Exterior Water Leak Detection in Los Angeles
You have water damage inside your building, and you need to find out where it is coming from. If the problem appears during or after rain, and there is no plumbing above or behind the damaged area, you are dealing with an exterior water leak. Absolute Maintenance & Consulting provides professional water leak detection for Los Angeles properties focused entirely on building envelope failures: the roof, walls, windows, doors, and foundation components that are supposed to keep water out.
We are not plumbers. We do not detect pipe leaks. What we do is find where and how water enters your building from the outside using thermal imaging, moisture mapping, and ASTM E1105 water testing. These are the same diagnostic methods used in our comprehensive water intrusion investigations, applied here to isolate the specific leak you are experiencing.
Cameron Figgins, founder of Absolute Maintenance & Consulting, has spent over three decades tracking down exterior water leaks in Los Angeles County buildings. We hold CSLB license #998184, IICRC certification (#70018676), and MICRO certification. Our detection assessment starts at $450 and is credited toward your repair cost.
How Do You Know If Your Leak Is Coming from Outside?
Not every water stain is a plumbing problem. Here is how to tell whether your leak is an exterior water intrusion issue that Absolute Maintenance & Consulting can solve:
Signs that point to an exterior leak:
- Water stains or wet spots that appear during or within 24 hours after rain
- Damage on walls or ceilings that face the building exterior with no plumbing above
- Leaks that stop when the weather dries and return when it rains again
- Mold growth along exterior-facing walls, closets, or baseboards
- Water at the base of windows or sliding glass doors after storms
- Peeling paint or bubbling drywall on walls adjacent to stucco, siding, or brick
Signs that point to a plumbing leak (call a plumber):
- Water stains appear regardless of weather
- The wet area is directly below a bathroom, kitchen, or laundry
- You hear running water when no fixtures are in use
- Your water bill has increased unexpectedly
If your symptoms match the exterior leak pattern, call (310) 678-4345. We will confirm whether it is a building envelope issue during an initial phone consultation before scheduling an on-site assessment.
Our systematic inspection focuses on the four areas where Los Angeles buildings fail most often:
- Walls & Stucco – cracks, failed sealants, deteriorated weather barriers
- Windows & Doors – failed caulking, improper flashing, frame settling
- Roofing – damaged membranes, failed flashing, cracked tiles, flat roof failures
- Foundations – hydrostatic pressure cracks, failed waterproofing, groundwater intrusion
Absolute Maintenance & Consulting tests each zone methodically using ASTM E1105 water testing — the same standard used in forensic investigations and insurance claim documentation. ASTM E1105 applies controlled water pressure to exterior surfaces to simulate wind-driven rain conditions and confirm the exact breach point. Findings are documented with thermal images, moisture readings, and time-stamped photographs. No exploratory demolition is required unless findings require physical confirmation.
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How We Detect Exterior Water Leaks
Finding an exterior water leak is not the same as finding a plumbing leak. You cannot just pressurize a pipe and listen. Water enters the building envelope at one point, travels through the wall assembly along framing, sheathing, and insulation, and shows up on the interior in a completely different location. Tracing that path requires diagnostic tools that see through finished surfaces.
Absolute Maintenance & Consulting uses three primary detection methods. Each one is a standalone service we offer as part of our water intrusion investigation practice, and we deploy all three on every exterior leak detection assessment:
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- [Thermal Imaging Leak Detection](https://absolutemaintenanceconsulting.com/water-intrusion-los-angeles/thermal-imaging-leak-detection/). Our FLIR infrared cameras detect temperature differences caused by hidden moisture behind walls, ceilings, and floors. Wet materials cool through evaporation, creating thermal signatures that are invisible to the eye but clear on our cameras. Thermal imaging reveals the full extent of moisture inside the wall assembly and often shows the path water traveled from the entry point.
- [Moisture Mapping](https://absolutemaintenanceconsulting.com/water-intrusion-los-angeles/moisture-mapping/). We use professional-grade pin and pinless moisture meters to take 20 to 50+ readings across the affected areas. These quantitative readings confirm every thermal anomaly and create a documented moisture map showing exactly where water is present and where the structure is dry. The moisture gradient points back toward the source.
- [ASTM E1105 Water Testing](https://absolutemaintenanceconsulting.com/water-intrusion-los-angeles/astm-e1105-water-testing/). When we need to reproduce and confirm a specific leak path, we apply controlled water to targeted sections of the exterior following ASTM E1105 standards. This is the definitive test for isolating the exact entry point. We test one area at a time, starting low and working up, so we can pinpoint precisely where the building envelope fails.
Together, these methods give us a complete picture: where water enters, how it travels, and how far the damage extends. No guesswork. No exploratory demolition. Just data-driven detection that leads directly to targeted repair.
Failed caulking, improper flashing installation, and building settlement create gaps around window and door frames. During storms, wind-driven rain forces water through these gaps and into surrounding wall cavities.
We use infrared scanning to identify moisture accumulation around frames, headers, and sills. Our moisture meters confirm saturation levels in framing members and adjacent drywall, revealing damage that visual inspection misses entirely.
Cracked tiles, failed membranes, deteriorated flashing around vents and chimneys, and ponding water on flat roofs all allow water into your building. The tricky part is that roof leaks often appear far from where water actually enters.
Our thermal imaging traces moisture from ceiling stains back to the actual roof penetration point. We identify saturated decking, wet insulation, and active leak pathways so repairs address the source rather than just the symptoms. Learn more about water damage caused by roof leaks.
Groundwater and poor drainage create hydrostatic pressure against foundation walls. Los Angeles expansive clay soil makes this worse because soil swells when wet and pushes against concrete. Cracks form and water seeps into basements, crawl spaces, and slab-on-grade construction.
We map moisture intrusion through foundation walls and slabs, identifying active seepage points, failed waterproofing membranes, and areas where groundwater pressure is compromising the structure.
Persistent foundation moisture requires crawl space or foundation waterproofing after the intrusion point is sealed.
While walls, windows, roofing, and foundations are our specialty, we detect water intrusion from any exterior source including balcony failures, planter box leaks, deck waterproofing failures, and mechanical penetrations. If water is getting into your building from outside, we find where and why.
Where Do Exterior Water Leaks Happen in Los Angeles?
After three decades of detecting exterior leaks across Los Angeles, we find the same failure points on property after property. LA construction has specific vulnerabilities because the mild climate led builders to cut corners on waterproofing details, assuming heavy rain would be rare. That assumption breaks down every rainy season.
|
Leak Location |
Common Cause |
Detection Method |
|
Stucco walls |
Cracked stucco, missing weep screeds, no drainage plane behind stucco |
Thermal imaging + moisture mapping of full wall assembly |
|
Windows and doors |
Missing sill pans, aged perimeter sealant, improper flashing |
Moisture mapping around frames + ASTM E1105 isolation testing |
|
Roof-to-wall transitions |
Failed step flashing, missing kick-out diverters, improper counter-flashing |
Thermal imaging from interior + exterior visual assessment |
|
Roof penetrations |
Cracked boots around pipes, failed flashing around skylights, chimney flashing gaps |
Thermal imaging of ceiling + targeted water testing |
|
Foundation and grade |
Ground water pressure, surface drainage toward building, missing below-grade membrane |
Moisture mapping at base of walls + exterior drainage assessment |
|
Decks and balconies |
Failed waterproofing membrane, improper ledger board flashing |
Moisture mapping below deck level + thermal imaging of adjacent walls |
For stucco-specific leak detection, see our dedicated stucco leak detection page. For full-scope assessment of every envelope component, see our building envelope inspection service.
What Happens After We Find Your Leak?
Detection is the first step, not the last. Once we locate the entry point, map the moisture extent, and document the findings, you have a clear path to repair.
Your detection report includes: thermal images showing moisture location, a quantitative moisture map, photos of exterior deficiencies, the identified entry point(s), and a recommended repair scope. The report is delivered within 48 hours of your on-site assessment.
Absolute Maintenance & Consulting is not a detection-only company. We investigate and repair. Your $450 assessment fee is credited toward repair work if you hire us. Depending on what we find, your repair may involve:
- Wall leak repair to fix the exterior breach and restore damaged interior materials
- Ceiling leak repair for roof or upper-story water intrusion
- Rain leak repair for storm-driven water entry
- Stucco water intrusion repair for stucco envelope failures
- Mold remediation if hidden mold is found during the detection process
The investigation-to-repair process is seamless because the same team that finds the leak fixes it. No handoffs to other contractors, no repeated diagnostic work, and no gaps in accountability.
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How Much Does Water Leak Detection Cost?
|
Service |
Price |
|
Exterior water leak detection assessment |
Starting at $450 |
|
Assessment fee credited toward repair |
$450 credited toward repair cost |
|
ASTM E1105 water testing (add-on for complex leaks) |
Quoted per test area |
|
Commercial / multi-unit detection |
Custom quote based on building size |
The $450 covers: on-site assessment with thermal imaging, moisture mapping at 20 to 50+ measurement points, interior and exterior evaluation, identification of entry points, and a written report with repair recommendations. ASTM E1105 water testing is available as an add-on when controlled testing is needed to confirm suspected leak locations on complex buildings.
For larger properties or multi-unit buildings, call (310) 678-4345 for a custom quote. Commercial detection reports are formatted for property managers, HOA boards, and insurance adjusters.
Why Choose Absolute Maintenance & Consulting?
We specialize in exterior water intrusion. Not plumbing. Not general home inspection. Absolute Maintenance & Consulting was founded specifically to find where water enters buildings from the outside and repair the building envelope. Cameron Figgins has spent over three decades doing this work across Los Angeles County.
We use diagnostic tools, not guesswork. Every assessment includes thermal imaging and moisture mapping. When the source is not immediately evident, we deploy ASTM E1105 water testing to reproduce the leak under controlled conditions.
Detection leads directly to repair. Your assessment fee is credited toward the fix. The same team that finds your leak performs the water intrusion repair. No middlemen, no repeated diagnostics.
We carry the right credentials. CSLB license #998184, IICRC certification (#70018676), and MICRO certification. We are licensed, certified, and insured to detect leaks, remediate mold, and repair your building envelope.
We understand Los Angeles construction. Stucco, clay tile roofing, hillside drainage, mid-century flat roofs. The building stock in LA has specific vulnerabilities that national companies miss. We have detected leaks on hundreds of properties across LA County and know exactly where to look.
Frequently Asked Questions
How do I find out where a water leak is coming from?
For exterior water leaks, professional detection uses three methods: thermal imaging to see hidden moisture behind walls and ceilings, moisture mapping to quantify moisture levels and trace the path back to the source, and ASTM E1105 water testing to reproduce the leak under controlled conditions. If your leak appears during or after rain, call Absolute Maintenance & Consulting at (310) 678-4345 for an exterior water leak detection assessment.
How much does it cost to detect a water leak?
An exterior water leak detection assessment from Absolute Maintenance & Consulting starts at $450 for residential properties. That includes thermal imaging, moisture mapping, on-site evaluation, and a written report. The $450 is credited toward repair if you hire us. Plumbing leak detection is a different service with different pricing. We focus exclusively on exterior and building envelope leaks.
Is water leak detection covered by homeowners insurance?
Most homeowners insurance policies cover the resulting water damage from a sudden leak but do not pay for the detection itself. However, the detection assessment and report we provide serve as documentation that supports your damage claim. Long-term building envelope deterioration (aged stucco, worn sealant) is typically classified as maintenance and not covered. We provide detailed reports that help your adjuster determine what qualifies for coverage.
What is the difference between exterior leak detection and plumbing leak detection?
Plumbing leak detection locates failures in pipes, supply lines, and drain lines inside your building. Plumbers use pressure testing and acoustic equipment. Exterior leak detection locates failures in your building envelope: the roof, walls, windows, doors, flashing, and waterproofing that keep rain and groundwater out. Absolute Maintenance & Consulting uses thermal imaging, moisture mapping, and ASTM E1105 testing. If your leak correlates with rain, you need exterior detection.
Can you find a leak without tearing out walls?
Yes. Thermal imaging detects moisture behind walls, ceilings, and floors without any demolition. Moisture meters measure through finished surfaces. ASTM E1105 water testing reproduces the leak from the exterior while we monitor the interior. In some cases we may recommend a small exploratory opening to confirm findings, but we always discuss that with you first and only proceed with your approval.
How long does exterior water leak detection take?
A residential exterior leak detection assessment typically takes 2 to 4 hours on site, depending on the size of the affected area and whether ASTM E1105 water testing is needed. Commercial properties take 4 to 8+ hours. You receive your complete report within 48 hours of the on-site visit.
Still have questions? Our experts are here to help.
Service Area
Absolute Maintenance & Consulting performs building envelope inspections throughout Los Angeles County, including West Los Angeles, Santa Monica, Venice, Culver City, Beverly Hills, Brentwood, Bel Air, Century City, Hollywood, Silver Lake, Echo Park, Pasadena, Glendale, Studio City, Sherman Oaks, Encino, and the South Bay communities.
Call (310) 678-4345 or email info@leakmoldrepair.com to schedule your building envelope inspection.