New construction roofing in Jensen Beach, FL

Shingle, metal and similar roofs have three approved ways to dry in the deck. The first layer is a fully adhered, polymer-modified bitumen underlayment. Another is a 3 3/4-inch membrane strip over every deck joint, then an approved underlayment across the roof. The third is two layers of felt-type underlayment fastened with ring or deformed shank cap nails. Your contractor picks one of these options for the permit.

At eaves and gables, drip edge must be fastened at most 12 inches on center. That spacing drops to 4 inches on center where design wind speed is 110 mph or more, or where mean roof height exceeds 33 feet.

• Tile should go down only on solid sheathing, barring test results that show another approach works.
• Roof sheathing nails must meet the ASTM F1667 RSRS standard named in the code.
• Gutters are required on eaves under 6 inches, and downspouts must discharge at least 1 foot from the sidewall.

Roofing is a statewide-approval product category, so the product approval number belongs on the permit. You can check a product on the Florida Building Commission approval search by its FL number or manufacturer. Martin County is outside the High-Velocity Hurricane Zone, which covers only Miami-Dade and Broward counties, so the Miami-Dade Notice of Acceptance wording does not set your local rule.

A general contractor may install asphalt shingles only on a new building it is constructing itself. Hire a roofing contractor who holds a certification or registration to work on tile, metal, or membrane roofs. Check the license status of any roofer on the state licensing lookup before work starts.