Commercial roofing in Holiday, FL

New low-slope roofs need a minimum design slope of one-fourth unit in 12. Built-up, modified bitumen, single-ply, spray foam and liquid-applied systems are all subject to it. Hurricane Eta in 2020 put 5.05 inches of rain on Holiday, the highest total in Pasco County, and flat roofs without enough slope hold that water.

Ask every bidder how the roof drains. The code defines positive drainage as water gone within 48 hours of rain. Where drains are required and parapets trap water, secondary overflow drains or scuppers must be provided.

For TPO, the sheet must meet ASTM D6878. For modified bitumen, the listed ASTM standards include D6162 through D6164. A bid should name the standard and the product approval, not just a brand.

Pasco County Building Construction Services handles the permit. The 25 percent rule applies: if more than 25 percent of a roof section is repaired or replaced in 12 months, the whole section must be brought to current code. The exception covers only a roof built or redone under the 2007 code or later.

If work has not begun within 6 months, the permit lapses. Pasco County saw Hurricane Irma damage in 2017, so owners with older buildings should plan work well ahead of storm season, not in a rush after one.

• Written product approval numbers from the Florida Building Commission search
• The permit applicant's name and contractor license, checked by you
• The first inspection must be preceded by a recorded Notice of Commencement
• A tear-off or recover decision tied to the code limits above