Common Flat Roofing Problems and How to Fix Them

Leaks are one of the most common problems with flat roofs. Unlike pitched roofs, where water can easily run off, flat roofs tend to accumulate water, especially during heavy rains. Over time, this standing water can seep through the roofing material, leading to leaks and water damage inside the building.

Regular inspections are key to preventing leaks. Check for any cracks, blisters, or punctures in the roofing material. Ensure that the roof’s drainage system is functioning properly, as blocked drains can exacerbate water accumulation. If you notice any signs of leaking, patch the affected area immediately with a suitable sealant or roofing patch. For severe leaks, it’s best to call a professional roofer to assess and repair the damage.

Ponding water occurs when water collects in low spots on the roof and doesn't drain away. This can be a major issue for flat roofs, as standing water can accelerate the deterioration of the roofing material and lead to structural damage.

To prevent ponding, ensure that your flat roof is slightly sloped towards the drains. If you notice areas where water consistently pools, consider installing additional drains or scuppers to improve water flow. You can also use tapered insulation to create a slope that directs water towards the drainage system. If the problem persists, consult with a roofing professional to evaluate your options.

Blisters and cracks can develop on flat roofs due to trapped moisture or air beneath the roofing membrane. These issues are often caused by poor installation or aging materials. Blisters can eventually lead to cracks, which compromise the roof’s waterproofing capabilities.

Small blisters may not be an immediate concern, but it’s important to monitor them for growth. If blisters or cracks are present, it’s crucial to repair them promptly to prevent further damage. Cut out the blistered area, allow it to dry, and then patch it with new roofing material. For large or numerous blisters, it may be necessary to replace the entire section of the roof.

Flat roofs require regular maintenance to avoid common problems like leaks, ponding water, and shrinkage. Prompt attention to these issues can extend your roof’s life and prevent costly repairs. For more complex problems, consult a professional roofer to ensure your flat roof remains in top shape.