Broward County Certificate of Competency 21-R-22240-X
Why does my flat roof hold standing water days after a storm?
A straight answer for Broward County homeowners, then what you can check yourself and when to call. Free estimate: (954) 906-1715.
A flat roof holds water for days because the water has nowhere to go: the roof has low spots, the drains or scuppers are blocked or poorly placed, or the deck has sagged over time. Every flat roof is built with a slight slope toward drainage, and when that slope is lost or the outlets stop working, water sits.
Ponding is not always a leak yet, but it is a warning sign. Water that sits day after day ages the membrane faster, adds weight to the structure, and finds any weak seam. The cause decides the fix, which can be as simple as clearing a drain or as involved as re-sloping part of the roof.
Why flat roofs pond
The most common causes are drainage-related. Drains, scuppers and downspouts clog with leaves, granules and debris, especially after the heavy afternoon storms of Broward's rainy season. Some roofs also have too few drains, or drains set higher than the surrounding surface, so a shallow pool always remains.
The second group is structural or installation-related. Decks can deflect over time, insulation under the membrane can compress or get saturated, and layers added during past re-roofs can create humps and dips. Rooftop equipment curbs can also dam water. Heat and strong UV make the membrane stretch and soften, which can deepen low spots.
Many Broward homes have a low-slope section over an addition, a porch or a carport, and condos and townhomes often have flat roofs that nobody inspects until a stain shows up inside. Whatever the roof type, standing water on a membrane that was meant to shed it should be looked at.
What you can check yourself
Watch where it sits
From the ground or an upper window, note which areas hold water after a rain and how long it takes to clear. Photos taken at the same spot over several days help a roofer see the pattern.
Look at the drain outlets from the ground
Check the downspouts and scuppers at the roof edge. If water barely trickles out during rain, or there is a stain below the outlet, the drain path is likely partly blocked.
Check ceilings and walls inside
Look under the ponded area for stains, bubbling paint, musty smells or soft drywall. Interior signs mean water is already getting through.
Note the roof's history
Think about whether the roof was ever overlaid, patched or had equipment added. That history helps explain why the low spot formed.
Stay off the wet roof
A wet membrane is slippery and a weakened deck may not support weight. Leave rooftop work to a professional.
When to call a pro
Call a roofer if water routinely stays for days, if you see stains or sagging inside, or if the membrane looks blistered, cracked or soft near the ponded area. A sagging deck or saturated insulation is not something to patch over, because the cause has to be found first.
In Florida, roof repair and replacement generally must be done by a licensed contractor, so confirm any contractor's license status and scope with DBPR and Broward County. For roofing, we work under Broward County Certificate of Competency 21-R-22240-X. A building permit is required for essentially all roof replacements and most repairs beyond minor maintenance. Your city's building department issues it, so verify the details with them. If you live in a condo, townhome or HOA community, you may also need board approval before work starts.
Roof Repair & Replacement work is done under Broward County Certificate of Competency 21-R-22240-X (roofing).
What a pro will do
- Diagnose the causeWe look at slope, drain size and placement, membrane condition and signs of wet insulation or deck movement, then explain whether it is a drainage fix, a localized repair or a larger re-slope.
- Repair or replace the affected areaDepending on findings, that can mean clearing and correcting drains, repairing seams and flashing, or replacing the low-slope system. Many fixes involve tapered insulation or added drainage to move water off the roof.
- Use HVHZ-approved productsRoofing assemblies, underlayment and fasteners in Broward must carry a Miami-Dade Notice of Acceptance or Florida Product Approval showing HVHZ acceptance, and we install them to that approval.
- Handle permits and inspectionsWe pull the permit when the work needs one, schedule inspections including any in-progress dry-in inspection, and close out the permit. An open permit can cause problems at sale or refinance.
- Document storm damageIf a storm contributed, we provide photo documentation and a written scope for your insurer.
Related questions
- Is ponding water a roof leak?
- Not necessarily, but it raises the odds of one. Standing water stresses seams and flashing and speeds membrane aging, so a roof that ponds today may leak later. A roofer can tell you whether the membrane is still sound.
- Does a new flat roof affect my wind-mitigation form?
- A replacement can affect categories on form OIR-B1-1802, such as roof covering, roof deck attachment and secondary water resistance. A licensed inspector records these. Florida law (s. 627.0629) requires insurers to offer wind-mitigation discounts, though amounts vary by insurer. Our free Wind Mitigation Credit Checker is a good place to start.
- Do I need a permit to fix a ponding flat roof?
- Roof replacements need a permit, and so do most repairs beyond very minor maintenance. Rules differ by city, so verify with your city's building department, or Broward County Building Code Services if you are in an unincorporated area.
- When is the best time to fix a flat roof in Broward?
- The drier winter months are generally the easiest window to schedule non-emergency re-roofs. Ponding that is already causing leaks should be looked at sooner. Call (954) 906-1715 for a free estimate.
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