Finally… warmer weather and our guys can go out and spray foam insulation in above freezing temperatures! Here David sprays foam to create a perfect insulation job around wiring. Does spray foam harm the wiring? Absolutely not! We just ask that the wiring is properly secured in the wall to keep the expanding foam from pushing it outward. See that PVC drain pipe in the lower left of the picture? It’s about to get foam insulation behind and around for the best insulation job possible.