How to Insulate Concrete Foundation Walls From the Inside Out - Fine Homebuilding

previous
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • Magazine Departments
    Magazine Departments
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
  • Design Inspiration
    Design Inspiration
  • Remodeling Articles
    Remodeling Articles
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets
  • Energy-Smart Details
    Energy-Smart Details
  • Master Carpenter Videos
    Master Carpenter Videos
  • 9 Concrete Countertops Ideas
    9 Concrete Countertops Ideas
  • Custom Flooring Inspiration
    Custom Flooring Inspiration
  • Read FHB on Your iPad
    Read FHB on Your iPad
  • Hot Water Now
    Hot Water Now
  • Pro Tool Rental. Learn More.
    Pro Tool Rental. Learn More.
  • All about Roofing
    All about Roofing
  • Video: Install a Fence
    Video: Install a Fence
  • A New Approach to Classic Cabinets
    A New Approach to Classic Cabinets
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • Video Series: Tile a Bathroom
    Video Series: Tile a Bathroom
next

Editor's Notepad

Editor's Notepad


How to Insulate Concrete Foundation Walls From the Inside Out

comments (1) September 23rd, 2011 in Blogs
ScottG Scott Gibson, contributing writer


A builder planning a high-efficiency spec house wants to insulate the foundation walls, and is considering a type of panel that incorporates an inner layer of rigid foam insulation and two outer layers of concrete. Will it work?


Related articles from GBA

Green Basics: Insulated concrete forms

Should Insulated Concrete Forms be Air-Sealed?

Code Green: Mass Walls Increase Insulation Value

How to Finish Exterior Foundation Insulation


Peter Fusaro likes what he hears. The concrete protects the foam from damage, making this approach more appealing than leaving foam exposed on the exterior. He understands that 2 in. of extruded polystyrene insulation will give the wall an R-value of more than 19. That's the premise he takes to the Q&A forum at GreenBuildingAdvisor, and that's the subject of this week's Q&A Spotlight.

To GBA senior editor Martin Holladay, what Fusaro is describing sounds like the Thermomass Building Insulation System, which does claim an R-value of 19.27 for the 10-in. thick panel.

But as Holladay points out, the foam insulation only adds up to R-10. Don't mix up the effects of thermal mass with R-value, he warns.

Another concrete-and-foam option is insulating concrete forms. But in both cases, there's some question on what benefit, if any, Fusaro will reap from the thermal mass of the concrete. At least one reader thinks the effect will be minimal.

Read the whole article at Green Building Advisor.

 



posted in: Blogs

Comments (1)

Marty10fingers Marty10fingers writes: Have seen many poor insulation jobs and few moving to better practices. Doing some google I found a U. of Waterloo study helpful when considering retro fitting basement insulation and moisture issues.

Posted: 10:53 am on September 26th

Log in or create a free account to post a comment.