Now I need all the good tips and ideas you might have. I bought a cabin built in the 70s where 3 roof trusses have sagged; this is in the main area of the cabin where the span is about 5m. The ceiling sags up to 5-6 cm at most.
Yes, the outer roof has sagged as well, of course; see pictures, but I think it can be raised to the correct level when we lay the new roof.
Now we are going to replace the roof and plan to try to correct this. According to the previous owner, the trusses sagged a few years after the cabin was built, and it has looked the same since then.
My question is then, the idea is to place joists on the floor inside and prop up the ceiling, any tips to consider? Do you think the trusses need to be reinforced somehow?
I would be super grateful for all tips and thoughts!
Yes, it will be new sheet metal, I mean, the outer roof should be possible to adjust when you frame it, that is, brace it to the correct level, but how do I get the inner ceiling in shape?
No, I'm not sure, I'm supposed to get some help with this in 2 weeks, but I thought it would be good to get some tips here since we will be short on time and the cabin is 400 kilometers away from home. How can I tell if it's the exterior wall?
Personally, I would have completely ignored if the ceiling sags a little. That's how it looks in almost every older house. But if your fingers are itching, you can tear down the ceiling and straighten it out in the same way you plan to do with the roof!
If I measure from floor to ceiling inside, it is 228cm in most places, but in the middle of the ceiling where it hangs, it is 222cm. However, if I measure outside by the window at the same rafter, it is 227.5, meaning it seems to have settled only in the middle inside.
Is it completely crazy to think like this:
Lay out joists over the floor to spread the weight, place supports under the 3 roof trusses where the roof hangs, cut off the "side braces" on the trusses, then press up to the okay height and nail new side braces on the truss, in this way one should be able to correct the worst sagging in the ceiling?
Clear out the attic so you can see what you're doing; the rafters might have hidden joints in the insulation that have slid apart.
Otherwise, your suggestion sounds good.
Possibly too few or the wrong nails in the rafters.
Clear insulation and take more pictures so we can respond better.