How to insulate a bedroom wall that is below grade (below windows)

It is the low floor of a split level.In a partially finished basement 20ft/20ft, and under the carport with acoustic tile ceiling and 2 hvac ducts.

  2 answers
  • Oliva Oliva on Jul 03, 2018
    Cork is good as acoustical insulator, in ceiling. Depending on your winter temps, use insulation with necessary R value, or higher. If you have condensation in the lower level, you'll have to address that, first. If hvac ducts are at ceiling level and you have 8' or higher ceiling, install a good ceiling fan with reversible blades and 16° pitch to move more air. You can also add magnetic vent covers to direct heat down, in winter.

  • Jerry Jerry on Jul 04, 2018

    Same in my home. I used 1" styrofoam installed with construction adhesive. (I should have used 1.5") Don't skimp on the adhesive. Then I reinstalled the paneling using the same glue/adhesive. The hard part was trimming around the windows and any areas where the foam edges showed. Just come up with a molding or other idea that works. I didn't have electrical outlets to worry about on the exterior wall so that wasn't an issue.