Ponding water on a roof is a concern that should never be overlooked. Regardless of the type of roofing system in place, stagnant water can lead to a myriad of problems, some of which can be financially burdensome. Proper measures in design, installation, and regular maintenance can mitigate these issues, ensuring the longevity of your roofing system.

What is Ponding Water?

The National Roofing Contractors Association (NRCA) characterizes ponding water as any water that remains stagnant on a roof for a period exceeding 48 hours. To prevent such occurrences, most building codes stipulate a minimum slope of ¼” per foot during roof installations. This gradient typically guarantees efficient drainage, preventing water from accumulating.

The Major Consequences of Ponding Water

1. Growth of Algae and Vegetation

The presence of stagnant water can lead to the proliferation of algae and other vegetation. These organisms can damage the roofing membrane, with roots potentially penetrating the roof. Moreover, they can obstruct roof drains, further exacerbating the ponding issue.

2. Safety Concerns

Roofs with single-ply membranes become exceedingly slippery when water ponds on them. This poses a significant risk, as routine inspections or any activity on the roof can lead to slips, falls, and subsequent injuries.

3. Structural Overload

Water is deceptively heavy. To put it in perspective, a single gallon of water weighs approximately 8.3 pounds. A sizable pond, depending on its depth, can add thousands of pounds of undue weight to a structure.

4. Membrane Leaks

Even a minor breach in the roofing system can have detrimental effects. A small amount of water ingress can compromise the insulation’s thermal properties, damage the deck, and even harm the interior of the building. Imagine the havoc that 20 or 30 gallons of water could wreak compared to a minor leak.

The Impact of Ponding Water on Roofs

The Importance of Addressing Ponding

While some manufacturers might not clearly specify in their warranties, or might lack exclusions for ponding water, it’s crucial to address this issue. Opting for a solution that might seem less expensive initially, like avoiding tapered insulation, could lead to significant costs down the line.

To ensure the longevity of your roofing system and to prevent potential costly repairs, it’s essential to consider these factors before installing a new roof or undertaking a reroofing project. For expert guidance and top-notch roofing services in Myrtle Beach South Carolina, consider reaching out to Lenox Roofing. With a reputation as one of the leading Myrtle Beach roofing contractors, Lenox Roofing offers unparalleled expertise and commitment to quality.

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