I have a 1930s semi and keep having a problem where the cement under the ridge tiles keeps falling out and pigeons come in and poo all over my stuff
The bottom of the rafters are nailed to the top of the wall plate. About 1/3 of the way up they are bolted to the top of our dormer roof. 1/2 way up they sit on a beam and I think this is where the problem starts.
In the front half of the house the beam is supported by two trusses. The beam is straight and the rafters are fine. The back half of the beam has no support and it has bent quite a bit, the rafters have dropped and a gap has opened at the top under the ridge tiles.
The tops of the rafters butt up to a wooden plate bolted to the wall. The rafters are nailed to this plate. The ones on the bent bit of beam have slid down this plate and the nails have pulled out. The ends have quite a bit of flex and I think the movement is causing the cement to crack.
I'd like to take the movement out and stop the rafters sliding any further. What's the best way to do this? Are there any angled joist hangers I could retrofit? I've also got lots of c24 floor joists that I could bolt to the wall underneath the bottom of the rafters so they can't slide further if that would work?
The bottom of the rafters are nailed to the top of the wall plate. About 1/3 of the way up they are bolted to the top of our dormer roof. 1/2 way up they sit on a beam and I think this is where the problem starts.
In the front half of the house the beam is supported by two trusses. The beam is straight and the rafters are fine. The back half of the beam has no support and it has bent quite a bit, the rafters have dropped and a gap has opened at the top under the ridge tiles.
The tops of the rafters butt up to a wooden plate bolted to the wall. The rafters are nailed to this plate. The ones on the bent bit of beam have slid down this plate and the nails have pulled out. The ends have quite a bit of flex and I think the movement is causing the cement to crack.
I'd like to take the movement out and stop the rafters sliding any further. What's the best way to do this? Are there any angled joist hangers I could retrofit? I've also got lots of c24 floor joists that I could bolt to the wall underneath the bottom of the rafters so they can't slide further if that would work?