09/02/2026
Can mice get in through your outdoor light fixtures?
Yes. And it's the one spot almost nobody checks.
This customer was hearing them in the ceiling. I walked the whole
house, checked the foundation, checked around the pipes. Nothing.
Then I looked up at the light.
Unsealed. Wide open straight into the ceiling.
That's all a mouse needs.
I filled it with expansive foam, pushed it as far back as it would
go, and matched it black to the fixture so you can't even tell.
Go look at your light fixtures tonight. If you can see a gap around
the base, that's a door.
I see this all over Guelph, Kitchener, Waterloo, and Cambridge.
Message me if you're seeing this at your place.