Roof Sheathing Requirements For Concrete Tile

Two new tables have been added.

Roof sheathing requirements for concrete tile.

Corrosion resistant roof nails or fasteners of compatible metals. 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. Tiles weighing less than 9 pounds per square foot shall have a minimum of one fastener each regardless of roof slope. Cricket or saddle coverings shall be of sheet metal of the same material as the roof covering.

The metal shall be fastened 6 on center with 12 ga. Underlayment materials required to comply with astm d226 d1970 d4869 and d6757 shall bear a label indicating compliance to the standard. Wind concrete and clay roof tile installation manual has been updated to comply with asce 7 16. 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. 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. 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. Mortar set or attachment to a ridge board. Otherwise the roof is concrete tile. Roof sheathing fastening secondary water barriers.

Roof slopes between 2 and 12 and up to 4 in 12 require double underlayment as detailed in table 905 1 1 2. I found the local building codes for crickets and saddles are quoted as. All joints shall be lapped a minimum of 2. At tricky areas such as around roof vents chimneys and skylights self adhesive bituminous membrane can help achieve a watertight seal.

See special installation requirements of manufacturer and irc. 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 concrete and clay roof tile installation manual gives guidance on two attachment methods for hip and ridge tiles. 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.

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