by Teresa Mears
This includes openings around the foundation, especially entry points for wires and pipes. A spray can of foam, which you can buy for about $6, will handle most holes.
To prevent insects from getting into your house, you should keep moisture away from the foundation and eliminate sources of standing water, according to the National Pest Management Association. Termites cause $5 billion in property damage every year in the U.S., according to the NPMA. These destructive insects need moisture to survive, which is why the NPMA advises fixing leaking faucets, pipes and air conditioning units; repairing fascia, soffits and rotted shingles; trimming tree branches away from the house and replacing weather stripping around windows and loose mortar around basement foundations.