Flat & Low-Slope Roofing in Pensacola, FL — Modified Bitumen, TPO & EPDM Systems.

It's the most common question we get on porch tie-ins and additions, and the answer is code, not preference: the Florida Building Code (Residential R905.2.2) allows asphalt shingles only on slopes of 2:12 or steeper, and even between 2:12 and 4:12 only with special underlayment provisions. Below that pitch, water doesn't run off a shingle roof — it sits on it, works under the laps, and finds the nail holes. A shingled low-slope section isn't a budget option; it's a leak on a schedule, and it can give an adjuster a reason to call the resulting damage an installation defect instead of a covered loss.

What belongs on a low-slope residential section is a membrane system — and on an occupied Florida home our answer is two-ply self-adhered granulated modified bitumen: a self-adhered base sheet and a granulated cap sheet that bond to the deck without an open flame. We don't torch-apply over a living space — peel-and-stick membranes removed the reason to ever bring a torch onto an occupied house — and the granulated cap surface takes Gulf Coast UV and foot traffic far better than a bare membrane.

You'll also see TPO and EPDM pitched for house roofs. Both are legitimate systems — on the commercialbuildings they were engineered for, where big open fields, mechanical curbs and reflective single-ply membranes make sense. On a house, the flat section is usually small, cut up by walls and transitions, and tied into a shingle or metal field above it — exactly where a fully-adhered two-ply mod-bit detail outlasts a single-ply with mechanically seamed edges. That's why we install TPO on commercial work and mod-bit on homes, and why a bid that puts TPO on your porch deserves one follow-up question: what does the transition into the main roof look like in year ten?