Commercial Flat Roofs: 5 Tricks to Stop Water Ponding

Water ponding can be a problem for commercial flat roofs. Standing water can attract insects, lead to mold and algae growth, and create interior leaks. It can accelerate the deterioration of the roofing materials, reducing the longevity of the roof. Ponding can also invalidate roofing warranties and compromise your building’s structural integrity.

commercial roof maintenance

Fortunately, professional roofing contractors have workable solutions for eliminating or preventing water pooling on commercial flat roofs.

No. 1: Fix Low Spots

Despite the common perception to the contrary, commercial flat roofs aren’t completely flat. They have subtle slopes to facilitate drainage. If your rooftop has low spots, water ponding can easily occur. A professional roofing contractor can fill in low areas with roof plaster to better direct water toward drains.

No. 2: Flush Existing Drains

Just like the drains in your home, the drains on commercial roofs can become clogged with debris. In some cases, a serious clog can lead to standing water. Removing leaves, sticks and other rooftop debris from the drainage system is frequently sufficient to allow rain and melting snow to flow away as it should.

No. 3: Add More Drain Lines

Flat roofs in areas with high precipitation often need additional drains — a fact the building owner may not realize until water ponding becomes a problem after a heavy storm. Professional roofing contractors can install extra drain lines or widen the existing drains to direct water away from the rooftop.

No. 4: Install Roof Crickets

Water ponding near chimneys and large vents can often be solved by installing roof crickets. Crickets are ridged structures designed to divert rainwater and melted snow around roofing obstructions. Adding crickets can also help when standing water is associated with a transition between roof areas.

No. 5: Re-Pitch the Rooftop

With some commercial roofs, the pitch wasn’t properly designed or installed the first time around. Without adequate sloping, water can’t drain and pooling is likely to occur. Though the process is complicated and may be costly, re-pitching a flat roof is sometimes the only way to solve a ponding problem.

Have you noticed standing water on your building’s roof, or do you want to make sure that water ponding doesn’t become a problem? Either way, the professional roofing contractors at Knockout Roofing can meet your needs.

The Knockout Roofing team has more than 15 years of experience providing professional services to both residential and business customers throughout northern Utah. For an expert roofing evaluation, or to discuss our approach to solving water ponding on commercial flat roofs, contact our Salt Lake City office today.