When it comes to protecting your business, a durable roof is one of the best investments you can make. At Best Choice Roofing, we’ve built our reputation on delivering reliable, professional roofing services with a customer-first approach. Our experienced crew understands the unique challenges of this region’s climate, especially the heavy spring rains that can test the strength of commercial roofing systems. We proudly specialize in commercial roofing, offering steel metal solutions, including corrugated and standing seam roofing. Both options provide durability and longevity, but even the strongest roofs require proper maintenance to prevent problems like standing water after storms.
Why Does Standing Water Form on Commercial Roofs?
Commercial buildings often have flat or low-slope roofs, which naturally makes them more susceptible to drainage issues. Unlike a pitched residential roof, where water runs off quickly, flat roofs need an effective drainage system to move water away. Without it, water can collect in shallow “ponds” and linger for days after rainfall.
So, why does this happen? Some of the most common causes include:
- Poor drainage design – Flat roofs should have a slight slope toward drains, scuppers, or gutters. If this slope is missing or improperly installed, water has nowhere to go.
- Blocked drains – Spring often brings pollen, leaves, and other debris that clog drains and prevent proper runoff.
- Roof depressions – Over time, heavy equipment, foot traffic, or simple wear and tear can cause parts of the roof surface to sag, creating low spots where water naturally collects.
- Aging materials – Even strong roofing materials like corrugated or standing seam steel can develop problems if seams, fasteners, or flashing deteriorate and allow water to pool.
The result? Pooled water that may look harmless can put added stress on your roof.
Is Standing Water on a Flat Roof a Problem?
The short answer: yes. While a small amount of water may evaporate within 24–48 hours, consistent or long-term standing water signals a drainage issue that needs attention. Left untreated, this water can:
- Add extra weight to the roof structure, straining the supports over time.
- Increase the risk of leaks, especially if water finds its way into seams, flashing, or penetrations.
- Accelerate material deterioration, particularly if the water carries dirt, pollen, or chemicals.
- Lead to mold and mildew growth, creating health risks for building occupants.
That’s why property owners often ask: Should a flat roof have standing water? The ideal answer is no. A properly designed and maintained flat roof may hold a thin film of water for a short time after rain, but large, persistent puddles are a sign of trouble.
Why Spring Is the Most Common Time for Ponding
While heavy rain can happen any time of year, spring is the season when standing water on commercial roofs is most noticeable. In this region, spring brings frequent downpours combined with pollen, oak tassels, and other debris that quickly clog drains and gutters. Add in rapid temperature swings that cause roof materials to expand and contract, and it’s easy to see why issues surface more often in spring than other seasons.
This is also when business owners are often preparing for peak operating months, meaning any roofing issue can quickly disrupt daily operations.
What to Do If You Notice Standing Water
If you’ve spotted water pooling on your roof after a rainstorm, don’t ignore it. Here’s what to do:
- Schedule a professional inspection – A trained roofing contractor can identify whether the issue is minor (such as a blocked drain) or more serious (such as improper slope or structural depressions).
- Clean your drains and gutters – Regular seasonal maintenance goes a long way in preventing clogs and allowing water to move freely.
- Consider corrective measures – Solutions may include re-sloping sections of the roof, installing tapered insulation, or upgrading to durable standing seam panels that resist long-term water exposure.
- Monitor after storms – After each heavy rain, take note of how long water lingers. If it sticks around for more than two days, it’s time for repairs.
Trust Best Choice Roofing for Commercial Roof Care
Your commercial roof is a critical investment, and preventing standing water is one of the best ways to extend its life. At Best Choice Roofing, our professional team knows the ins and outs of commercial roofing systems, from corrugated steel to standing seam metal. With our expertise, you can feel confident your business is protected against the wear and tear caused by seasonal rains.
Don’t wait until small puddles turn into costly damage. Contact Best Choice Roofing today to schedule your free commercial roof inspection. Our trusted team is here to keep your roof in top shape, rain or shine.
