Interior Basement Insulation

Interior Basement Insulation

Insulate for a Better Basement

Whether it’s being used for livable space or just storage, a well-insulated basement is an important part of protecting your building envelope. Designed for both unfinished and finished applications, DuPont insulations and air sealants add energy-efficiency and warmth to any basement.


Unfinished Basements

When insulating an unfinished basement, use a DuPont finished insulation choice.

DuPont rigid insulation comes with what’s ideal for unfinished interior basement walls.


Finished Basements

When insulating interior basement walls in a finished basement, use our Styrofoam™ Brand Insulation.

Styrofoam™ Brand Insulation is a rigid insulation that can be placed directly on walls, framing and drywall.

  • Creates a finished appearance
  • Allows spacing for electrical wiring and other utilities

Rim Joists

Insulating and sealing your basement’s rim joists prevents heat loss and protects against moisture and unwanted pests. Click here to learn more about rim joists.

Froth-Pak™ Foam Insulation is a class A foam that comes in an easy-to-use, portable kit.

  • Helps block entry of unwanted air, moisture, insects, dust and noise
  • Can help lower heating and cooling costs
  • Can be left exposed without a thermal barrier

Thermax™ Sheathing or Styrofoam™ Brand Extruded Polystyrene Foam Insulation offers a quick and effective alternative for insulating and sealing rim joists.


Concrete Slab

Insulating over slabs helps reduce the potential for condensation or “sweating”, reduce energy loss and increase the warmth of the homeowner.

Enhance energy efficiency and moisture resistance using Styrofoam™ Brand Rigid Foam insulation both under and over slab.