• Read FHB on Your iPad
    Read FHB on Your iPad
  • Magazine Departments
    Magazine Departments
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • Video Series: Tile a Bathroom
    Video Series: Tile a Bathroom
  • Remodeling Articles
    Remodeling Articles
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • Deck Design & Construction
    Deck Design & Construction
  • Ultimate Deck Build 2015
    Ultimate Deck Build 2015
  • All about Roofing
    All about Roofing
  • Install a Vinyl Privacy Fence
    Install a Vinyl Privacy Fence
  • 9 Concrete Countertop Ideas
    9 Concrete Countertop Ideas
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • Master Carpenter Videos
    Master Carpenter Videos
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • Energy-Smart Details
    Energy-Smart Details
  • Design Inspiration
    Design Inspiration
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets



Icynene Boosts R-Value of Spray-Foam Insulation

comments (0) May 14th, 2014 in Blogs
ScottG Scott Gibson, contributing writer

Icynenes Classic Plus polyurethane spray foam has a higher R-value than its other open-cell foams, making it easier for builders to hit tougher energy-code requirements.Click To Enlarge

Icynene's Classic Plus polyurethane spray foam has a higher R-value than its other open-cell foams, making it easier for builders to hit tougher energy-code requirements.

Photo: Icynene

Icynene is now offering a low-density polyurethane-foam insulation with a slightly higher R-value, which the company says will help builders meet stricter energy-code requirements.

The product is called Icynene Classic Plus. The manufacturer says the two-part spray-in insulation has an R-value of 4 per in., compared to the 3.7 per in. of its Classic and Classic Max open-cell products.

Sprayed into a 2x6 wall, the foam would provide a total of R-22 in stud cavities (whole-wall R-values would be lower because of thermal bridging at wall studs, headers, and other framing members). The company's other low-density polyurethane foams have R-values of 3.7 per in., meaning 2x6 wall cavities would have a total R-value of 20.35.

That's enough to meet the International Code Council's 2012 energy requirements, as explained in a blog by GreenBuildingAdvisor senior editor Martin Holladay. Builders need at least R-21 in wall cavities in climate zones 7 and 8 in order to meet the 2009 energy code (lower in other, more moderate climate zones). The 2012 energy code only calls for R-20 in wall cavities, but it adds a requirement for continuous insulation on the outside of the walls to reduce thermal bridging (R-5). Icynene says some jurisdictions have amended the 2012 code to require R-21 in the wall cavities because it's cheaper than cavity insulation plus outside insulation. Standard open-cell foam is rated at only R-3.7 per in., making a 2x6 framed wall less than R-21.

"We initially developed the Classic Plus to meet the 2009 code but have seen other climate zones adopt the R-21 value as well, so we can satisfy all areas in the country that require R-21 (even R-22) in 2x6 wood stud walls," a company spokesman said by email.

Like other open-cell polyurethane foams, Classic Plus is vapor permeable. But it has slightly higher density than other Icynene open-cell products, 0.7 lb. per cubic foot (pcf) vs. 0.5 pcf. It's also water-blown, so it has minimal global warming potential, Icynene says.

posted in: Blogs
Back to List

Comments (0)

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