Old Roof New Roof Joined Rafters Fix

Attach to the rafters using metal clamps or serrated plates.

Old roof new roof joined rafters fix.

With the roof rafter pair straightened clamp new mid span cross ties in place and then nail the tie ends to the 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. However the trick to this process is to do it very slowly so it may take a few weeks before you get the rafter into a position where it is straight again. Then the beam or roof may sag.

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. To avoid this there are additional pads on the connection phase with a base. Wood rotting from the inside out compromises the structural integrity of the rafter.

Cut a piece of 1 2 inch plywood that will cover the area. Measure the damaged area between your roof rafters or trusses. Repeat the process for the joist beneath your old roof rafter. This project requires two parts.

The easiest way to straighten rafters is to jack them into position. 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. First remove the rotten wood and then replace it with new rafters. Remove two shingles to each side of the new valleys until you reach the bottom.

Use your tape measure to record the distance of both rafter legs. Measure the dimensions of the old rafters beneath your roofing surface. 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. Save those old shingles and number them for replacing later.

When repair is no longer an option the roof rafters must be replaced. Notice the rafter spreader bolt. Strengthening can occur when the middle rafters have too much load that threatens to break the beam.