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Stop Drafts—and Mice!
Plugging holes on the exterior of your house with foam is a great way to stop air infiltration, but it may not keep out pests. Mice can and will chew right through regular expanding foam, but there are formulas that stop insects and rodents. So the next time you plug exterior holes, choose foam labeled to resist pests. Plus: This is how you should NOT use spray foam at home.
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Add an Extension Tube
The short, stiff straw on cans of expanding foam makes it difficult to reach some areas. The solution is to buy a length of 1/4-in. tubing at the home center and use it to extend the straw. With this setup, you can reach almost anywhere. Be sure to keep the tube clean.