IB Curb Detail MA

To install a mechanically fastened curb base flashing, you will need to measure the dimensions of the curb. Measure the curb height and allow for the base flashing to extend a minimum of five inches out onto the roof extending past the membrane termination. This will provide a sufficient distance to form a one-and-a-half-inch welded seam past the fastener plate. Add two inches for the vertical seam overlap. Be sure to terminate the membrane at the curb transition. Locate the fasteners around the base of the curb spaced 12 inches in the center. Wrap the curb with IB PVC flashing membrane using a single piece. Secure the membrane to the top of the curb on each side, while making relief cuts at the base of each corner. Tack weld the flashing membrane to the roof to hold it in position. Weld the flashing membrane around the base of the curb, forming a one-and-a-half-inch weld on all sides.