Mice are not getting in through the front door, and they are almost never getting in through a hole anyone has noticed. Four openings account for most of the entries we seal.
The dryer vent
The flap sticks open, or the sleeve has pulled back from the wall. Both leave a clean run into the joist bay.
The sill plate
Where the frame meets the foundation there is often a gap of a few millimetres, running the length of the house.
The garage door corners
The seal wears at the two bottom corners first, and a garage is usually one uninsulated wall away from the living space.
Utility penetrations
Cable, gas, water and air-conditioning lines are drilled oversized and sealed with foam, which mice chew through in an afternoon.
