Fit the rafter into place between the boards and screw through the sister boards into the rafter.
How to replace roof rafters.
First one end then the other of the stretching tool is bolted to the pre drilled holes in a pair of opposing rafters.
Repeat the process for the joist beneath your old roof rafter.
Cut out the section of the roofing.
Hold the replacement against the end of the remaining rafter.
Measure the dimensions of the old rafters beneath your roofing surface.
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.
Screw the new rafter into place.
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.
Use your tape measure to record the distance of both rafter legs.
If replacing part of the rafter attach one end of each sister board through the existing 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.