Comfort Comes from Below

The most impactful renovation in the Revitalize Home was air sealing and adding insulation to the basement – resulting in approximately 14% of the 30% in annual energy savings. Basements are also one of the easiest areas to access in most homes, and according to the Environmental Protection Agency (EPA), while many air leaks and drafts are easy to find because they are easy to feel (like those around windows and doors) holes hidden in attics, basements, and crawlspaces are usually bigger problems.1

Sealing these leaks will have a great impact on improving indoor comfort and reducing utility bills.


Interior Walls


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Rim/Band Joist


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Insulating Interior Basement Walls

Installing interior insulation in a basement is easily within the skill set of most do-it-yourselfers, and will go a long way toward turning a cold, damp basement into a dry, comfortable, usable room that can contribute to enhanced energy efficiency throughout the home.

In the Revitalize Home, we installed THERMAX™ Sheathing on interior basement walls. It is a fast and easy alternative to finishing a basement with studs, cavity insulation and drywall that:

  • Provides high insulation value (R-6.5 at one inch)
  • Resists moisture
  • Will not sustain fire
  • Installs with ease
  • Can be left exposed to the interior
  • Choice of facers for desired finish (bright reflective foil or white washable acrylic)

Another option for insulating interior basement walls is to use STYROFOAM™ WALLMATE™ Insulation with wood furring that is then covered by drywall.


Interior Basement Wall Insulation Project Option 1 Product List



THERMAX™ Sheathing or THERMAX™ White Finish

THERMAX™ Foil Tape

ENERBOND™ Professional Foam Adhesive

Interior Basement Wall Insulation Project Option 2 Product List




GREAT STUFF PRO™ Wall & Floor Adhesive

GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant

Insulating and Air-Sealing Rim Joist

The rim joist is a significant source of air infiltration and potential energy loss in the home. There are two ways to air seal and insulate this area. The preferred method is for a professional contractor to apply FROTH-PAK™ Foam Insulation*, a Class A foam that comes in an easy-to-use, portable kit that seals and insulates the rim joist.

A quick and easy alternative to using FROTH-PAK™ Foam Insulation in the rim joists is to “picture frame” an insulation board in the space using GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant* or ENERFOAM™ Professional Sealant.* Just cut a piece of insulation board to fit, then seal around the perimeter to secure it in place and block air infiltration around the edges.

An even easier option for air sealing rim joists is to use an insulating foam sealant such as GREAT STUFF™ or GREAT STUFF PRO™ dispense a 1” bead of sealant along joint/crack around the rim joist bay perimeter.


Rim Joist Project Option 1 Product List



FROTH-PAK™ Foam Insulation*


Rim Joist Project Option 3 Product List



GREAT STUFF ™ Gaps & Cracks Gaps & Cracks Insulating Foam Sealant*

GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant*

*Read the label and Material Safety Data Sheet carefully before use.

More information on the Basement project is available in downloadable format.