Water intrusion is the leading cause of commercial roof failure and the resulting damage can cost thousands in repairs, inventory losses, and business interruptions. Savannah's coastal climate—with its heavy rains, hurricanes, and high humidity—makes leak prevention especially challenging. Here's what every Savannah commercial property owner should know.
#1: Flashing Failures
Flashing is the material used to seal joints, edges, and penetrations in your roofing system. It's also the most common source of leaks.
Why Flashing Fails:
- Thermal expansion and contraction causes movement
- Improper installation at corners and edges
- UV degradation of sealants over time
- Wind uplift loosening flashing attachments
Critical areas: parapet walls, roof edges, HVAC curbs, pipe penetrations, and seam transitions.
#2: Membrane Seams & Joints
In single-ply roofing systems like TPO and EPDM, seams are heat-welded or adhesive-bonded. These bonds can fail for several reasons:
TPO Membrane Issues
- • Contaminated surface before welding
- • Incorrect heat temperature during installation
- • Poor overlap width at field seams
EPDM Rubber Issues
- • Adhesive bond failure from moisture
- • Seam separation over time
- • Shrinkage pulling seams apart
#3: Ponding Water
Standing water on flat roofs is more than an eyesore—it's a serious problem that accelerates membrane deterioration.
Structural Stress
Water weighs 5 lbs per square inch per inch of depth. A 2" deep puddle on a 10,000 sq ft roof adds 62 tons of stress.
Chemical Damage
Standing water absorbs UV radiation and heat, concentrating pollutants that degrade membrane surface.
Biological Growth
Algae, moss, and bacteria thrive in stagnant water, breaking down membrane materials from below.
#4: Penetration Damage
Every hole in your roof for HVAC units, pipes, vents, and electrical conduits is a potential leak point. These areas require special attention:
- HVAC Units: Condensate lines, ductwork connections, and mounting curbs commonly leak if flashings deteriorate
- Electrical Penetrations: Conduit entries often poorly sealed, allowing water to follow wires into the building
- Plumbing Vents: Lead boots and rubber collars crack after 10-15 years of UV exposure
#5: Wind & Storm Damage
Savannah's hurricane season brings wind speeds that test roof systems to their limits. Common storm-related damage includes:
TPO & PVC Damage
- • Membrane tears from flying debris
- • Seam separation from wind uplift
- • Complete blow-off in severe cases
Metal Roof Damage
- • Panel creasing and denting
- • Fastener back-out from cyclic loading
- • Seam separation in standing seam systems
#6: Age-Related Deterioration
All roofing materials degrade over time. Understanding your roof's age helps predict when failures are likely:
Preventive Measures
Protecting your Savannah commercial building from roof leaks requires proactive maintenance:
Regular Inspections
Biannual inspections catch problems early
Debris Removal
Keep drains clear and water flowing
Timely Repairs
Address small issues before they grow
Signs Your Roof is Leaking
Don't wait for visible water dripping inside. Watch for these early warning signs:
- Water stains on ceiling tiles or walls
- Musty odors in the building
- Visible mold or mildew growth
- Peeling paint or bubbling wallpaper
- Increased energy bills (wet insulation loses R-value)
If You Have an Active Leak
Time is critical. Every hour water enters your building causes additional damage. Our 24/7 emergency response team can stop the leak and prevent further damage.
Conclusion
Understanding the common causes of commercial roof leaks helps Savannah property owners prevent water damage, extend roof lifespan, and reduce maintenance costs. Regular inspections, prompt repairs, and proactive maintenance are the keys to protecting your commercial investment.