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Community and Q&A

Steel siding: housewrap?

John P. | Posted in Green Building Techniques on

I started a project with the following wall assembly:

Zone: 4
Inside – OSB – Peel-stick membrane – 4″ Foam insulation fully taped and seams staggered (two layers, R20 total) – 3/8″ air gap – furring strips – SIDING – Outside

Originally I was going to do wood siding – with top and bottom air vents. Long story short, I decided to go with steel siding, with only an air vent on the bottom.

Should I install a house wrap between the furring strips and siding? I realize the siding will condense some water, but am concerned the housewrap will retain moisture between the steel and furring strips. I can’t vent the top due to how the siding is installed.

Thanks!

John

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Replies

  1. Expert Member
    Malcolm Taylor | | #1

    John,

    No. The WRB needs t0 be behind your furring.
    Most metal siding requires horizontal furring strips. Depending on the profile of your siding, you may not end up with much of a rain-screen cavity left. Using Cor-a Vent rather than wood might be a good solution.

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