Ponding is a common problem with flat commercial roofing. It occurs when pools of standing water remain on the roof for an extended period, which can exacerbate existing problems like leaks, mildew and algae growth, and roof drooping if left unchecked. There are a number of possible causes a roofer can evaluate during an inspection. Here's a closer look at the most common culprits and how they're typically addressed.

3 Reasons Behind Ponding on Your Commercial Roof

1. Crushed Insulation

A flat roof has layers of insulation underneath that help maintain comfortable temperatures inside the building. However, these layers can become compacted over time if there are heavy objects on the roof, such as HVAC equipment or regular foot traffic.

As the insulation loses its shape, it will create depressions in your roof, allowing water to pool. Consider adding additional layers of insulation for reinforcement or replacing them entirely with new, undamaged material.

2. Clogged Gutters

If your flat roof drainage system is clogged with twigs, leaves, and other debris, it won't be as effective at removing water from the roof. Instead of draining away, the water will collect in puddles. 

Gutter cleaning is critical for preventing ponding on the roof and should be done at least once a year. Every six months may be a wiser schedule if trees overhang the property.

3. Incorrect Roof Design

Commercial roofing that appears to be flat is not completely flat. Instead, it should have a gentle slope that channels water to your drainage system. 

If the roof is angled away from the drains or has an irregular slope, the water can't escape completely. If this is the case, you might need a roofer to replace your existing roof with one that’s sloped correctly.

If standing water is a constant problem on your flat roof, the team at AAA Affordable Roofing will find the simplest solution. Since 1972, this roofing company has provided residential and commercial roofing services for thousands of customers in Charlotte, NC, and the surrounding communities. If you need roof repairs or replacement work done for your home or business, request a free quote on their website or call (704) 564-5597 to schedule an assessment.