Do it Yourself Wall Foam Insulation
- Determine what R-value rating is best for your location. You can check the United States Department of Energy map for that information. Typically foam insulation ranges between R-4 and R-8 per inch of thickness.
Next find a product that meets the R-value you need. Take into consideration whether this is for a new building or an existing one. If you are adding insulation to an existing building, the type and application process is slightly different.
Consider whether you want eco-friendly foam insulation. More companies are offering that as an option.
Calculate how much foam you need in square feet. Remember to allow extra to cover any mistakes you might happen to make. - Set up your foam insulation canisters. Be sure you understand the process of applying the foam insulation before you begin.
Drill holes in the exterior sheathing of an existing structure to install foam insulation. For new construction, you can skip this step.
Assemble your gloves and safety glasses to wear while you install foam installation. - Insert the nozzle for the spray foam into the holes in the sheathing. Allow foam to fill the interior crevices. Remember the foam insulation expands as it sets. Make sure you don't overfill. Plug the holes in the sheathing and cover with siding.
Spray insulation around the perimeter of one section of exposed studs in new construction. Then fill in the area between the studs with foam by spraying the insulation on the sheathing. Allow room for the expansion of the foam as it cures.
Add more foam to fill the entire area between the studs if necessary. Or you can lay down a thin moisture barrier of foam between the studs and then add a layer of fiberglass insulation between the studs.
Trim the excess foam with a sharp knife. Continue applying foam insulation between each stud until the project is complete.
