Get Fix Sagging Roof Between Trusses Gif. In many cases, you'll need to fix sagging trusses or rafters to repair your roof. From the inside, there doesn't appear to be any water damage or rot.
I pitched the roof 3 in. A ridge that droops in the middle (forming that unintentional western design feature). Cut a piece of 1/2 inch plywood that will cover the damaged area that exists, between two rafters or roof trusses, see.
If that's what you're after measuring the damaged area between your roof trusses or rafters, cut a piece of 1/2″ plywood.
If your roof is more than 30 years old. Short timber noggings between trusses are roofing battens should be fixed securely to all truss top chords in accordance with as1684 unless otherwise specified by local building regulations. If the roof sags between the rafters or trusses, the most likely cause is sheathing that's too thin for the area it covers. I said that the floor trusses were heated until they sagged, then they pulled away from the walls.