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

Rigid foam on the exterior of a house

randygiles | Posted in Green Building Techniques on

If I am planning on using 2 inches of foil faced polysio on the exterior of a house am I better of using two layers of 1 inch foam so that I can stagger the seams?

Thanks for your comments

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

    Yes, staggering and taping the seams on both layers makes it more reliably air-tight, even if the foam shrinks a little bit over the next handful of decades.

  2. GBA Editor
    Martin Holladay | | #2

    Randy,
    For more information on this topic, see How to Install Rigid Foam Sheathing.

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?