Yes we have added concrete tiles, and the rafters are circa 2.85m in length. I agree about the middle sistering issue. Ideally we would have completely re-roofed and simply added full length rafters from the outside, but we havent so we cant see a sensible way of doing this without pulling...
@catlad We've just had new (heavier) tiles added to this section and they chap who fitted them suggested we add stronger rafters, as they felt a bit bouncy and are bowed. The existing rafters are 3" by 2"s, he suggested getting 4" by 2"s and sistering them.
Do you mean the ridge board at the top? I've not heard of hangers off of existing rafters. If you mean from the ridge board, the issue would be that the breeze blocks beneath sit quite far forward from the ridgeboard at the top. So a hanger wouldnt sit flush (just my thoughts thought based on...
Help please, we're struggling to find answers. All advice welcome!
DIY Plan - Support the original rafters (in pic) and add new straight (as possible) timbers for plasterboard to fix to.
Problem: There is about an inch and 1/2 bow in the middle of the rafters (along and across).
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