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Community and Q&A

Rainscreen detail and belly band

Stockwell | Posted in Green Building Techniques on

My house is slowly going up. In the back, it is two stories and there will be a 12″ belly band of boral trim at the floor level, with Hardi Artisan siding above and below. I am using 1/2″ plywood as furring strips. The builder likes to use a metal flashing where the siding transitions to Boral trim of course, but I am curious about the details. I had figured on using Cor-A-Vent at top and bottom of wall, but hadn’t counted on this flashing being attached to the plywood sheathing(which will have Adhero WRB on it). How should I arrange all the parts at this transition zone? Should I just put the ends of the furring strips over the flashing and vent the very bottom and very top of the wall only? Do I need Cor-A-Vent at the lower edge of the trim and up above the flashing? Could the rain screen gap be continuous over 2 floors and the flashing nailed to the furring strips? Any tips?

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  1. Stockwell | | #2

    So if I follow the logic, i should just mount the flashing on the furring strips and let the rainscreen gap do its job. It can drain down to the bottom of the wall even if it gets in 25' up! There is really no need for the flashing to attach to the plywood sheathing. Correct?

    1. Expert Member
      MALCOLM TAYLOR | | #3

      Yes that's right. The only flashings that go back to the plywood are those at the bottom of the walls, above doors and windows, and above small penetrations like light-mounts, etc. Flashing for all horizontal changes in siding material, belly-bands, water-tables, etc. get mounted to the furring.

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