Skip to content

How To Insulate Basement Walls With Rigid Foam Board

If your'e reading this article I hope you've already done your homework on all the other basement insulation methods and have carefully selected foam board installation because it best suits your situation. Now that you've made your (carefully calculated) decision, you can use this article as a resource to properly install your rigid foam boards. For more research for the best insulation for basement ceiling.

Rigid Foam Board Installation Basics

It was kind of difficult to explain how to insulate your basement walls with Rigid Foam Boards in one general article but I hope the steps below help! All the tools and materials needed for this approach can be found on amazon or your local Home Depot. I've included the links below.

Tools & Materials

  • Dry Saw
  • Caulk Gun
  • Foam Board Adhesive (You're going to need ALOT of this)
  • Box Cutter
  • XPS
  • Tyvek Tape

How To Insulate Your Basement Walls Using Rigid Foam Boards

      • 1. Step One

    adhesive for the foam boards

    More is better when you're applying this adhesive. Focus on the corners and edges of each board. The reason why I chose this specific type of adhesive is it is less likely to burn your foam.

      • 2. Step Two

    Try to find something to hold the boards up and steady while the adhesive dries. If you have any 4x4's laying around, you can use that. Just stand them up and tilt them against the foam boards with enough force to hold things up.

      • 3. Step Three

    drywall exampledrywall after being cut

    Make sure you install the full pieces of the board and have them cover any windows. Once the adhesive is done you can go back and cut out the openings for the window with your drywall saw. I put pictures up showing a before and after of drywall so you could get what I'm saying here.

      • 4. Step Four

    Keep things tight

    Make sure you are keeping the seems in between the boards as tight as possible. No space in between . Like my dog Mylo's nose.

      • 5. Step Five

    tape for foam boards

    Last step is to cover the joins with tyvek tape. Use expandable foam in places where the tyvek tape wont work.

    Wrapping Things Up With Your Basement Rigid Foam Board Insulation Walk-Through

  • If you have the tools listed above, this job isn't really a difficult task. The only thing that take time is waiting while the adhesive cures but other than that you're good to go. Using Rigid Foam boards as your insulation method may be a costly task but when done right you will be happy with the results.