Roof Sheathing Requirements For Concrete Tile

Underlayment for asphalt shingles clay and concrete tile metal roof shingles mineral surfaced roll roofing slate and slate type shingles wood shingles wood shakes and metal roof panels shall conform to the applicable standards listed in this chapter.

Roof sheathing requirements for concrete tile.

Underlayment materials required to comply with astm d226 d1970 d4869 and d6757 shall bear a label indicating compliance to the standard. 1 through 201 3 64 shall be accepted as meeting the mandated roof to wall retrofit requirements. Roof sheathing fastening secondary water barriers. For attachment of the board refer to table 21 in the addendum to the concrete and clay roof tile.

At tricky areas such as around roof vents chimneys and skylights self adhesive bituminous membrane can help achieve a watertight seal. Tiles weighing less than 9 pounds per square foot shall have a minimum of one fastener each regardless of roof slope. The concrete tile roof has two saddle structures that are made of rolled peel and stick roofing. The metal and underlayment shall be joined with a bed of flashing cement and a 4 strip of asphalt saturated cotton or fiberglass fabric.

On the basis of post disaster field in vestigations use of a ridge board is recommended. Otherwise the roof is concrete tile. Roof slopes between 2 and 12 and up to 4 in 12 require double underlayment as detailed in table 905 1 1 2. Cricket or saddle coverings shall be of sheet metal of the same material as the roof covering.

All joints shall be lapped a minimum of 2. Class a roof assemblies include ferrous or copper shingles or sheets metal sheets and shingles clay or concrete roof tile or slate installed on noncombustible decks. Wind concrete and clay roof tile installation manual has been updated to comply with asce 7 16. Class a roof assemblies include minimum 16 ounces per square foot copper sheets installed over combustible decks.

Additionally the prescriptive fastening requirements for wood structural panel roof sheathing in section r803 2 of the fbcr have been updated to comply with asce 7 16. Corrosion resistant roof nails or fasteners of compatible metals. Tiles shall be installed in accordance with the manufacturer s installation instructions in areas where the wind speed exceeds 100 mph and where the roof is located more than 40 feet above grade. The metal shall be fastened 6 on center with 12 ga.

The concrete and clay roof tile installation manual gives guidance on two attachment methods for hip and ridge tiles. See special installation requirements of manufacturer and irc. Where it can be demonstrated by code adoption date documentation and permit. Clay and concrete tile roof systems installed as required by the florida.

The underlayment should lap over hips and ridges 12 inches in each direction and turn up vertical surfaces a minimum of 4 inches figure 2 20. Minimum 2 in 12 for clay and concrete tiles. Two new tables have been added.