Roof Sheathing Requirements For Concrete Tile

Class a roof assemblies include minimum 16 ounces per square foot copper sheets installed over combustible decks.

Roof sheathing requirements for concrete tile.

Where it can be demonstrated by code adoption date documentation and permit. 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 metal shall be fastened 6 on center with 12 ga. 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. Cricket or saddle coverings shall be of sheet metal of the same material as the roof covering. Clay and concrete tile roof systems installed as required by the florida. 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.

Underlayment materials required to comply with astm d226 d1970 d4869 and d6757 shall bear a label indicating compliance to the standard. Two new tables have been added. I found the local building codes for crickets and saddles are quoted as. Roof sheathing fastening secondary water barriers.

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 weighing less than 9 pounds per square foot shall have a minimum of one fastener each regardless of roof slope. Corrosion resistant roof nails or fasteners of compatible metals. On the basis of post disaster field in vestigations use of a ridge board is recommended.

Roof slopes between 2 and 12 and up to 4 in 12 require double underlayment as detailed in table 905 1 1 2. 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. The concrete tile roof has two saddle structures that are made of rolled peel and stick roofing.

Otherwise the roof is concrete tile. Mortar set or attachment to a ridge board. R902 2 fire retardant treated shingles and shakes. The metal and underlayment shall be joined with a bed of flashing cement and a 4 strip of asphalt saturated cotton or fiberglass fabric.

At tricky areas such as around roof vents chimneys and skylights self adhesive bituminous membrane can help achieve a watertight seal. For attachment of the board refer to table 21 in the addendum to the concrete and clay roof tile. 1 through 201 3 64 shall be accepted as meeting the mandated roof to wall retrofit requirements.