I would suspect wood worms. We have had a similar problem. Woodpeckers have
good hearing and can hear the larvae as they are munching through the wood.
We had to treat the wood with Bora Care to kill them.
Hilke Breder
Brattleboro

On Mon, Oct 26, 2015 at 12:28 PM, David Gusakov <[log in to unmask]> wrote:

> A friend reports seeing a woodpecker (downy or hairy) making holes in her
> new garage wall,
> over a period of a couple of weeks.
> They go all the way through the wall, resulting in openings from penny to
> half-dollar size.  She
> says there is no rot or any insect life in the walls.
>
> Any ideas of what's going on, or how to stop it?
>
> David Gusakov
>