What to do if your roof still leaking after being waterproofed

Waterproofing your roof stands as a vital step in protecting your home. It’s meant to form an unyielding barrier against water infiltration, safeguarding your property from potential harm. Yet, what should you do if, following the waterproofing of your roof, you observe persistent leaks? In this blog, we’ll delve into the prevalent causes of leaks post-waterproofing and offer guidance on effectively managing this concern.

Common Causes of Leaks After Waterproofing

Inferior Craftsmanship: One of the most common culprits behind post-waterproofing leaks is substandard workmanship during the application of waterproofing materials. If the initial waterproofing job was executed poorly, it can expose vulnerabilities and lead to leaks.

Age and Wear: Even the sturdiest waterproofing materials can deteriorate over time due to weathering, UV rays, and general wear and tear. This degradation can create breaches in the waterproofing system.

Cracks and Damages: Pre-existing cracks or damages in the roof substrate or structure can compromise the efficacy of the waterproofing membrane. Even with new waterproofing, these issues may persist.

Neglected Maintenance: Neglecting routine inspections and maintenance of your roof can result in issues. Accumulated debris, obstructed drains, and unattended damage can undermine your waterproofing system.

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What to Do When Your Roof Keeps Leaking

Evaluate the Situation:** Begin by determining the extent of the issue. Is the leak minor or substantial? Identify the affected area and appraise potential causes.

Seek Professional Guidance:** Reach out to a qualified roofing and waterproofing professional. They can perform a comprehensive inspection to pinpoint the leak’s source and recommend the most suitable action.

Contemplate Repairs or Retrofitting:** Depending on the assessment, you might require repairs to the existing waterproofing system or, in certain instances, a complete overhaul of the waterproofing materials. A professional can offer direction on the most fitting solution.

Routine Maintenance:** Moving forward, commit to regular roof inspections and maintenance. Preventive measures can significantly prolong the life of your waterproofing system.

Reflect on Future Upgrades:** If your waterproofing system is outdated or lags behind industry advancements, it could be time to explore modern, more advanced waterproofing materials and techniques.


Discovering a roof leak subsequent to waterproofing can be disconcerting, but it’s a situation that can be capably resolved. The crux lies in swift action, consultation with professionals, and consideration of necessary repairs or enhancements to ensure that your roof maintains its robust defense against the elements. Waterproofing represents an investment in your property’s future, and by taking the right steps, you can continue to enjoy its advantages for years to come.

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