Water leaks have remained a constant, expensive, and often misunderstood issue in modern architecture. The visual appearance of a leak completely changes the occupant’s opinion of a property from good to very bad. But the damage goes far beyond aesthetics. Unchecked water intrusion leads to structural degradation, hazardous mold growth, devalued assets, and costly litigation.
Leaks can penetrate masonry walls, window walls, high-rise curtain walls, slab edges, residential windows, panel systems, copings, and roofing. On the interior, leaks are often seen at the tops of windows, window sills, and at floor levels. What makes them so difficult to diagnose is that the water path can be convoluted, or even multiple, and a single leak can have several contributing sources.
At Facade Consultants, water leaks are among the top complaints we investigate and fix. Having worked on hundreds of buildings throughout the United States, we have developed a systematic, evidence-based methodology to identify the root cause of water intrusion and develop effective, permanent solutions.
Sealant Failure Analysis
Sealants are one of the most common points of failure in leaking buildings. Long-term sealant performance is directly affected by joint design, substrate preparation, material selection, and building movement. Failures often occur when sealants accommodate movement they were not designed to handle, or when improper cleaning creates weak bond lines. Our forensic analysis determines whether failures are due to material defects, installation errors, design deficiencies, or a combination of these factors, providing critical information for construction defect litigation.
Window Wall Leaks
Window wall systems can experience water intrusion, particularly in mid-rise and high-rise buildings. These systems rely on multiple components working together, including glazing, framing, drainage paths, and perimeter interfaces with adjacent construction. Leaks can occur when drainage provisions are blocked, flashing is incomplete, or sealant and gaskets deteriorate over time. Even small installation deviations can allow water to bypass intended drainage paths and migrate into interior spaces. Window walls typically rely upon a subsill, which is an integral gutter that runs below all of the windows. Subsills collect water coming from above and drain it to the exterior. Areas where they can fail: 1) Poorly sealed fastener penetrations through the subsill 2) Poor or missing end dams and 3) Thermal break shrinkage. Because window wall assemblies are repetitive, a single defect detail can be repeated across dozens or hundreds of units, leading to widespread leakage rather than isolated incidents.
Sliding Door Leak Investigation
Sliding glass doors are especially vulnerable to water intrusion because they combine large openings with moving parts. Tracks, rollers, weep systems, and seals must all function correctly. Leaks commonly occur when drainage paths become blocked, sill flashing is missing, or door thresholds are set too low. Sliding doors may leak only during specific weather events, making diagnosis without controlled testing difficult. We employ targeted testing protocols to recreate leak conditions and isolate the point of failure.
Residential Window Leak Investigation
Residential window leaks can result from improper installation, defective products, or both. Labor quality and product design in residential construction are generally weaker than in commercial projects. Installers vary widely in education and experience, and some manufacturers have survived without testing their products or providing adequate installation instructions. Diagnosing leaks in residential buildings may require removing exterior or interior finishes to identify breaches in the water management layer. For homeowners considering litigation against installers or manufacturers, our forensic documentation provides the evidence needed to support a claim.
Slab Cover & Edge Leak Investigation
Slab covers protect floor edges and conceal transitions between floor slabs and facade systems. When improperly detailed or sealed, they become a direct pathway for water intrusion at joints, fastener penetrations, or glazing system interfaces.
Curtain Wall Leaks
Curtain wall systems are complex assemblies made up of multiple components that work together to manage and repel water. Hopefully there are internal redundant systems that manage water, but this is not always the case. If one or more system fails, water can bypass intended drainage paths and enter the building. Leaks can occur at stack joints, perimeter interfaces, splice sleeves, and transitions between curtain wall framing and adjacent construction. Differential movement, incomplete sealing, and blocked internal drainage can all compromise system performance over time. Because curtain walls are often designed to manage water internally rather than block it entirely at its surface, identifying failures requires an understanding of how the system was intended to perform.
Concealed Leak Investigation: Leaks Inside Walls
Water intrusion inside wall cavities can remain hidden for years, causing wood rot, steel corrosion, and hazardous mold growth. Visible interior damage is often the final symptom of a problem that began elsewhere on the building facade. Because concealed leakage is a frequent basis for construction defect claims, our investigation and documentation methodology is designed to produce evidence that is defensible in litigation.
Efflorescence Investigation on Masonry
Efflorescence indicates moisture accumulation and movement through masonry walls. It occurs when water dissolves soluble salts and carries them to the surface. While not a structural defect, its presence indicates water entering the wall but not freely draining. Removing surface deposits without addressing the water source results in recurring problems.
Masonry & Split-Face Block Leak Investigation
Most masonry systems are designed to manage moisture, not stop it entirely. When water is not properly blocked behind the brick and redirected outward, it can pass through and enter interior spaces. Highly absorbent materials such as split-face block make matters worse. Our masonry permeability testing uses calibrated spray racks per ASTM E1105 to quantify the rate and location of water penetration, providing objective, defensible data for remediation planning or litigation.
Flashing Deficiency Investigation
Flashings, whether sheet metal or rubberized membrane, are critical components of water management systems. When missing, improperly installed, or discontinuous, water can enter the wall assembly even when the exterior surfaces appear intact. Common failure locations include window heads, sills, wall bases, and roof-to-wall transitions.
Coping & Parapet Leak Investigation
Copings protect parapet walls by shedding water from the top of the building. When coping systems lack properly installed through-wall flashing, end dams, or properly sealed joints, they become a direct pathway for water intrusion. In windy conditions, rain can be forced under metal coping edges, bypassing exterior surfaces entirely.
Leaks in Complex & Multi-Material Facades
Complex facade systems combine multiple materials, geometries, and interfaces. Leaks commonly originate at intersections between curtain walls, masonry, metal panels, balconies, copings, and structural elements. Water may travel long distances within layered assemblies, making forensic disassembly essential for accurate diagnosis.
ASTM & AAMA Testing Standards We Apply
Our water intrusion investigations are grounded in nationally recognized testing standards, ensuring findings are objective, repeatable, and defensible.
| Standard | Application |
|---|---|
| ASTM E1105 | Field determination of water penetration of exterior windows, skylights, doors, and curtain walls |
| AAMA 501.2 | Quality assurance and diagnostic water leakage field check of installed storefronts, curtain walls, and sloped glazing |
| ASTM E331 | Water penetration of exterior windows, skylights, doors, and curtain walls by uniform static air pressure |
| ASTM E514 | Water penetration and leakage through masonry |
| ASTM C1601 | Field determination of water penetration of masonry wall surfaces |
| ASTM E783 | Field measurement of air leakage through installed exterior windows and doors |
| ASTM E576 | Standard Test Method for Frost/Dew Point of Sealed Insulating Glass Units in the Vertical Position |
When to Hire a Facade Leak Investigation Expert
Not every leak requires a forensic investigation. But when the following conditions exist, an independent expert can save significant time, money, and legal exposure:
- Leaks have persisted despite multiple repair attempts by contractors
- Water intrusion is causing visible damage to interior finishes, flooring, or structural components
- Mold has been discovered or is suspected within wall cavities
- A construction defect claim is being considered or is already in litigation
- A building is under warranty, and the contractor disputes responsibility
- Insurance claims require independent, documented evidence of the source
- A property transaction requires due diligence on the building envelope condition
- The newly constructed building is experiencing leaks during the warranty period
For Attorneys: Construction Defect Litigation Support
Facade Consultants provides expert witness testimony, forensic investigation reports, and litigation support for construction defect cases involving water intrusion. Our findings are documented in accordance with ASTM standards and have been presented in depositions, arbitrations, and trials. Mark Meshulam, REWC, has served as an expert witness in numerous cases involving facade failures, glass safety, and building envelope defects. Contact us for a confidential case evaluation.
What You Can Expect: Our Outcomes- Clear, Documented Diagnosis: A detailed forensic report identifying the root cause of water intrusion with photographic evidence, testing data, and applicable code/standard references.
- Actionable Remediation Plan: Specific, prioritized repair recommendations based on evidence, not assumptions. We help you fix the problem once, correctly.
- Litigation-Ready Documentation: Reports and findings suitable for use in construction defect litigation, insurance claims, and dispute resolution proceedings.
- Cost Savings: By identifying the actual source of leaks, we eliminate wasteful trial-and-error repairs and prevent further damage to the building.
Facade Condensation Analysis
Condensation within building facades occurs when warm, moisture-laden air contacts surfaces below the dew point. Unlike bulk water leaks, condensation is driven by temperature differentials and humidity levels. Issues arise from insufficient thermal breaks, air leakage paths, and improper vapor control. Accurate diagnosis requires thermal imaging, psychrometric analysis, and an understanding of how heat, air, and moisture interact within the facade system.
We are Coming To Help You!
Building leaks can be frustrating, disruptive, expensive, and difficult to resolve, especially when previous repairs have failed. In many cases, the problem is not a lack of effort but a lack of clear understanding of the root cause. Façade Consultants works in the field to investigate, test, and document the causes of water intrusion. Our role is to identify what is happening, explain why it is occurring, and help develop practical next steps based on evidence, not assumptions.
