Roofing Felt Requirements In Hawaii

The felt shall extend over the base flashing 2 inches 51 mm.

Roofing felt requirements in hawaii.

Provide drip edge at eaves and gables of shingle roofs. Determine what kind of roof you have 2. Chalk lines should be snapped 33 5 8 above the eave line. Chimneys stucco or brick walls shall have a minimum of two plies of felt for a cap flashing consisting of a 4 inch wide 102 mm strip of felt set in plastic cement and extending 1 inch 25 mm above the first felt and a top coating of plastic cement.

Compare roof materials on our website 3. Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. On roofs with a slope of 4 12 or greater use a single layer of 15 lb.

Drip edges on the eaves any valley liners and all flashing should be installed before the tar paper is laid. Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches. Approved building codes state building code state electrical code state elevator code state energy conservation code updated 03 31 2017 state fire code state plumbing code state residential code wind topographic factor maps for use with the state building code. Island of hawaii island of oahu island of kauai islands of molokai and lanai island of maui.

The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. The best weight for roofing felt is the 30 pound product because it provides thicker and stronger footing for. After this lines should be snapped every 34 as you move up the roof. 15 pounds per hundred square feet and 30 pounds per hundred square feet.

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. Learn how to find the square feet of you roof. Modern building code requirements.

Before laying roof felt all rotten decking must be replaced. The engineering and design of our buildings improve over time as our knowledge increases. And have made a series of short videos to show the pros and cons of each type of material. Overlap to be a minimum of 3 inches 76 mm.

Comparing roof prices in hawaii is as easy as 1 2 3. Drip edge at eaves shall be permitted to be installed either over or under the underlayment. Hawaii s past hurricanes that made landfall iniki 1992 and iwa 1982 have shown that hawaii s older houses are more vulnerable to major structural failure from wind forces.