SECTION 1807.3.2.1
SURFACE PREPARATION OF WALLS
Prior to the application of waterproofing materials on concrete or masonry walls, the walls shall be prepared in accordance with Section 1807.2.2.1.
CODE INTERPRETATION
This section implies that the wall substrate must be properly prepared to receive waterproofing materials. The wall must be free of all voids, openings, cracks, honeycombs, fissures and other imperfections prior to the application of the waterproofing material.
Concrete walls can be repaired using bituminous materials or other products approved by the material manufacturer.
Masonry walls shall be parged below ground level on the exterior surface using not less than 0.375-inch of Portland cement. The only exception is approved for application directly to the masonry.
DAMPPROOFING AND WATERPROOFING
SECTION 1507.2.9.3
DRIP EDGE
Provide drip edge at eaves and gables of shingle roofs. Overlap to be a minimum of 2 inches (51 mm). Eave drip edges shall extend 0.25 inch (6.4 mm) below sheathing and extend back on the roof a minimum of 2 inches (51 mm). Drip edge shall be mechanically fastened a maximum of 12 inches (305 mm) o.c.
CODE INTERPRETATION
This code implies that all steep-slope shingle roof systems require the application of a drip edge metal at the gables and the eaves. The intent of the drip edge metal is to secure the underlayment and to protect against moisture from infiltrating the system at these vulnerable points.
The drip edge is typically fabricated from aluminum or galvanized metal in an L-shape configuration that is secured to the deck and down the face of the eave or gable edge. The code specifically states that the drip edge shall extend a minimum of 1/4-inch (6.4 mm) down the eave and a minimum of 2 inches (51 mm) over the deck. The metal shall overlap a minimum of 2 inches (51 mm) and should be fastened with the appropriate fasteners every 12 inches (305 mm) on center.
ROOFING
An example of a pitched roof flange. Image courtesy of Metal-Era.
