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Install deck ledger with 2″ rigid foam on exterior?

ktwidwell | Posted in Energy Efficiency and Durability on

Planning a deck. Unsure how to install the ledger to stick out far enough since there will be 2″ rigid foam, 3/4 inch strapping with clapboard on top of that. Any advice?

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  1. GBA Editor
    Martin Holladay | | #1

    The best way to support a deck is on independent footings rather than a deck ledger. This is especially true for homes with exterior rigid foam.

    For more information on this question, see these GBA threads:

    Any detail you come up with involving the attachment of a deck ledger on a house with rigid foam should be reviewed by an engineer.

    I will attach a detail proposed by the Cold Climate Housing Research Center in Alaska; it comes from their excellent publication, REMOTE: A Manual. Like any detail involving structural issues, this proposed detail should be reviewed by your engineer before you adopt it.


  2. ktwidwell | | #2

    Wow, thanks! Exactly the info I needed. I was not able to search this info on your site for some reason. (To prevent any future comments about how I should have done some research).

  3. GaryHigginbotham | | #3

    Karen, there is a stand off option available for supporting deck ledgers from 1" ,2", 3", 4" or 5" off the Wood building framing or Concrete subwall that has been installed on thousands of decks in the Atlanta area, primarily on Stone and Brick Veneer. They are manufactured by HDG Engineered Products and will work with Foam, Siding, Stone or Brick Veneer. They have been tested by ICC-NTA testing center. Good Luck with your project.

  4. GaryHigginbotham | | #4

    Attached is a photo of sample Vener applications

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