Why is There Ponding Water on My Flat Roof?

Intense Storms Can Cause Damage To Your Flat Roof

Whether your roof is built of asphalt shingles or polyiso, you need to know the signs of roof damage. A crack in your roof can result from excessive moisture, which can saturate the polyiso layer and substrate underneath. Proper maintenance is essential to the life of your flat roof. Luckily, you can get help from a flat roof repair contractor, such as BELDON(r) Roofing Company.

While many storms do not cause damage to roofs, the wind is one of the most common culprits. Winds from intense storms can cause significant damage to flat roofs. Over half of severe wind damage occurs in intense thunderstorms. Wind damage occurs in several forms, including macrobursts, microbursts, and straight-line winds. Hurricane-force winds are anchored over wide expanses of land and can damage flat roofs.

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After a storm damages your roof, it’s important to document the damage. If the damage was caused by intense storms, your building insurance provider may refuse to pay if it was in poor condition before the storm. If you’re unsure about the level of damage caused, an independent roofing contractor can help you get the insurance company to approve your claim. They’ll also assess the damage and document it for you.

Cleaning the Drains

Clean the drains on a flat roof frequently to prevent ponding water from occurring. Water will accumulate on your roof if they are clogged with debris. Luckily, there are several ways to prevent water ponding on your flat roof. Regularly cleaning the drains can prevent water from collecting and redirecting. If you cannot do this yourself, consider hiring a roofing company to come out and repair the roof for you.

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The first step to cleaning the drains on a flat roof is to determine the main cause of the problem. The most common cause is poor workmanship. This is because the architectural plans for a new roof should be matched to the building’s layout and shape. If these two factors are not compatible, the resulting ponding water will be a constant problem. Once the root cause is identified, the next step is to clean the drains.

If your gutters are clogged, you can flush them out using a garden hose nozzle. Pressurized water will push any debris or leaves from the drains. Or you can buy a gutter vacuum. These types of gutter vacuums are designed with top-of-house access, so you do not have to climb ladders or step out onto the roof. Clean the drains regularly to reduce the risk of ponding water and algae on a flat roof.

Re-Pitching The Roof

A common problem is ponding water on a flat roof. This condition will lead to leaks on the roof if the water does not drain properly. When water is standing on a flat roof, it will eventually find its way into the gutter or drain. Eventually, the water will start to leak through the roof and into the interior. It will cause mold and a musty smell.

A qualified roofing contractor can fix the problem by re-pitching the roof. He can also install crickets to divert water and install additional drains. He can also repair or open existing drains. Some homeowners use less permanent methods to control the leaks, such as the Elastic 505 Puddle Plaster, which reduces the depth of the pond and the time it stays there.

If the water stays on the roof for more than 48 hours, re-pitching the roof will prevent the water from collecting. A roof is not meant to hold a lot of water, so you should consider a new material if ponding water occurs. You will also need to re-pitch the roof if you want to avoid future leaks. Ponding water is an indicator of a problem and should be addressed quickly.


Ponding water on a flat roof is a common problem in commercial buildings. It allows water to pool and provides the perfect environment for the growth of algae and mold. As water and mold spores are always in the air, they can cause an infestation quickly. Once you find mold, removing it will be a difficult task. Fortunately, there are a few easy steps you can take. Here’s how to get rid of mold on ponding water on a flat roof.

One of the first steps to eliminate a ponding water problem on a flat roof is to clean the area around the drainage pipe. This can be done by nearly anyone. Cleaning out the drain area regularly will help prevent ponding water from building up on your flat roof. Afterward, you can focus on preventing a ponding problem. Otherwise, you may end up paying for expensive repairs later.

Besides being unsightly, ponding water can also promote the growth of plants on your roof. As water sits on your roof, it can pick up dirt particles from the air and create a perfect environment for plants to grow. Saplings from nearby trees, weeds, algae, and mold will thrive in this environment. Not only will these plants ruin the structure of your roof, but they can also pose a health risk to those living inside.


One of the most common problems associated with flat roofs is ponding water. While it’s unlikely to cause a structural issue, water can still cause damage to a flat roof. Mildews, moss, and mold can grow on the water that pools on a flat roof. Fortunately, there are several preventative measures you can take to eliminate ponding.

If your flat roof is prone to ponding water, you should check its drainage system. If there are any low spots in the area, you can clean them and direct water away from your home. Similarly, if there are any drainage problems, you should consider laying an artificial slope material to redirect the water to your home’s drains. However, these measures may not solve the underlying problem.

Cleaning the drain areas of your flat roof is a simple, inexpensive, and easy DIY project that can help you prevent ponding water on your flat roof. The problem is typically caused by mildews, which thrive on moisture. If this issue persists, it’s best to address it before winter sets in. Clogged gutters and drains can also contribute to water ponding, making repairs to your flat roof necessary.


While ponding water on a flat roof doesn’t necessarily threaten your property, it can still damage it. For one thing, water on a roof magnifies the sun’s rays, shortening the lifespan of the outer roofing material. Additionally, it promotes the growth of algae, which erodes the roof membrane and deteriorates its seams. Moreover, standing water can also affect your gutters.

If you have a flat roof, ponding water is usually a sign of a clogged drainage system. If there is a blockage in the drain system, you should install additional drains. However, this solution may be costly, and if your building is in a high-precipitation region, additional drains may be required. In some cases, building owners don’t know they need additional drains until the roof is affected by a storm.

Cleaning the gutters and downspouts is another way to prevent ponding water on a flat roof. It’s not rocket science. A few simple steps will go a long way in preventing this issue. After a storm, cleaning the gutters and downspouts will reveal any clogged drainage system. Clean it thoroughly and you’ll be sure to see improvements in the drainage system within a few weeks.

Sagging Roof

If you notice that your roof is sagging, ponding water is the culprit. The reason for this is simple. During rain or snow events, ponding water collects on the flat roof’s topmost part. If this situation continues, it will eventually result in leaks. A good solution for this problem is a roof remodel. This process will eliminate ponding water and make your roof more sloped, but it can be expensive. If your budget does not allow you to make this costly fix, a silicone roof coating may be a better option.

Sagging roofs can also be the result of improper construction of the roof’s joints. Residential roofing systems are designed to handle a certain amount of weight. If they are too heavy, however, they will start to sag. This problem is more likely to occur in areas with significant snowfall and cold temperatures. Consequently, repairing a sagging roof is a top priority. If you do not have time to complete the repairs, ponding water could lead to even more serious problems down the road.

Another problem associated with ponding water is that it can lead to the growth of weeds and plants on the roof. Dirt particles can accumulate on the roof because of the moisture and dirt that can be found in a pool. This dirt creates an ideal growing environment for plants to take root. The soil and moisture can also encourage the growth of saplings from nearby trees and weeds. As a result, these organic growths can gradually chip away at the foundation of your roof and cause further structural damage.

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