Cut a piece of 1 2 inch plywood that will cover the area.
Old roof new roof joined rafters fix.
First remove the rotten wood and then replace it with new rafters.
Measure the damaged area between your roof rafters or trusses.
Attach to the rafters using metal clamps or serrated plates.
If a roof has been re roofed with heavier roofing material than the original roof was engineered for.
Wood rotting from the inside out compromises the structural integrity of the rafter.
Measure the dimensions of the old rafters beneath your roofing surface.
High enough to give room to nail the mid span cross tie at the desired location.
Move the jack in increments of one inch to allow for the roof to be able to move with it without cracking.
The easiest way to straighten rafters is to jack them into position.
Then the beam or roof may sag.
Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions.
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.
The new part of the roof system can be erected both above and below the old elements of the roof.
Strengthening can occur when the middle rafters have too much load that threatens to break the beam.
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.
To avoid this there are additional pads on the connection phase with a base.
Repeat the process for the joist beneath your old roof rafter.
Use your tape measure to record the distance of both rafter legs.
When repair is no longer an option the roof rafters must be replaced.
Remove two shingles to each side of the new valleys until you reach the bottom.
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.
Save those old shingles and number them for replacing later.
This project requires two parts.