Q Can you tell me why snakes come into a house? We've found them in the basement. What can we do to prevent this?
A When it's hot outside, snakes are active and seek out cool, moist shelter. The typical Minnesota basement is very attractive to them. Often they enter through cracks, gaps or even mouse holes in the ground next to the foundation.
Do you have heat ducts under the basement floor? The problem with this common and relatively recent building practice, called transite heat, is that some ducts aren't built tightly or don't stay tight over time. Insects, mice and the snakes that feed on them could enter the ducts.
Another possible entry site is the sump pump or drain tile. Make sure these areas aren't open to the air. Tile that drains from an open end should be covered with 1/4-inch hardware cloth. Clean debris from this cover routinely.
The same cloth can be placed over other openings to the basement, including furnace combustion air intakes, dryer vents, etc.
Seal cracks or holes in the foundation or the ground near it, and in sidewalks, driveways and retaining walls. Use mortar, sealing compound or wire mesh where appropriate.
Make sure basement doors and windows are shut and that they seal tightly when closed.
There are no chemical repellents for snakes. Some people report success with various home remedies, including mothballs, sulfur, tacky bird repellent, lime, cayenne pepper, coal tar and creosote. None of these effectively repelled snakes in a University of Nebraska study.
