You’ve patched the flat roof over the back porch more than once, and the stain on the ceiling keeps coming back. Or you’re adding a room or a carport and need a low roof that won’t leak in the first big storm. Either way, flat roof installation in Altamonte Springs is a job where the details you can’t see from the ground decide how it turns out.
A new flat roof is a real investment, and it’s fair to worry about paying for one and ending up with the same leak. You should know what goes into a good one before anyone starts tearing anything off.
APC Roofing is GAF Certified, licensed in Florida (CCC1337030) and insured. We install flat and low-slope roofs on homes and light commercial buildings, and your inspection and estimate are free. Call 407-270-1129.
When flat roof installation in Altamonte Springs makes sense
Not every leaking flat roof needs replacing. If the trouble is one bad seam or a cracked pipe boot and the insulation is dry, a repair is the better use of your money, and our flat roof repair in Altamonte Springs page covers that.
A new roof starts to make sense when seams are failing in many places, the membrane cracks when you bend it, water has soaked large areas of insulation or the roof ponds because the deck has sagged. It’s also the right call on new additions, carports and Florida rooms, where the goal is to get it right the first time.
Getting the slope right
The most common flat roof mistake is treating “flat” literally. A low-slope roof should fall about a quarter inch per foot toward a drain, scupper or gutter. In an Altamonte Springs summer, when an afternoon storm can drop a lot of rain in under an hour, that slope is what keeps water from sitting on the roof for days.
On a replacement, a new membrane alone doesn’t change the shape of the roof. If the old one ponded, the fix has to be built in, using tapered insulation that slopes toward the drain, a small ridge called a cricket to steer water around a curb or wall, or an added drain or scupper. A level on the roof during the inspection shows which one your roof needs.
What goes under the membrane
A flat roof is a stack of layers, and the membrane is only the top one. Under it there’s usually a thin cover board, then rigid insulation, then the deck.
Insulation keeps the room below cooler, and it’s often where a new roof gets its slope. It has to be dry. Wet insulation stops insulating, gets heavy and rots or rusts the deck under it. During a tear-off, soft or damaged decking gets replaced before anything new goes down.
Choosing the membrane
Most new flat roofs on homes around Altamonte Springs use one of two single-ply membranes:
- TPO, a white sheet with heat-welded seams that reflects a lot of the sun’s heat. It’s a popular choice here for exactly that reason. See TPO roofing in Altamonte Springs.
- EPDM, a black rubber sheet with taped seams. It’s flexible and handles foot traffic well, but it absorbs more heat.
Membranes come in different thicknesses, measured in mils. Forty-five and 60 mil are common on homes, and heavier sheets hold up better where people walk or service equipment. All of them look alike from the ground, so your estimate should list the thickness in writing. The other low-slope systems are covered on our flat roofing in Altamonte Springs page.
The tie-in and the edges
Most leaks on a new flat roof don’t come from the middle of the sheet. They come from where the roof stops.
Where a flat porch roof meets a sloped main roof, the membrane should run up under the shingles or tile, so water flowing down the main roof lands on top of it. If it’s lapped the other way, water runs behind it. That reversed tie-in is the usual cause of a wet ceiling right where the porch meets the house.
At the outer edges, metal edging fastened every few inches locks the membrane down against Florida wind, and its drip lip sends water into the gutter. Along walls, the membrane turns up and gets clamped and covered with counterflashing.
Tear-off or recover?
A recover lays the new membrane over the old roof with a separation board in between. Building codes generally allow it only when there’s one existing roof and the insulation is dry. A tear-off goes down to the deck, which lets bad wood be replaced and slope be corrected. Moisture readings and the number of existing layers usually make the decision for you, and you’ll see both in writing before you choose.
How it works
- Book your free inspection. Call 407-270-1129 or request a free estimate online.
- Get a clear, honest assessment and estimate. We check the slope, drainage, edges, tie-in and insulation, and give you photos and a written estimate that names the membrane and its thickness.
- Your roof gets done and the site gets cleaned up. Membrane work needs dry weather, so the schedule is set around the forecast. Financing is available through Aqua Finance, Fortifi, Hearth and Home Run Finance.
Flat roof installation questions
Can a new flat roof go over the old one?
Sometimes. If there’s only one roof there now and the insulation is dry, a recover may be allowed. If not, it’s a tear-off.
Should I pick a white or black flat roof?
In Central Florida, many homeowners pick white for the heat. A white membrane keeps the roof surface and the room below cooler.
Does my main roof have to be replaced at the same time?
No. The two can be done separately. If your main roof is due soon anyway, doing both together lets the tie-in between them be built new on both sides.
How long does a flat roof installation take?
Roof size, how much has to come off and the weather set the schedule. You’ll get a realistic timeline with your estimate.
A low roof you can stop worrying about
Every rainy season on a failing flat roof pushes more water into the insulation and the wood below it. Call 407-270-1129 to book your free inspection. The goal is a dry ceiling, a cooler room and a roof you don’t have to check on every time it storms.
