Pests in your house are no fun, especially if they’re in your walls!

No one wants pests in their house, let alone in their walls! While mice or squirrels living in the wall makes for a hilarious comedy sketch, the comedy is quickly lost when you realize the setting is your very own living room. Here’s a list of the common pests with favorite insulation practices and how to safely get rid of them.


Bugs are a nasty pest you have to look out for. Unlike mice, they are not nearly as cute and fluffy! The attic is the best place to start looking for insect infestation in your insulation. Ants and termites will chew hundreds of tiny tunnels into the insulation, growing their nest as the colony expands. The new tunnels allow energy to pass through the insulation easily, undermining the intended purpose of the insulation.

This can cause mold, mildew, and moisture to seep into your home, poisoning your air. Bugs will also store food in their nests (aka, somewhere in your walls) attracting more pests, like mice and squirrels. Once insects have gotten into your insulation, the extermination of the bugs won’t be enough to make your home safe. Unfortunately, you’ll need to replace the insulation as well because the tunnels have defeated its function.


There are two types of people in this world: the ones who think rodents are cute and want to keep them, and the ones who do not. Regardless of which category you personally fall into, your insulation definitely appreciates owners who fall in the latter category. Once the weather gets cold, heated air pockets in your house’s insulation make an ideal nest for a house mouse or a skinny squirrel. How do you know if you’ve got a new roommate who didn’t sign a lease? Look (or listen) for the signs!

  • Droppings
  • Ripped up pieces of insulation in the vents
  • Scratching or scurrying coming from inside the house

While they may seem harmless with their big, beautiful eyes and tiny, scrunchy noses, wild mice and other rodents are extremely dangerous to have in your house. They carry diseases and germs that are often deadly to humans (remember it was rats that spread the Black Plague). Additionally, the excrement they leave in the walls is often poisonous to humans when left to ferment and pollute the air over time.  

Once you have rodents living in your walls the best course of action is to call an exterminator. If you don’t have unwanted four-legged housemates just yet, here are some good courses of action to keep pests out. We suggest securing your garbage at night, trimming branches that reach to the roof, and properly cover any possible entry holes such as missing shingles, attic vents, or foundation vents.

Spray Foam Insulation

Do you need to replace pest-ridden insulation or trying to make the best choice for insulating your new house? We suggest our spray foam insulation! Not only is the foam eco-friendly and healthier for you, but we also partner with Icynene, whose spray foam offers no edible or shelter value to pests. Call EcoComfort today to schedule an insulation consultation!