GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Has anyone used EcoFoil or radiant barrier/insulation in basement?

Carfar96 | Posted in Green Products and Materials on

We are trying to protect our concrete basement from moisture. We were thinking about putting EPS foam on the floors and walls as a thermal and vapor barrier. We still may go that direction, but I am concerned about our daughter’s chemical sensitivities and the flame retardants in the foam. Has anyone used a radiant barrier like EcoFoil on the walls and concrete slab (under laminate)? Here is a link to the product: We plan to insulate the walls with mineral wool batts on top of the foam or foil, so I am not too concerned about it’s insulative value. Thank you!

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. GBA Editor
    Martin Holladay | | #1

    If you don't care about the product's insulative value, why do you want to install it?

    If you did care, you might be interested to know that a radiant barrier is useless unless it faces an air space. So if you sandwich it between concrete and a mineral wool batt, it won't help insulate. But evidently you don't care about that.

    If you simply want a vapor barrier, it would work. But there would still be problems using an air-permeable insulation like mineral wool in the interior side of this type of vapor barrier -- because the vapor barrier would be cold. That means that you will get condensation on the vapor barrier.

    Here is a link to an article with more information on these issues: How to Insulate a Basement Wall.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |