Exterior Contractor Product Guide

Windblock

The Windblock rafter air infiltration block from ADO Products is designed to properly ventilate an attic and reduce energy loss efficiently and affordably. By creating a tight seal at the plate area, Windblock keeps cold air and wind-driven moisture from infiltrating between the rafter vent and the top of the wall. Made of waterproof polyboard, it also blocks wind-driven rain from saturating insulation.