Repairing Rotted Roof Beams

Wood rotting from the inside out compromises the structural integrity of the rafter.

Repairing rotted roof beams.

The basics of the process are as follows. The rotten joist end is cut off and an angle cut is made to bottom of the beam to allow a new part to be bolted on a good distance from the fulcrum point. It s a traditional repair is low cost and can be finished to match the original joist. First of all it ruins the unique original architecture.

Rotted wood rafters in a roof are a serious issue. Second depending on the amount of dry rot cutting back too far can lessen the structural capacity of load bearing roof beams. No need to scrap good beams no need for extensive buildings works or opening up. Why i didn t choose a scarf joint joist repair a few reasons added up.

Inspect and assess the damaged section of timber and determine where it needs to be cut to prop the timber along it s length using suitably sturdy props such as acro props once supported cut off the damaged end leaving only solid un damaged timber now. Commonly what you can see of the rotted wood is only part of the problem it is what you cannot see under the surface of the wood that can be the main issue. Rotted beams can have new ends or mid sections made by us as timber resin splice kits or you can buy the resins and bars separately to make your own repairs. This video shows from start to finish the repair of rotted endbeams on a house using the endrot system.

Using a pry bar gently pry the beam loose from the ceiling. When repair is no longer an option the roof rafters must be replaced. Fortunately repairing rotten or weathered eaves is a relatively simple project that you can do yourself without ever having to climb onto your roof. Make a cut in the center of the beam while a helper holds the two pieces into place.

Cut through any nails at the points where the beam is attached to the surrounding framing. Remove weak spongy wood preserve and protect wood wi. Start by prying away the bottom and sides of the old eaves and cutting new materials to match. Apply a resilient weatherproof coating to the new pieces then secure them using stainless steel nails.