Replacing Rotted Roof Joists

If you feel like the new joists you put in need more integrity you can add vertical boards.

Replacing rotted roof joists.

These plates are a quick and neat solution for joist ends that aren t going to be seen. Put the new piece of wood in using screws that are twice as long as the thickness of the new wood. Measure the dimensions of the old rafters beneath your roofing surface. However replacing the entire joist gives the home much better structural integrity.

Slide one of the newly cut rafter legs into position directly next to the old rafter. To replace the joist you need to measure the entire length. Use your tape measure to record the distance of both rafter legs. Different sizes are available to suit the joist section and the amount the joist will have to be cut back.

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. The joist plate is bolted to the timber making the joint b as strong as the original joist.

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. To repair a roof joist you will need to either replace the entire joist or use a spliced in piece of wood. How to replace the rafters without removing the roof. Keep in mind that the joist extends through the wall.