Flat roofs are a popular choice for many commercial buildings and modern-style homes in St. Petersburg, Florida, thanks to their sleek appearance and cost-effectiveness. However, despite their advantages, flat roofs require regular maintenance to prevent common issues that can lead to costly repairs down the road. Understanding these problems—and knowing how to fix them—can help homeowners and business owners protect their property and extend the life of their roofing system.
At Old Time Roofing, we’ve been servicing residential and commercial roofs across Pinellas County since 1978. With more than 100 years of combined experience, our family-owned roofing company has seen every flat roof issue imaginable. Here’s a closer look at the most common roofing problems with flat roofs and how to properly address them.
1. Ponding Water
Flat roofs are not completely flat—they’re designed with a slight pitch to allow water drainage. However, over time, that slope can weaken due to structural shifts or improper installation, leading to ponding water. Standing water is one of the most serious flat roofing problems because it increases the risk of leaks, mold growth, and premature membrane deterioration.
How to Fix It:
- Inspect and clean your drainage systems regularly to prevent clogs.
- Install tapered insulation to improve the slope.
- If the problem persists, contact a professional roofer like Old Time Roofing to re-level the surface or replace damaged areas.
2. Roof Leaks and Moisture Damage
Because flat roofs have minimal slope, water doesn’t drain off as easily as on pitched roofs. This makes them more susceptible to leaks—especially around seams, flashing, or penetrations like vents and HVAC units. Once moisture seeps through, it can damage insulation, cause mold growth, and compromise the building’s structure.
How to Fix It:
- Conduct regular inspections, especially after heavy rain.
- Patch minor cracks and blisters immediately.
- Hire a certified roofing contractor to reseal seams and flashing with high-quality waterproof materials.
Old Time Roofing, a Master Elite Weather Stopper GAF Roofing Contractor, uses advanced leak detection and high-grade roofing membranes to ensure long-lasting protection.
3. Blistering and Cracking
Blisters or cracks form when air or moisture becomes trapped under the roofing membrane. Over time, temperature fluctuations cause these bubbles to expand and contract, eventually rupturing the material. Once that happens, your roof becomes vulnerable to leaks and UV damage.
How to Fix It:
- Inspect your roof during cooler hours to spot early blister formation.
- Small blisters can sometimes be cut open and resealed, but larger ones may require membrane replacement.
- Always use professional-grade sealants and hire licensed roofers to handle membrane repairs.
4. Poor Installation or Repairs
Improper installation is one of the root causes of recurring flat roof problems. When corners, seams, or drainage systems are not properly aligned, the roof’s performance quickly deteriorates. The same applies to low-quality or rushed repairs done by inexperienced contractors.
How to Fix It:
- Always hire a trusted, certified roofing contractor.
- Verify that they use manufacturer-approved materials and follow building codes.
- Schedule a roof inspection after major installation work to ensure everything was done correctly.
With Old Time Roofing, clients can expect honest, forward service, detailed estimates, and direct involvement from the owner to guarantee customer satisfaction.
5. Flashing Damage
Flashing acts as a watertight seal around roof edges, vents, and chimneys. On flat roofs, flashing is especially important—but it can deteriorate or loosen due to heat expansion or age, allowing water to penetrate beneath the membrane.
How to Fix It:
- Check flashing for cracks, corrosion, or detachment at least twice a year.
- Replace damaged flashing with high-quality metal or rubber materials designed for flat roofs.
- Apply a waterproof coating to reinforce the seal and prevent future leaks.
6. UV and Heat Damage
Florida’s intense sun can cause flat roofing materials to dry out, crack, or fade over time. This UV degradation not only affects the roof’s appearance but also reduces its ability to reflect heat, leading to higher energy bills and reduced insulation efficiency.
How to Fix It:
- Apply reflective roof coatings to protect against UV damage.
- Schedule professional maintenance annually to check for signs of heat stress.
- Consider installing a cool roofing system for improved energy efficiency.
Why Professional Maintenance Matters
Regular maintenance is the key to avoiding costly flat roof repairs. Having a certified roofer inspect your property annually can help detect small issues before they escalate. Experienced roofing professionals, like the team at Old Time Roofing, use advanced inspection tools and GAF-certified materials to keep your roof durable, watertight, and energy-efficient.
Final Thoughts
Flat roofs offer many benefits, but they demand consistent care and expert attention. By understanding common flat roof problems and addressing them early, property owners can prevent damage and extend their roof’s lifespan.
If you notice signs of ponding, cracking, or leaks on your flat roof in St. Petersburg, don’t wait until the problem worsens. Contact Old Time Roofing—your trusted, local, and family-owned roofing company since 1978. We provide professional inspections, repairs, and replacements backed by integrity, skill, and decades of experience.
Call Old Time Roofing today for a free estimate and let us help you protect your investment with quality craftsmanship and trusted service.
This post was written by Ted Williams! Ted is the owner of A Old Time Roofing, one of the best roofing companies in Saint Petersburg, FL! Ted is a Master Elite Weather Stopper GAF Roofing Contractor, a double award winner of Best Steep-Slope Contractor from GAF and achiever of Master Elite Consumer Protection Excellence from GAF. He has been serving the Pinellas County area since 1978. Old Time Roofing has a tradition of quality workmanship, servicing residential and commercial properties.