Remove the shingles over the area of the rotted roof decking identified previously.
How to repair rotted roof plywood.
Climb up and walk carefully onto the roof.
How to fix rotten wood on a roof.
Look up at the roof.
Cut off the blister or peel it completely back until the damaged laminate is flush with the main board.
Sand the edge of the cut until the edge tapers onto the surface of the underlying laminate.
Set up a ladder at an even location on the ground next to the home.
That s not going to get a lot of movement.
But plywood ends to be pretty flexible and this is better used on something like a rotted windowsill.
Gain access to the attic to inspect the plywood or roof decking.
If the plywood is in fact what s rotted it s really so easy to replace that that it s not worth patching it.
Cut off blistered or peeled laminates from the main board using the router.
Remove the rotten wood.
Locate nails that hold shingles.
Locate the rotted roof decking.
Replace the roof decking.
How to fix rotted roof decking 1.
Use extreme caution as you.
Locate dry rot roof damage.
If you re only replacing the portion of the roof with damage you need to find out the extent and location of that damage.
How to replace rotted roof plywood sheathing.