Roof Sheathing Requirements For Concrete Tile

I found the local building codes for crickets and saddles are quoted as.

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. 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. Where it can be demonstrated by code adoption date documentation and permit.

For attachment of the board refer to table 21 in the addendum to the concrete and clay roof tile. Clay and concrete tile roof systems installed as required by the florida. 1 through 201 3 64 shall be accepted as meeting the mandated roof to wall retrofit requirements. The metal and underlayment shall be joined with a bed of flashing cement and a 4 strip of asphalt saturated cotton or fiberglass fabric.

See special installation requirements of manufacturer and irc. The concrete tile roof has two saddle structures that are made of rolled peel and stick roofing. All joints shall be lapped a minimum of 2. 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.

Otherwise the roof is concrete tile. Wind concrete and clay roof tile installation manual has been updated to comply with asce 7 16. Roof slopes between 2 and 12 and up to 4 in 12 require double underlayment as detailed in table 905 1 1 2. Mortar set or attachment to a ridge board.

Underlayment materials required to comply with astm d226 d1970 d4869 and d6757 shall bear a label indicating compliance to the standard. Minimum 2 in 12 for clay and concrete tiles. 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. The concrete and clay roof tile installation manual gives guidance on two attachment methods for hip and ridge tiles.

Corrosion resistant roof nails or fasteners of compatible metals. Class a roof assemblies include minimum 16 ounces per square foot copper sheets installed over combustible decks. R902 2 fire retardant treated shingles and shakes. Cricket or saddle coverings shall be of sheet metal of the same material as the roof covering.

Roof sheathing fastening secondary water barriers. At tricky areas such as around roof vents chimneys and skylights self adhesive bituminous membrane can help achieve a watertight seal. On the basis of post disaster field in vestigations use of a ridge board is recommended.