Roofing Felt Requirements In Hawaii

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.

Roofing felt requirements in hawaii.

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. Comparing roof prices in hawaii is as easy as 1 2 3. Modern building code requirements. Chalk lines should be snapped 33 5 8 above the eave line.

Before laying roof felt all rotten decking must be replaced. Eave drip edges shall extend 1 2 inch 13 mm below sheathing and extend back on the roof a minimum of 2 inches 51 mm. Leakmaster roofing installs all these best selling materials. Learn how to find the square feet of you roof.

Overlap to be a minimum of 3 inches 76 mm. The best weight for roofing felt is the 30 pound product because it provides thicker and stronger footing for. Drip edges on the eaves any valley liners and all flashing should be installed before the tar paper is laid. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights.

For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. The felt shall extend over the base flashing 2 inches 51 mm. And have made a series of short videos to show the pros and cons of each type of material. 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.

The engineering and design of our buildings improve over time as our knowledge increases. On roofs with a slope of 4 12 or greater use a single layer of 15 lb. 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. Provide drip edge at eaves and gables of shingle roofs.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Compare roof materials on our website 3. Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches. After this lines should be snapped every 34 as you move up the roof.

Drip edge at eaves shall be permitted to be installed either over or under the underlayment. Determine what kind of roof you have 2. 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.