Pull the old rafter end away from the roof eave.
How to replace roof rafters.
Hold the replacement against the end of the remaining rafter.
Hardware details of the roof expander.
If you are replacing the entire rafter screw down into the wood through the top and bottom joists.
Make two lines on the side of the replacement rafter end and the end of the rafter 1 inch from the top and bottom edges.
As work progresses hanging the roof sag remover tool from one of the new collar ties already in place eases holding it in place for bolting.
First one end then the other of the stretching tool is bolted to the pre drilled holes in a pair of opposing rafters.
Cut out the section of the roofing.
If replacing part of the rafter attach one end of each sister board through the existing rafter.
Measure the dimensions of the old rafters beneath your roofing surface.
Screw the new rafter into place.
Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions.
Fit the rafter into place between the boards and screw through the sister boards into the rafter.
This is where your wooden dowels will insert into the wood.