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A Water Leak Case Study

We had an interesting week with two separate clients calling about unknown water leaks. In both homes, we found that there had been a small water leak, but from an unknown source. We did our normal routine—first a visual inspection, and second, we pulled out our protimeter. The protimeter is a great way for us to look behind the walls and get a better idea of where there is moisture. It does this by quickly penetrating the wall or floor with a radio wave.

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In both homes, we could see that there had been some moisture behind the sheetrock or directly on the wall. The first home had another restoration company that had tried its best to find the water leak but was unable to pinpoint the problem. They had made a cut in the wall and taken out mold, but didn’t see any source of water. I’m sure it must have been baffling to them, as it was to us at first. But we kept searching. We pulled down the insulation from the wall in each home. When we did this in the second home, we found black mold and quickly set up a containment barrier with a HEPA filter. This is a precautionary step to prevent mold from spreading further.

Containment barrier: This helps seal in spores from black mold. Inside is a HEPA filter that removes harmful particles and debris.

We had hoped that without the insulation, we would easily be able to see the water leak. But removing the insulation did nothing to reveal the problem. Our mysterious water leak seemed to have no origin. We checked the wall with our camera and still saw no water pipe or leaking source.

It started to become apparent that our mysterious water leak was coming from the foundation wall of the home. Our inspection quickly led us to the outside of the house. Nothing seemed out of the ordinary. We began spraying water down the outside of the foundation. Within minutes, the foundation had sprung a leak, and we had found our culprit!

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Sources of Mold

A foundation A foundation leak caused both water damage and mold growth.

You couldn’t believe the shock and gratitude of each homeowner that we had found the source of the leak. We will now begin the steps for both mold remediation and well as water remediation. We found that a little dedication and detective work go a long way when you’re helping someone in need…especially in the case of an unknown water leak!

Frequently Asked Questions

Sometimes water isn’t coming from a typical pipe or fixture inside your walls. It can enter from outside sources, such as foundation cracks or leaks in the exterior structure, then travel through materials and show up far from the actual entry point, as was discovered by spraying water outside the foundation in the article.

RainFire Restoration professionals often use moisture detection tools like a protimeter, infrared cameras, and other moisture meters to detect elevated moisture behind walls, under floors, and in unseen areas before cutting or opening up the building materials.

Insulation can mask where moisture is traveling and hide the actual source of a leak. Removing insulation helps inspectors see deeper into the wall assembly and locate where water is entering so they can repair it and prevent further damage.

Yes — hidden water leaks can create moisture that supports black mold growth behind walls and in insulation long before visible stains or drips show up, requiring containment and professional mold remediation to prevent contamination and health risks.

When water is entering from the exterior, technicians may need to inspect and address foundation waterproofing, grading issues, or exterior water intrusion points. Once the source is found and fixed, water remediation and mold mitigation inside the home can begin.

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About the Author: Alan Seegrist

Alan Seegrist is the co-founder of RainFire Restoration and a certified restoration expert with over eight years of hands-on experience in water, fire, mold, and smoke damage recovery. Known for his calm leadership and deep technical knowledge, Alan leads with a commitment to quality, compassion, and helping Utah families rebuild after disaster. His insights reflect real-world experience restoring over 1,000 homes and guiding clients through every step of the recovery process.
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