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Visual Dictionary (2)
EPDM is a sheet material used as both a vapor retarder and air barrier. It seals cracks between sheathing joints from liquid water and wind while allowing water vapor to permeate. Soffit vents, roof turbines, ridge vents and gable vents provide attic ventilation. Centering is a temporary structure used to support masonry units in an arch form. Brick bonds like common bond and Flemish bond are used to lay bricks in alternating patterns. Dimensions and code requirements for windows must meet minimum sizes. Stair risers and treads must also meet code maximum and minimum dimensions.
