We get a few mice in our house every year, especially fall when the weather
starts getting colder.
Over the past couple years, I've spent hours going around the perimeter of
the house at ground level, reaching up under the siding, filling gaps, as
well as filling all gaps around doors and windows and anyplace wiring enters
the house, I've made sure the dryer vent has no holes in it, etc. The mice
keep getting in. Now I'm thinking they must be climbing up high to enter the
house somewhere. When standing on the ground and looking up at our brick
chimney, which butts out from our siding, I can see a few small gaps about
15 feet up, where the siding meets the brick. In the past, I never bothered
to get a ladder and fill those because I figured it was unlikely that mice
would just happen to climb our chimney, wander around and find those gaps.
I'm going to climb up and fill those gaps, but it got me wondering, how
likely is it that mice will climb up 15 feet to find a hole to enter a
house? I know they theoretically can climb bricks and rough surfaces, but
is it likely that 6-8 mice a year happen to be climbing our house's chimney
and find these gaps? When we've called professional pest control people and
asked them, we get mixed answers. Most say when they try to mouse-proof a
house, they concentrate on finding holes at ground level and around doors,
windows, and where wires/pipes enter the side of the house. Twoof the pros
we called said that to mouse-proof your home, you have to fill gaps all
over the outside of the house, all the way up to the roof, but they also
wanted an outrageous amount of money to do that so I'm not sure if that was
a ploy to get more money out of us, or if it was true.
When I look at where the bricks from the chimney meets the siding at a
90-degree angle, there is a line of grout/mortar that goes straight up that
corner, and it is a slightly rough, pebbly surface, so it is probably
possible that mice could grip it with their claws. And that straight line of
grout goes right by those gaps. So I'm thinking that's where the mice are
getting in ... but is that very likely?
Has anyone else found that mice were scaling brick walls and getting into
their house from high above the ground?