Pitched shingle roofs get most of the attention after a storm, because missing shingles are easy to spot from the street. Flat and low-slope roofs are different. Plenty of Florida homes have them, especially over additions, carports, porches and older block houses, and the damage on them is usually quiet. Water doesn't run off a flat roof the way it runs off a steep one, so a small tear or a clogged drain can turn into a leak days or weeks after the wind has moved on.
Here's how I walk through a flat roof once a storm has passed, from what you can safely see from the ground to the point where you should hand it to someone with the right equipment.
First, stay off the roof until it's safe
Don't climb up while the wind is still gusting, while there's lightning around, or while the surface is wet. A wet membrane is slick, and a soaked roof deck can be soft in spots you can't see. Check for downed lines near the roof edge before you put a ladder anywhere. If you're not comfortable on a ladder, everything below can be done from the ground with binoculars, from a second-story window, or by a professional.
The National Hurricane Center's preparedness pages and Ready.gov's hurricane guide are worth a read before the season starts, so you know what to expect when you step outside afterwards.
Look for standing water (ponding)
Flat roofs aren't perfectly flat. They're built with a slight slope toward drains or scuppers. After heavy rain, most of the water should be gone within a day or two. If you still see puddles 48 hours later, something is wrong. Common causes are:
- Debris blocking a drain, scupper or gutter outlet
- A section of the roof deck that has sagged
- Insulation underneath that has soaked up water and compressed
Ponding adds weight and speeds up wear on the membrane, so note where it is and how big it is. A photo with a reference object, like a broom handle, helps later.
Check the membrane for tears, blisters and loose seams
Most residential flat roofs in Florida use modified bitumen, TPO, PVC or a coated built-up system. Whatever yours is, you're looking for the same things:
- Tears or punctures from flying branches or debris
- Blisters or bubbles, which can mean moisture got trapped underneath
- Seams that have lifted or split, especially along the edges where wind pulls hardest
- Bare spots where the granules or coating have been scoured off
Wind uplift tends to start at the perimeter and corners, so give those areas extra attention.
Inspect the flashing and edges
Flashing is the metal or membrane that seals the joints where the roof meets a wall, a parapet, a vent pipe or an AC stand. It's one of the most common leak points after a storm. Look for metal edging that's bent, lifted or missing, and for gaps around pipes and curbs. If the roof ties into a taller wall, check where the two meet for cracks or separated sealant.
Clear drains, scuppers and gutters
If you can reach them safely, clear leaves, shingles from the neighbor's roof and anything else blocking the water's way out. This is the single cheapest thing you can do to stop a small problem from becoming a big one. I covered the ground-level side of this in the pre-storm yard, gutter and drainage checklist, and the same outlets matter just as much afterwards.
Go inside and look up
Some of the best clues are indoors. Check ceilings under the flat section for:
- Brown or yellow water stains
- Bubbling paint or drywall that feels soft
- A musty smell, which can mean water has been sitting in the insulation
Stains sometimes show up a few days after the storm, so check again later in the week. Florida heat and humidity mean trapped moisture can turn into mold quickly, which is one reason not to put this off.
Document everything before anything gets fixed
Take wide shots and close-ups of every problem, inside and out, with dates on the photos. Keep receipts for any tarps or emergency materials. Most policies expect you to take reasonable steps to stop further damage, so a temporary tarp or patch is usually fine, but photograph the damage first. If you're heading toward a claim, my walkthrough on filing a homeowners insurance claim after a storm goes through the paperwork step by step, and flood vs. wind damage explains why the cause of the water matters.
When to call a professional
A careful look from the ground tells you a lot, but some things need a roofer with proper safety gear and a moisture meter:
- Ponding that doesn't drain after two days
- Any visible tear, puncture or lifted seam
- Soft or spongy spots underfoot
- Interior leaks or stains under the flat section
- Damaged flashing around walls, vents or AC equipment
Get the inspection in writing, with photos, so you have a record for your insurer. Wherever you are in the state, look for a licensed and insured contractor, and be wary of anyone knocking on doors right after a storm and pushing you to sign on the spot.
A quick checklist to keep on your phone
- Wait until it's dry, calm and safe.
- Look for standing water 48 hours after the rain stops.
- Check the membrane for tears, blisters and lifted seams, especially at the edges.
- Inspect flashing at walls, vents and equipment.
- Clear drains and scuppers if you can reach them safely.
- Check ceilings inside, and again a few days later.
- Photograph everything before any repair.
- Call a licensed pro for anything beyond a simple clean-out.
A flat roof that's checked early usually needs a patch. One that's left for a few weeks after a hurricane can need a lot more. A half-hour walk-around once the weather clears is well worth it.
Sources
This guide is general information only, not legal or insurance advice. Policies and rules change, so check your own policy documents and current official guidance for your situation.