Replace Roof Top Plate
Cut new lumber to the length of the rotted studs.
Replace roof top plate. With trusses it is possible to prefabricate the pieces needed into modular frames that can be installed every 24 inches to frame a roof with much less time and trouble. I was able to find an area on both ends where the damage stops. Then replace with studs not another header. The second joist should still be 600mm to the center and so on so that the plasterboard.
In traditional framing the roof is built stick by stick. When constructing a gable roof the ceiling joists are laid out slightly differently. Gable roof plate top layout. If the new stud is too short it will not support the plate and roof.
Matching the exact length of the studs is vital. The national average cost to replace a roof is 7 211 with most homeowners spending between 4 707 and 10 460 roof installation cost ranges from 400 to 550 per square depending on the roof size and materials used in reroofing. Amazon link to dewalt framing nailer kit we use. Expect to spend 1 500 to 3 000 to remove your current roof before installing a replacement.
The picture below shows the ceiling joist starts 50mm away from the brickwork gable wall. Https amzn to 2biespt it s a 20 volt max xr lithium ion battery cordless brushless 2 speed 33 degree frami. There are two 2x4 stacked on top of each other and i think there called top plate or upper wall plate. The connection between the trusses and the wall top plate is essential to the strength of your new roof.
This is to let the common rafter fit in between later. Rotted ledger boards or sill plates must be replaced to prevent structure failure. Both boards seem to have some damage and should be replaced. This is a hip roof design and it looks like i should be able to get to it in the attic if i crawl out to it.
I would cut the header first then the bottom of the top plates between the studs and then the top plate about 2 longer on both sides so you have an overlap. Support the ceiling joists and don t try to raise it since movement there could damage the roof above esp the flashing.