The ADO Products Wind Block Air Infiltration Seal System (10-Pack) is designed to secure 16\" OC or 22\" OC vents to reduce blow-out during construction and help provide a moisture and energy barrier once installed. It fits atop the top plate， Wind Block effectively blocks moisture from the exterior and acts as an insulation stop for the interior. It reduces mold and moisture problems at the wall's top plate. Install insulation tight to the Wind Block.
Secures 22 in. vents in place reducing blow-out during construction
Effective for use in new- and retrofit applications
Reduces energy loss at the attic perimeter by channeling air through the vent， and allowing insulation to stay securely on the top plate.
Polyboard material is waterproof and helps prevent moisture infiltration
Blocks moisture from exterior and acts as an insulation stop for the interior
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