Rotten Roof Joists

Why i didn t choose a scarf joint joist repair a few reasons added up.

Rotten roof joists.

The best thing to do is mark your joists that are to be removed. It means removing quite a bit of timber that isn t rotten including the edge moulding. You want to cut about 6 inches past where the rot ends just to make sure no more moisture will get through. Paint can hide wood rot so poke the siding with the tip of the.

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. This part can be a little hard depending on what wood you are working with. Pressure treated stuff won t let the water flow through the wood as well as straight regular wood. If your home has wood siding examine the siding around and beneath the windows for signs of swelling or discoloration.

This will make sure that dry rot that isn t visible won t sneak up on you. Wood rotting from the inside out compromises the structural integrity of the rafter. Just to be safe we re going to cut the joists at least 4 inches away from the rotten spots. Then just cut off the marked joists.

Basically the idea is to cut the ends off and affix a new piece of timber to the wall. You can go for 6 inches if you have space. 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.