Look for a 6-inch overlap at vertical and horizontal seams btween courses. The house wrap or building paper should extend 1 to 2 inches below the bottom of the sheathing. All house wraps and building papers should be applied from the bottom to the top, so that upper courses lap over lower courses, shedding water away.
Band joist: Wrap the band joist with a strip of house wrap or building paper. Sometimes the wall is wrapped before it’s erected. After the wall is erected, make sure the drainage plane material is fastened below the band joist, or that the band joist is flashed and wrapped separately.
The sheets of the drainage plane should carry at least 6 inches beyond each side of every inside and outside corner. Don’t rely on caulk to protect the corners.
The drainage plane can be reinforced at the corner with a spline of house wrap or building paper applied vertically at the corner.
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