Abstract: A waterproof construction device formed from metal or plastic supports the bottom edge of a drywall wall in a spaced-apart relation to the floor. The inventive device consists of a basal contact region that rests on a floor at the base of a wall frame. A support region sized to support the lower edges of drywall sheets is elevated at least one quarter inch above the floor by an elevation region that connect the support region with the basal contact region. An attachment region contacts the wall frame and is in communication with the support region. The device is placed along the base of a wall frame in contact with both the floor and the wall frame, and the attachment region is fastened to the wall frame. Sheets of wallboard are then fastened to the wall frame with their lower edges resting on the support region. The base of the wall can then be finished by installation of a baseboard.