Repairing Rotted Roof Rafters

Cut a piece of 1 by pressure treated lumber that is longer than the replacement board by 4 to 6 inches.

Repairing rotted roof rafters.

Apply a resilient weatherproof coating to the new pieces then secure them using stainless steel nails. Rotted wood rafters in a roof are a serious issue. Cut a replacement board from 2 by pressure treated lumber that is the same size and width as the rafter tail you just cut using a circular saw. To do this you will need to cut a slot into the existing truss rafter or joist in a u shape to the required length of the threaded steel bars in the new section of timber.

The new section of timber is now put in place with the threaded steel bars sitting in the slot. Use your tape measure to record the distance of both rafter legs. Replacing rotted rafter ends on a gable roof is a matter of removing the existing ends and installing new wood. Remove weak spongy wood preserve and protect wood wi.

Although it is a straightforward process it is necessary to take your time to ensure a solid repair. Step 1 place a stepladder or extension ladder under the rafter end with the most damage. Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions. Measure the dimensions of the old rafters beneath your roofing surface.

To be on the safe side apply a waterproof wood sealant to the other rafters to protect them as well. Always use a blade guide when working with a circular saw. Cut off the rotted rafter tail with a reciprocating saw. Start by prying away the bottom and sides of the old eaves and cutting new materials to match.

Cut out the section of the roofing. Keep your fingers away from the blade at all times. Slot cut out in existing timber. Fortunately repairing rotten or weathered eaves is a relatively simple project that you can do yourself without ever having to climb onto your roof.