Because driving nails up into the sheathing material will make things worse glue a piece of 1 inch rigid styrofoam to your piece of plywood.
Old roof new roof joined rafters fix.
This project requires two parts.
To avoid this there are additional pads on the connection phase with a base.
Strengthening can occur when the middle rafters have too much load that threatens to break the beam.
The new part of the roof system can be erected both above and below the old elements of the roof.
Then the beam or roof may sag.
Use your tape measure to record the distance of both rafter legs.
High enough to give room to nail the mid span cross tie at the desired location.
When repair is no longer an option the roof rafters must be replaced.
Notice the rafter spreader bolt.
Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions.
Measure the damaged area between your roof rafters or trusses.
Attach to the rafters using metal clamps or serrated plates.
First remove the rotten wood and then replace it with new rafters.
I e the original roof was a light wood shingle roof and the new replacement roof is a concrete tile roof weighing 5 or 10 times more than the original roof.
Repeat the process for the joist beneath your old roof rafter.
Measure the dimensions of the old rafters beneath your roofing surface.
The easiest way to straighten rafters is to jack them into position.
If a roof has been re roofed with heavier roofing material than the original roof was engineered for.
Move the jack in increments of one inch to allow for the roof to be able to move with it without cracking.
Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course.
Wood rotting from the inside out compromises the structural integrity of the rafter.
With the roof rafter pair straightened clamp new mid span cross ties in place and then nail the tie ends to the rafters.
Cut a piece of 1 2 inch plywood that will cover the area.