Replacing Rotted Roof Joists

Different sizes are available to suit the joist section and the amount the joist will have to be cut back.

Replacing rotted roof joists.

Slide one of the newly cut rafter legs into position directly next to the old rafter. Use your tape measure to record the distance of both rafter legs. A new piece of timber is cut a to replace the damaged piece and the joists plates are positioned ether side of the joists with the end of the joist plate right up against the edge of the timber so it is the joist plate that site on the bearer a. A neat trick contractors do when dealing with dry rot is add another level to the floor joists.

The rotten timber should be removed first and the end of the joist treating to discourage any further rot. To repair a roof joist you will need to either replace the entire joist or use a spliced in piece of wood. However replacing the entire joist gives the home much better structural integrity. I used the same size board 2x6 and cut out one piece to replace the rotted piece.

Keep in mind that the joist extends through the wall. How to replace the rafters without removing the roof. I used 3 screws in this case i also put a nice little bit of glue between the new piece and the other joist for more gripping strength. These plates are a quick and neat solution for joist ends that aren t going to be seen.

The joist plate is bolted to the timber making the joint b as strong as the original joist. Measure the dimensions of the old rafters beneath your roofing surface. If you feel like the new joists you put in need more integrity you can add vertical boards. Put it on both ends of the joists.