Do-it-Yourself Polyurethane Foam Insulation

Polyurethane foam insulation fills up cracks and voids in walls and around windows, cutting down on drafts and increasing the energy efficiency of a home. You can buy this product in convenient spray cans at any home improvement store, or for larger jobs you can rent more heavy-duty equipment that dispenses polyurethane foam insulation from a reusable pressurized tank. Be aware of the expanding qualities of this product, so you can use just the right amount and avoid waste.

Things You'll Need

• Utility knife

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Instructions

1. • 1

     Insert the nozzle of the spray can or hose into the space between a window frame and rough opening, between ceiling joists, into wall cavities or any other location where heat is being lost from your home.

   • 2

     Apply enough polyurethane foam insulation to fill approximately half of the area. As the foam expands, it will completely fill the void before hardening and becoming permanent.

   • 3

     Leave the foam for 24 hours to cure completely. Slice off any excess foam that is protruding from the wall cavity using a sharp utility knife.