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Will Spray Foam Insulation Stop Mice

Regardless of whether you live in a new home or one built 100 years ago, odds are that you have had at least 1 mouse visit you. Maybe you didn’t see the critter, but the sound of its nails scraping on the floor and the unsightly droppings are a sure sign that you’ve been visited by a varmint.

House Mouse Origins

The house mouse is the most common type of small mammal in North America. It is a hungry and fearless creature that can do a lot of damage once inside a home. Common types of barriers can’t keep mice from entering houses, since they are known to chew through just about anything in their quest to reach their destination.

Mice are not native to North America. The rodents arrived from Asia during the American Revolution when shippers brought them over with supplies. The mice then spread from the sea ports further inland, following pathways of human migration. Currently, the mice are spread throughout North America.

Most house mice weigh less than an ounce and have a tail that measures between 3 and 6 inches on top of a 3 to 4 inch body. They come in shades ranging from light brown to black. Some have a lighter colored belly.

Mice live wherever humans live. They are attracted to food that has been dropped on the floor or not stored properly. Garbage and debris piles are also a draw. It is a myth that only dirty homes have mice. Mice will go anywhere there is food and since everyone has to eat, every home is a potential target for mice. Many will even feast on pet food. Mice see homes as an escape from predators and an easy source of food.

Will Spray Foam Insulation Stop Mice?

Getting back to the original question of whether or not spray foam will deter mice, the answer is both yes and no. Spray foam insulation is a great way to prevent further infestation, but it won’t get rid of mice already living in the home.

If you’re determined to use spray foam insulation to rid your home of mice, begin at the bottom and work your way up. Start with the foundation or crawl space. Install a layer of foam insulation to help prevent moisture from seeping in, which can cause mold and to prevent mice from getting in through cracks. Carefully inspect your home’s foundation from the outside, paying particular attention to where the wood connects to the concrete. Look for gaps and fill as needed.

A favorite entry site for mice is through plumbing pipes. Whether there’s a gap around the pipe or just an opening in the pipe itself, mice like to follow pipes into warmer areas of the home. Seal around pipes with spray insulation and put mesh screens over any openings to prevent mice from being able to get in. Use the same idea to seal electrical entrances.

While mice aren’t generally able to chew through spray foam insulation and they don’t like eating it, it’s a good idea to inspect it yearly to make sure there are no holes. Remember that spray foam exposed to sunlight is subject to damage, so check any exposed areas more frequently. The key to preventing mice from entering the building is to close, fill or cover any openings they may be using to gain entry. Spray foam insulation may not be a permanent solution, but it’s one of the best options available. For quotes on spray foam insulation, click on the link below.