What is ponding water on flat roof and how to prevent it.
Ponding water on a flat roof can lead to a wide range of issues, from cosmetic problems to structural damage. In this blog post, we’ll discuss the causes and consequences of ponding water on a flat roof, and how to prevent and address the issue.
What is ponding water on a flat roof?
Ponding water occurs when water accumulates on a flat roof and does not drain properly. This can happen due to various reasons such as a lack of slope, blocked drainage, or damage to the roofing system. Ponding water on a flat roof is defined as any standing water that lasts for more than 48 hours.
Consequences of Ponding Water on a Flat Roof
Ponding water on a flat roof can cause several issues, including:
Structural Damage
Ponding water on a flat roof can cause damage to the underlying structure, including the deck, support beams, and even the foundation. The weight of the water can cause the roof to sag or bow, leading to structural instability.
Roof Leaks
Ponding water on a flat roof can also lead to leaks. Over time, the weight of the water can cause the roofing material to weaken, which can lead to cracking and leaks.
Mold and Mildew Growth
Standing water can create a breeding ground for mold and mildew. This can lead to respiratory issues, particularly in people with allergies or asthma.
Preventing Ponding Water on a Flat Roof
Preventing ponding water on a flat roof is essential to maintain its longevity and effectiveness. Here are some measures that can be taken to prevent ponding water:
Regular Roof Inspections
Regular roof inspections can help detect issues that can lead to ponding water. Any damage, such as cracks or punctures, should be repaired immediately.
Proper Drainage
Proper drainage is crucial in preventing ponding water on a flat roof. Ensure that drains and gutters are clean and clear of debris to allow water to flow freely.
Slope Correction
Flat roofs should have a slight slope to allow water to drain. If there is a low spot or an area that holds water, it can be corrected by adding additional layers of roofing material to create a slope.
Additional Roofing Layers
Adding additional layers of roofing material to a flat roof can help prevent ponding water by creating a slope.
Addressing Ponding Water on a Flat Roof
If ponding water has already occurred on a flat roof, it's essential to address the issue immediately to prevent further damage. Here are some measures that can be taken to address ponding water:
Remove Standing Water
Standing water should be removed immediately to prevent any further damage. A squeegee or a wet/dry vacuum can be used to remove the water.
Repair the Roof
Any damage to the roofing system, such as cracks or punctures, should be repaired immediately to prevent water from seeping into the roof.
In conclusion, ponding water on a flat roof can cause various issues, including structural damage, roof leaks, and mold growth. Preventing ponding water through regular inspections, proper drainage, slope correction, and additional roofing layers is crucial in maintaining the effectiveness of a flat roof. If ponding water has already occurred, removing standing water and repairing any damage to the roofing system can prevent further damage.
