Discover the Causes of Puddles on a Flat Roof and Their Implications
Puddles on a flat roof are common, and many homeowners don't consider ponding water a problem because of the roof's structure. However, ponding water on a flat roof can cause severe problems and costly repairs.
Puddles on a flat roof are common, and many homeowners don't consider ponding water a problem because of the roof's structure. However, ponding water on a flat roof can cause severe problems and costly repairs.
Let's discuss what causes puddles on flat roofs and why they're a problem.
What causes puddles on a flat roof?
Puddles can appear on a flat roof after heavy rain, a storm, or when the snow melts. This may sound perfectly normal; a flat roof is flat, so the water can't automatically slide off like sloped roofs. However, flat roofs do have a slight slope to encourage drainage. So it's natural to wonder why puddles appear on such roofs.
Drainage issues
Ponding water on a flat roof often arises from improper drainage. Slow-moving or clogged drains aren't efficient and can't handle a high water volume.
Improper installation
Flat roofs aren't completely flat. They need an installation with a slight pitch that should guide the water toward the drains. Water could accumulate at the roof's lowest points if the roof isn't installed correctly.
Compressed insulation
Not every flat roof can handle foot traffic or accommodate heavy items. When such roofs are misused, the insulation can compress and create a low spot that can collect water. Over time, the weight of the water can worsen the problem and cause leaks.
Improper installation of roof features
Skylights and plumbing vents are often installed with small dips that can collect water and cause numerous issues. Therefore, hiring a reputable company to install such roof features is essential.
Structural issues
Buildings settle over time, potentially affecting the roof structure. If the roof slope settles even a bit, you could be looking at ponding water.
HVAC leaks
HVAC equipment stored on the roof can cause ponding water if the roof can't handle the weight. However, ponding water could be normal condensation, and the problem could lie in improper drainage.
What problems can ponding water cause?
Ponding water on a flat roof can lead to several issues:
Vegetation growth
If the puddles have been on the roof for a while, they could lead to moss and algae development. Over time, the plants' roots can jeopardize the roof's structure, damage the insulation, and bring moisture into the building.
Roof leaks
Since water puddles damage the roof materials, roof leaks increase significantly. Once homeowners spot a leak on the ceiling, the roof may require extensive (and costly) repairs.
Roof collapse
This is the worst-case scenario for every property owner. The accumulating water can damage the materials under the roof, which can break down and collapse. But, of course, this doesn't happen overnight.
Let the professionals handle it all
Ponding water on a flat roof is never a good sign, and even the smallest puddles can cause significant damage in the long run. Property owners who want to ensure their flat roof is in excellent condition should hire professionals. Trained technicians can examine the roof, perform regular maintenance and repairs, and offer valuable advice on keeping it in top shape.
Master Pro Services provides expert roofing repair and replacement in Richmond, Chesterfield, Midlothian, Hopewell, Ashland, Glen Allen, Moseley, Fort Lee, and surrounding areas. Our services encompass all residential and commercial roofing structures, including flat roofs, Dimensional, three-tab, designer shingles, metal roofing, EPDM roof membranes, thermoplastic roof membranes (TPO), as well as windows, gutters, and other roofing components. Financing is available. BBB member. Call us now at (804) 552-5007.
