Underfloor means the floor above an unheated crawl space or basement. Once the underfloors are properly insulated, you will increase the overall comfort of your home because floor insulation provides valuable sound control and thermal control.
The procedure for installing floor insulation is similar to installing ceiling insulation. Follow the installation tips below to ensure that you do a professional job.* It's a good idea to wear a work helmet when you're installing underfloor insulation. This can help you avoid injuring yourself on exposed framing members such as floor joists, exposed nails and other hazards. Refer to our complete list of Safety Tips for more important ways to protect yourself while installing insulation.
Make sure you are using insulation with the most appropriate R-value. Our R-value Estimator in the Site Toolbox can guide you. Click on the product links below to learn more about the JM insulation products you can use in underfloor applications.
ComfortTherm® insulation is a lightweight, thermal and acoustical insulation made of long, resilient glass fibers bonded with an acrylic thermosetting Formaldehyde-free™ binder.
JM's Kraft-Faced Batts & Rolls are made of naturally white, Formaldehyde-free™ fiber glass, reducing environmental concerns including the risks of poor indoor air quality and the effects of manufacturing on the environment.
JM's Unfaced Insulation is a lightweight thermal and acoustical fiber glass insulation made of long, resilient glass fibers bonded with an acrylic thermosetting resin made without formaldehyde.