Commercial roofing in New Port Richey East, FL

Flat roofs on apartment blocks and small commercial buildings still need slope. New built-up, modified bitumen, single-ply, spray foam and liquid-applied roofs must be designed for at least one-fourth unit in 12. Florida's definition of positive drainage means water leaves the roof within 48 hours of rain. Standing water past that point is a defect to raise with the bidder.

Where a parapet could trap water, the code calls for secondary overflow drains or scuppers. Pasco rainfall is heavy in tropical systems: Hurricane Hermine in 2016 dropped 15.40 inches 2 miles north-northeast of Port Richey. Ask where the overflow sits on your roof and what size it is.

The 25% rule matters for phased work. In any 12-month window, replacing or recovering more than 25 percent of a roof section obligates you to do the entire section. An exception applies when the existing roof was built or replaced to the 2007 code or later, which limits the current-code requirement to the repaired part.

• Which single-ply standard applies: TPO to ASTM D6878, EPDM to D4637, PVC to D4434.
• Start by confirming whether each bid proposes a recover or a full tear-off. Recover is barred over a wet roof or one with two or more existing coverings.
• Who holds the roofing trade registration under Florida contractor law, and who pulls the Pasco permit.
• Whether metal edge flashing is tested to ANSI/SPRI ES-1 or RAS 111.
• Whether the Notice of Commencement is recorded before the first inspection.

Rooftop units stay as they are unless they are replaced or moved during reroofing. Florida law does not let a local government require existing equipment to meet the current code otherwise. Ask each bidder in writing what they plan to do with the units on your roof.