10/05/2026
How Do You Find the Source of Leaks on the Exterior of a Home?
The short answer: Investigate how rainwater could potentially enter the home. This includes checking gutters, downspouts, grading and landscaping, exterior penetrations, and other areas that may allow water to travel toward or into the structure.
Finding an exterior water leak isn’t always as simple as looking for a hole.
Water can enter at one location and travel behind walls, ceilings, or other building materials before the moisture becomes visible inside the home. That’s why a professional moisture investigation should look at both the symptoms inside the property and potential water-entry points outside.
How Do Professionals Find Hidden Moisture?
Professional water-damage and leak-detection companies may use specialized moisture-detection equipment to identify areas of elevated moisture that aren’t obvious through a visual inspection alone.
Depending on the situation, this can include moisture meters, thermal imaging, and other diagnostic equipment.
Instead of guessing, we’re gathering information that helps answer:
Where is the moisture? Where could the water be coming from? And what exterior condition could be allowing it to enter?
How Much Does a Moisture or Exterior Leak Inspection Cost?
Pricing depends on how extensive the investigation needs to be.
A technician service/diagnostic visit may start at approximately $150.
More comprehensive moisture investigations can typically range from approximately $350–$700, depending on the level of inspection, testing and diagnostic work required.
Need Help Identifying Where Water Is Coming From?
Precision Plus Plumbing provides professional plumbing leak detection, water-damage investigation and emergency water-damage services throughout Greater Philadelphia, New Castle County, Delaware, and New Jersey.
The objective isn’t simply to find what’s wet.
It’s to understand why it’s wet.
Learn more about our leak detection and water-damage services at:
Precision Service Experts
Derrick Jackson
Industry Disruptor | Master Plumber | Certified Mold & Water Damage Restoration Consultant | Author of Got Mold? & Precision Service Experience