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Community and Q&A

Rainscreen behind cedar shingles

Steve Greenberg | Posted in Energy Efficiency and Durability on

I’m very comfortable using strips of wood ( usually ply) behind lap siding and it SOP for me. I haven’t done it with shingle yet. Can I assume that I nail up the strips horizontally and leave some gaps here and there so air and water can flow? Any detailed drawings or better instruction that i can check out?

I could also go with cedar breather ( spun) but not sure if that’s more expensive or not. I plan to try and push for using poly-iso boards on the exterior if I can get the client to budget for it.

Thanks

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Steve,
    Either approach will work -- Cedar Breather or horizontal furring strips. Horizontal furring strips require a lot more labor to install than Cedar Breather.

    I wouldn't worry about drainage. You're not talking about much liquid water; any water that gets past the shingles will rapidly evaporate.

  2. Steve Greenberg | | #2

    Thanks Martin

    I'll probably go the Cedar Breather or Home Slicker direction. Putting up horizontal furring will just suck up too much time and drive me crazy also.

  3. Dan Kolbert | | #3

    Unless you're going with a pretty big exposure (7" or more), horizontal strapping is a huge PITA. You end up with more wood than air space with a 5" exposure.

  4. TJ Elder | | #4

    Steve, if you did install exterior polyiso, then it would make sense to use the horizontal strapping rather than cedar breather, just so the shingles can be nailed into strapping. A much smaller number of screws will then penetrate the insulation, to hold on the strapping.

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