How To Repair A Rotted Roof Joist

Measure the dimensions of the old rafters beneath your roofing surface.

How to repair a rotted roof joist.

This part of. Keep in mind that the joist extends through the wall. Cut out the section of the roofing. Short videos and slideshow documenting our attempt at replacing rotten joists and flooring in a kitchen of a house we are currently renovating.

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. Put the new piece of wood in using screws that are twice as long as the thickness of the new wood. To replace the joist you need to measure the entire length.

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. However replacing the entire joist gives the home much better structural integrity. Removing termite damaged rafters and starter boards. The length also reduces the fulcrum effect so there shouldn t be any great stresses applied to the existing timber.

Use your tape measure to record the distance of both rafter legs. 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. The joist plate is bolted to the timber making the joint b as strong as the original joist. I replace the damaged wood and prep for the new roof installation.

The basics of the process are as follows. Remove an area of the roof shingles from the edge of the roof to the upper line of the overhang using a 16 inch nail bar and hammer to pull the roofing nails. Slide one of the newly cut rafter legs into position directly next to the old rafter. These plates are a quick and neat solution for joist ends that aren t going to be seen.