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  • Writer's pictureAndrew Putilin

Dealing with Ponding Water on Your Flat Roof: Solutions and Expert Advice


Image of flat roofs with ponding water in Portland Oregon and property managers not knowing what to do about it

As commercial roofing experts in Portland, Oregon, we at Flat Roof Pros Inc are here to share our knowledge and help property owners and managers make informed decisions when it comes to their flat roofs.

Ponding water can damage your roof and building seriously, so it's important to address this issue promptly and efficiently. We'll discuss the causes of ponding water, offer solutions to prevent and fix the problem and explain why Flat Roof Pros Inc is the perfect partner to help you with your flat roof needs.


Whether you're a hands-on owner looking to solve ponding water issues yourself or a commercial property manager seeking expert assistance, this post is for you.



What is Ponding Water and Why is it a Problem?


Ponding water occurs when water remains on a flat roof for 48 hours or longer, leading to the formation of a "pond" on the surface. This is an issue that should not be taken lightly, as ponding water can cause significant damage to your roof and the building structure.


Here's why ponding water is problematic:

  1. Damage to Roof Surface and Roofing Membrane: Ponding water can deteriorate your roofing membrane and cause cracking and mineral loss. This is because the constant movement of water can scrub away the protective layers of your roof, leaving it vulnerable to leaks and further damage.

  2. Increased Risk of Leaks: Prolonged exposure to ponding water can weaken your roofing membrane, making it more susceptible to leaks. Leaks can cause damage not only to the roof but also to the building's interior, leading to costly repairs and potential health risks due to mold and mildew growth.

  3. Structural Damage: In extreme cases, ponding water can add significant weight to your flat roof, leading to sagging, deformation, or even collapse.

  4. Shortened Roof Lifespan: The ongoing presence of ponding water can considerably reduce your flat roof's lifespan, resulting in more frequent repairs or replacements.

For commercial property managers, addressing ponding water is crucial to improving efficiency and preventing damage across multiple locations. In fact, 45.1% of property managers have expressed a desire to improve efficiency in their operations, making it vital to tackle any roofing issues that may arise.


Now that we know what ponding water is and why it's an issue, let's debunk some common misconceptions about flat roofs.


image taken by property manager in portland oregon of ponding on a flat roof for one of their locations


Flat Roofs: Common Misconceptions


A well-engineered flat roof should not have issues with ponding water. This leads us to a common misconception about flat roofs – that they are entirely flat. In reality, they are not.


Flat roofs are designed with a slight slope to facilitate proper drainage of rainwater, preventing the pooling of water on the surface. Portland's average annual rainfall is 36 inches, making it essential for flat roofs in the area to have effective water drainage systems. When constructed and maintained correctly, a flat roof should not have ponding water issues.


Now that we've clarified this misconception, let's explore the causes of ponding water on flat roofs. Understanding these causes is crucial for finding the right solutions to prevent and address this problem.




Causes of Ponding Water


There are several factors that can contribute to ponding water on a flat roof. By identifying the root cause of the problem, you can take appropriate action to resolve the issue and prevent it from recurring. Here are some common causes of ponding water on flat roofs:


  1. Insufficient Slope: As mentioned earlier, a properly engineered flat roof should have a slight slope to facilitate water drainage. If the slope is inadequate, water may not drain effectively, leading to ponding.

  2. Blocked or Inadequate Drainage: A flat roof's drainage system can become clogged with debris, such as leaves, twigs, and dirt, preventing water from draining as it should. Additionally, if the drainage system is not designed to handle the volume of water generated during heavy rainfall, it can become overwhelmed, resulting in ponding water.

  3. Structural Issues or Damage: Over time, the structure of a building can shift or settle, leading to changes in the roof's slope and creating low spots where water can collect. Damage to the roofing membrane or other components of the roof system can also result in ponding water.


Now that we've discussed the causes of ponding water, let's explore some solutions to help you address and prevent this issue on your flat roof.



flat roof professional from Flat Roof Pros Inc fixing ponding water for a building in portland oregon


Solutions to Ponding Water


To address and prevent ponding water on your flat roof, consider the following solutions. These strategies can help protect your investment, extend the life of your roof, and avoid costly damage to your property:


  1. Regular Maintenance and Inspection: Regularly inspecting and maintaining your flat roof can help identify and address potential issues before they escalate. Remove debris, such as leaves and twigs, from the roof surface and drainage system to ensure proper water flow. Additionally, inspect the roof membrane for damage and make necessary repairs as needed.

  2. Proper Drainage Systems: Ensure that your flat roof has a well-designed and functioning drainage system. This includes installing adequate drains, scuppers, and gutters to handle the volume of water generated during heavy rainfall. Regularly check and clean these components to prevent blockages and ensure efficient water removal.

  3. Roof Leveling or Sloping Solutions: If your flat roof has an insufficient slope or has developed low spots due to structural issues, consider leveling or re-sloping the roof to promote proper drainage. This may involve adding tapered insulation or crickets to create the necessary slope or adjusting the roof's structure to address any sagging or deformation.

  4. Roof Membrane Options (TPO and EPDM Roofing): The choice of roofing membrane can also play a role in preventing ponding water. TPO (Thermoplastic Olefin) and EPDM (Ethylene Propylene Diene Monomer) roofing membranes are popular options for commercial flat roofs due to their durability, flexibility, and resistance to ponding water. Consult with a qualified flat roof contractor to determine the best membrane option for your specific needs.


In the next section, we'll discuss how Flat Roof Pros Inc can help you tackle ponding water issues and provide expert solutions for your flat roof.




How Flat Roof Pros Inc Can Help


As a leading flat roof contractor in Portland, Oregon, Flat Roof Pros Inc has the expertise and experience to help you address and prevent ponding water issues on your commercial flat roof. Our team is committed to providing the best solutions for property owners and managers in Multnomah County and the surrounding areas. Here's how we can help:


  1. Expertise in Commercial Roofing: With years of experience in the industry, our team is well-versed in commercial roofing best practices and the latest technologies. We understand the unique challenges of flat roofs and can provide tailored solutions to meet your specific needs.

  2. Services Tailored to Multnomah County and Portland, Oregon: We are proud to serve the Portland area, where we have a deep understanding of local weather conditions, building codes, and regulations. This knowledge allows us to provide solutions that are suited to the unique needs of commercial properties in the region.

  3. Free Inspection and Professional Opinion: To help you make informed decisions about your flat roof, we offer a free inspection by one of our professionals. During this inspection, we will assess your roof's condition, identify any issues, and provide expert recommendations on the best course of action to address ponding water or other concerns.

  4. Solutions for Commercial Property Managers: If you're a commercial property manager overseeing multiple locations, we can help you develop and implement a comprehensive plan to address ponding water and other roofing issues across your properties. This proactive approach can improve efficiency, reduce maintenance costs, and extend the life of your flat roofs.


In the next section, we'll discuss the importance of working with a qualified flat roof contractor to ensure the best results for your commercial property.



image of a good flat roof that is maintained by flat roof pros inc in PDX


Importance of Working with a Qualified Flat Roof Contractor


Choosing the right flat roof contractor is crucial to the success of your roofing project and the long-term health of your flat roof. When you work with a qualified contractor like Flat Roof Pros Inc, you can expect the following benefits:


  1. Experience and Expertise in the Industry: A reputable flat roof contractor has the necessary knowledge and skills to address a wide range of roofing issues, including ponding water. They can provide expert advice and solutions based on years of experience in the field.

  2. Knowledge of Local Weather Conditions and Regulations: A local contractor is familiar with the unique challenges presented by Portland's climate and can recommend solutions tailored to these conditions. They will also be aware of local building codes and regulations, ensuring your roofing project complies with all relevant requirements.

  3. Ability to Provide Long-lasting Solutions: A qualified flat roof contractor can recommend and install roofing materials that are designed to withstand ponding water and other issues commonly faced by flat roofs. They can also provide guidance on proper maintenance and care to extend the life of your roof.


With these benefits in mind, let's discuss how you can book a free inspection with Flat Roof Pros Inc to get started on addressing ponding water issues on your flat roof.



Book Your Free Inspection Today


If you're concerned about ponding water on your flat roof or simply want to ensure your roof is in optimal condition, don't hesitate to book a free inspection with Flat Roof Pros Inc. Here's what you can expect when you schedule your inspection:


  1. Contact Information for Flat Roof Pros Inc: Get in touch with us by phone at (503) 776-1111 or by submitting a form to schedule your free inspection. Our friendly and knowledgeable team will be happy to answer any questions you may have and set up a convenient time for our professionals to visit your property.

  2. Benefits of Scheduling a Free Inspection: A free inspection provides you with valuable information about the current state of your flat roof and any potential issues that may require attention. Our professionals will assess your roof's condition, identify the root cause of any ponding water, and recommend the best course of action to address these concerns.

  3. Take Action to Protect Your Investment: By addressing ponding water and other roofing issues promptly, you can protect your commercial property from costly damage and extend the life of your flat roof. Don't wait until problems become more severe - book your free inspection today and take the first step toward a healthier, more efficient roof.


In conclusion, addressing ponding water on your flat roof is crucial to maintaining the integrity of your property and avoiding costly damage. Trust Flat Roof Pros Inc to provide expert solutions and professional advice to help you tackle this common issue. Schedule your free inspection today and let us help you protect your investment.

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