Water Intrusion Testing in Los Angeles, CA

Roof Leak Detection & Diagnostic Testing

HOA Property Inspections & Preventive Testing

Service Areas

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About Exterior Systems Construction

Exterior Systems Construction is a Los Angeles, CA exterior systems contractor that specializes in water intrusion testing, roofing, waterproofing, balcony and stair repairs, drainage solutions, and stucco and coatings. We serve homeowners, HOAs, property managers, and commercial clients across Los Angeles and the surrounding communities.

The company was built around one principle: do not guess — test first. By identifying exactly where water is entering a roof, wall, balcony, coating, or drain before recommending repairs, we help clients avoid unnecessary work, make better decisions, and protect their properties long term. You can reach us at (323) 206-6181 or rene@exteriorsystemsconstruction.com.

Why Los Angeles Property Owners Choose Exterior Systems Construction

Property owners choose Exterior Systems Construction because we find the source of the leak before anyone quotes a repair. Our professional water intrusion test starts at $299 and confirms what is actually failing — roof, wall, balcony, coating, or drainage — so the repair addresses the real problem.

• A diagnose-first process. We test before we repair, which helps property owners avoid unnecessary work and repeat leaks.
• The full building envelope, not just roofs. Roofing, waterproofing, water intrusion testing, balcony and stair repairs, drainage, stucco and coatings.
• Built for HOAs and managed properties. Scheduled inspections, water intrusion testing, preventive maintenance, and priority repair response for multi-unit, commercial, and managed buildings.
• A free property evaluation. We provide no-pressure evaluations to help identify roofing, waterproofing, and drainage issues affecting your property.
• Clear, responsive communication. Our team responds quickly and explains findings plainly so you can move forward with confidence.

Office hours are Monday through Friday, 7:00 AM – 4:30 PM, and Saturday, 7:00 AM – 1:00 PM. Call (323) 206-6181 to schedule.

Water Intrusion Testing Service Areas Across Los Angeles

Exterior Systems Construction serves Los Angeles, CA and the surrounding communities listed below. Frequently requested areas include water intrusion testing in Santa Monica, Culver City leak detection, and Downtown Los Angeles building envelope testing.

• Inglewood
• Playa Vista
• Koreatown
• Mid-Wilshire
• Hancock Park

Do not see your neighborhood listed? Call (323) 206-6181 or browse all Los Angeles service areas we cover.

Water Intrusion Testing FAQs

How do I find a water leak that is not visible?

Hidden water leaks are often found through a professional inspection that checks the roof, walls, ceilings, windows, doors, balconies, drainage areas, and other exterior systems. Exterior Systems Construction uses a diagnose-first approach to help identify where moisture may be entering before recommending repairs.

Do water leak detectors really work?

Yes, water leak detection methods can be very helpful when used by experienced professionals. Tools and testing methods can help locate moisture behind walls, ceilings, roofing systems, stucco, and other building materials that may not show visible damage right away.

Is a water leak detector necessary in California?

For many California properties, especially in areas like Los Angeles where buildings may deal with roof leaks, stucco cracks, balcony issues, and waterproofing concerns, leak detection can be a smart step. It helps property owners find the source of water intrusion before the damage spreads.

Is leak detection worth it?

Yes. Leak detection is worth it because it helps identify the actual source of the problem instead of guessing. This can prevent unnecessary repairs, reduce repeat issues, and help protect the property from long-term moisture damage.

Who to call to check for roof leaks?

You should call a qualified roofing and water intrusion specialist. Exterior Systems Construction provides roof leak detection, diagnostic testing, roofing inspections, waterproofing evaluations, and exterior system assessments for homeowners, HOAs, property managers, and commercial properties.

Does home insurance cover leak detection?

Home insurance coverage depends on your policy, the cause of the leak, and whether the damage was sudden or related to ongoing maintenance issues. It is best to contact your insurance provider directly and have a professional inspection report available to help document the condition of the property.

What is the best way to find a leak in your roof?

The best way to find a roof leak is through a professional roof inspection and diagnostic water intrusion test. A trained specialist can check roofing materials, flashing, drains, penetrations, edges, walls, ceilings, and nearby exterior systems to locate where water is entering.

What does moisture mapping mean?

Moisture mapping is the process of identifying and documenting areas where moisture may be present inside or behind building materials. It helps show the extent of water intrusion and can guide the next steps for repair, waterproofing, or further inspection.

What does a moisture map look like?

A moisture map may include marked areas on walls, ceilings, floors, roofs, or exterior surfaces where elevated moisture readings are found. It may be presented with notes, photos, inspection findings, or diagrams to help explain where moisture is showing up.

What is a water intrusion inspection?

A water intrusion inspection is a professional evaluation designed to find where unwanted water is entering a property. It may include checking the roof, building envelope, windows, doors, balconies, stucco, drainage, waterproofing systems, and other exterior components.

How to detect water intrusion?

Water intrusion can be detected by looking for stains, bubbling paint, soft drywall, musty odors, cracks, peeling finishes, mold-like growth, or damp flooring. However, hidden leaks often require professional testing, moisture analysis, and exterior system inspection to confirm the source.

Who is responsible for a water leak?

Responsibility depends on where the leak starts and the type of property. In a single-family home, the homeowner is often responsible for maintenance. In condos, HOAs, apartment buildings, or managed properties, responsibility may depend on governing documents, lease agreements, or whether the issue involves common areas, roofing, balconies, or exterior systems.

Do inspectors check for moisture?

Yes, many inspectors check for signs of moisture, especially when there are visible stains, leaks, musty odors, or exterior damage. A specialized water intrusion or building envelope inspection goes deeper by focusing on where moisture is entering and how it is affecting the structure.

Is testing for mold worth it?

Mold testing can be worth it when there are signs of moisture, musty smells, visible growth, or health concerns. Since mold is often connected to water intrusion, it is also important to find and correct the moisture source so the issue does not continue.

How to test a floor for moisture?

A floor can be tested for moisture using professional moisture meters, inspection tools, and surface evaluations. If moisture is found, the next step is to determine where it is coming from, such as a roof leak, wall leak, plumbing issue, balcony problem, or exterior water intrusion.