation all the way down each side and ridge ventilation all the way along too.
Would it be possible, feasible and allowed by the regulations to have 4 inches of wool in the loft floor, with a 1 inch air gap and then floor boards. And then to have the remaining thermal insulation requirement as Kingspan type boards on the sloping kart of the roof?
I don't see why not as from the room below the loft you would effectively have the right amount of Insulation for regs. It would also make the actual loft space quite comfortable and ideally reduce the breeze and draughts.
We have very good ventilation currently too, the loft is actually quite breezy. Eaves ventilation all the way down each side and ridge ventilation all the way along too.
Would it be possible, feasible and allowed by the regulations to have 4 inches of wool in the loft floor, with a 1 inch air gap and then floor boards. And then to have the remaining thermal insulation requirement as Kingspan type boards on the sloping kart of the roof?
I don't see why not as from the room below the loft you would effectively have the right amount of Insulation for regs. It would also make the actual loft space quite comfortable and ideally reduce the breeze and draughts.
