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Anyone have any good photos of insulation dams (soffit dams) in your attic?

Martin Holladay | Posted in General Questions on

For an upcoming article, I need some photos of wind-washing dams — you know, those vertical pieces of rigid foam or plywood that seal the gap between the perimeter wall top plates and the ventilation baffles in an attic.

If my explanation is confusing, I’m talking about those rectangles installed in a vented unconditioned attic, near the soffit, to limit the entry of air under the ventilation chutes.

If you have photos of these, you can either post them here or e-mail them to me:
martin [at] greenbuildingadvisor [dot] com. Thanks.


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  1. Chris_King | | #1

    Hi Martin, I am working on this project hopefully Sunday as I wait for materials for my crawl space. Would you also want pictures of sealing the top plates with tape as well or just the picture of the vertical xps I am using as the dam?

  2. GBA Editor
    Martin Holladay | | #2

    Thanks! The more photos, the better.

    Take photos of the different steps of the process if you can, using either a good flash camera or good lighting from a work lamp.

    I really appreciate it. If I use the photos, of course I will credit you as the photographer.

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