Take the replacement board fit it in place image 2 and nail it in with a hammer using galvanized nails.
How to replace cedar siding board.
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The courses should overlap by at least 1 in.
To install the replacement siding start at the bottom and work your way up.
The usefulness of cedar for exterior applications such as siding and fencing is due to its exceptional weather resistance but over time even cedar siding can be damaged from exposure to moisture and ultraviolet uv rays.
Attach the siding with 10d galvanized box nails driven into the overlap at least 1 2 in.
Install the same type of nails as those used for the original siding to retain.
Replace damaged siding boards or shingles and reinstall the undamaged siding if you are not installing new siding.
Be sure to nail into the existing holes on the adjacent siding.
When you replace the boards use a homemade reveal set jig to match the reveal of the existing siding.
You can use a tape measure to mark the reveal of each piece of replacement siding or make a spacer gauge from two blocks of wood screwed together.
Moreover insects and birds can bore holes and moisture can cause boards to warp and crack.
Nail straight down on the replacement board in order to hit studs.
Once all the nails are removed from the adjoining board the damaged one should just pull out.