Why does spray foam insulation interfere with termite control?
Spray foam insulation unfortunately provides termites with a dense, spongy place to build their colonies, and it is very easy for them to tunnel through. It does not attract termites, but it does provide them a nice home if they find it.
Homes ravaged by termites hidden behind spray foam insulation
According to the pest control operator who provided the Fox 5 I-Team with video of this case, the spray foam in this two-year-old house is now home to termite tunnels going 15 feet up.