I am about to build (/have built) a single storey extension, with a 22.5 degree pitched roof abutting the existing house such that the ridge comes (just) below the first floor windows. Building Regulation Approval has been granted. The roof will be open vaulted, spanning between the ridge beam and wall plates. The ridge beam is supported by the end gable and an intermediate wall, but the drawings don't show how it is supported/fixed at the house wall?
1. Should rafters be fixed to the house wall and notched to take the ridge beam? If so, should the ridge beam just be nailed or maybe bolted to them.
2. Should the ridge beam be taken through the outer skin of the house wall (please no!), or maybe supported by a joist hanger, or nailed to a timber support fixed to the wall?
3. If the latter, should the first rafters be fixed to the wall or just to the ridge beam? At the other gable end, I assume the rafters would not be fixed to the wall (but a flying rafter will be built on noggins through the wall).
I would be grateful for any advice.
Thanks
John
1. Should rafters be fixed to the house wall and notched to take the ridge beam? If so, should the ridge beam just be nailed or maybe bolted to them.
2. Should the ridge beam be taken through the outer skin of the house wall (please no!), or maybe supported by a joist hanger, or nailed to a timber support fixed to the wall?
3. If the latter, should the first rafters be fixed to the wall or just to the ridge beam? At the other gable end, I assume the rafters would not be fixed to the wall (but a flying rafter will be built on noggins through the wall).
I would be grateful for any advice.
Thanks
John