GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X 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

How do you reconcile continuous insulation requirements with rated assembly requirements?

user-1017842 | Posted in Building Code Questions on

The application is multifamily construction. We have energy requirements stipulating continuous R-3 insulation, in addition to required cavity insulation. We also have rated exterior wall assembly requirements.

I have not found any UL or GA assemblies that work, nor have I found any SIS product that has been UL tested.

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.

Related Questions

Replies

  1. Expert Member
    Dana Dorsett | | #1

    Half inch fire-rated rigid polyiso, mayhaps? What UL test does it need to meet?

  2. user-1017842 | | #2

    U356 and/or U305

  3. Expert Member
    Dana Dorsett | | #3

    UL U356 SIS test reports:

    http://sbcri.info/docs/pa/dow/TER_1109_01ULU356_Summary_Fire_Endurance_Assembly_UL_U356_FINAL.pdf?PHPSESSID=lss7ckn9kpdkr3bth121qusit0

    http://sbcri.info/docs/pa/dow/TER_1109_01_Dow_SIS_Fire_Endurance_Assemblies_FINAL.pdf?PHPSESSID=lss7ckn9kpdkr3bth121qusit0

    I'd be surprised if 1.25" Roxul Comfortboard over OSB or ply wouldn't pass the test, but I didn't find U305 or U356 in a cursory scan. http://www.roxul.com/residential/products/roxul+comfortboard+is

  4. user-1017842 | | #4

    Thanks for the help!

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |

  • |

  • |

  • |
View More Ask a Question

Featured Blogs

Musings of an Energy Nerd View More

Contemplating residential energy use

Product Guide View More

Double Check

Do you really want to delete the list, ?

Note

This won't delete the articles you've saved, just the list.

This feature has been temporarily disabled during the beta site preview.

You must be a magazine subscriber to access this feature.

Subscribe today and save up to 44%

Subscribe

Or learn more

Already a subscriber?