If the hole happens to be very large cut the cavity into a square.
How to patch woodpecker holes in cedar siding.
Filling woodpecker holes in wood siding.
Repairing large holes in cedar siding is a little more involved.
Use a putty knife to apply the putty liberally across.
When you fill woodpecker holes or blemishes in siding or other wood surfaces the type of wood plays a factor.
On a warm day mix the two materials with a putty knife then spread the mix over holes in the siding until the opening is completely covered.
Just as with the small holes above fill the cavity with spray foam insulation to get a tight weatherproof seal.
Scrape away any excess with the putty knife when you re done and allow it to air dry.
How do i repair woodpecker holes in wood siding.
Unfortunately cedar siding seems to get a lot of damage from woodpeckers particularly if the house is adjacent to a wooded area.
Use a putty knife to force the filler inside the hole making sure to fill in the hole and to completely cover the opening.
Smear a generous layer of the epoxy putty over the holes.
Step 2 prepare the backing.
Use the putty knife to scrape away the excess then.
Large holes like you are describing sound like roosting or nesting holes.
Step 1 save sawdust.
Mix up a batch of lightweight structural adhesive epoxy putty on a scrap board.
Use a hole saw to make a perfectly circular hole over the existing hole.
Step 5.
Scoop out a golf ball size glob.
Epoxy putty is a commonly recommended wood filler for use in repairing woodpecker damage.
Fill the siding holes with wood filler.