Ultrices leak detection helps you quickly and reliably detect leaks in exterior walls by certified specialists. This way, you prevent additional damage and costs.
We inspect the facade, masonry, joints, window frames, sealant joints, lead flashing, gutters and downpipes, cavity walls, and expansion joints. Causes are often rain penetration, penetrating damp, and cracks around the window frame at a storm spot.
To detect leaks in exterior walls, we use thermography, a smoke test, dye, endoscopy, and accurate moisture measurement. Read our reviews on Detecting a leak in an exterior wall, Google reviews 5/5.
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Detecting a leak in an exterior wall explained
Detecting leaks in exterior walls revolves around precisely locating water infiltration in facades and cavity walls without unnecessary demolition work. We combine building physics such as capillary action, hydrostatic pressure, and hygrothermal behavior with measurement data to determine where rainwater or tap water penetrates the masonry. Consider brick, calcium silicate, plaster layers, jointing, cavity anchors, and window frame connections. We align our approach with NEN 2778 classifications for moisture in buildings and use protocols that are in line with European test standards for the watertightness of facade elements. With professional detection equipment and validated methods, we provide certainty that guides repair work and limits damage. Ultrices Leak Detection helps you quickly and accurately, for both residential and commercial clients, is available nationwide, and can be on-site within an hour in emergency situations.
Causes and signs of exterior wall leakage
- Rain penetration and facade penetrationWind-driven rain penetrates through porous brick and aged mortar, especially during driving rain and on west-facing facades, according to insights from the KNMI.
- Errors in detailingLead flashing, expansion joints, base joints, and lintels that are not installed correctly or become aged form moisture bridges and leak paths.
- Cavity contaminationCement protrusions, rubble, or insulation bridging the air gap draw moisture to the inner wall and cause cold and damp spots.
- Window frame and sealant connectionsCuring sealants and open seams at window and door profiles lead to water ingress around the frame.
- Recognizable symptoms: Dark damp patches, mold, peeling paint, salt efflorescence, and musty odor, often worsened after rain.
Our proven leak detection method without breaking
- Intake and contextWe collect year of construction, material composition, and recent work, and link this to local precipitation and wind data from the KNMI for targeted hypotheses.
- Visual inspectionWe inspect masonry, jointing, window frames, and lead flashing, and create a moisture map using Tramex and Protimeter measurements.
- ThermographyWith a FLIR infrared camera, we visualize thermal bridges, wet passages, and leakage traces in the outer wall and cavity.
- Targeted testWe perform a controlled water test and dye test and, where necessary, apply tracer gas and endoscopy for conclusive evidence.
- Report and adviceYou will receive a comprehensive expert report within three days with photographs, measurements, a cause analysis, and a repair plan including priorities.
Leak detection process request
Techniques and equipment for accurate detection
- Infrared facade scanWith thermography, we detect temperature differences that indicate moisture transport and avoid wasting time on unnecessary openings. For more in-depth information, check out our thermographic facade inspection.
- Waterproof with segmentationWe dose and segment water on specific surfaces and joints, in accordance with standard European principles for watertightness testing, to irrefutably trace the leakage path.
- Tracer gas detectionForming gas with a highly sensitive sensor reveals micro-leaks at bushings and connections where water sporadically penetrates.
- Endoscopy in the cavity: With an endoscope camera, we inspect cavity contamination, cavity anchors, open weep holes, and lead flashing without damaging the wall. Read more about cavity wall moisture problems.
- Acoustics and moisture metersUltrasonic and acoustic measurements combined with dielectric and calcium carbide-free methods provide an accurate picture of the moisture situation. For a targeted approach to the entire building envelope, see also targeted facade leakage detection.
From measurement result to repair advice and insurance
We provide well-founded advice that is feasible for contractors, facade specialists, or window frame manufacturers. Consider a phased approach to joint repair, hydrophobization treatment where appropriate, repair of lead and base joints, and corrections to open weep holes for ventilation. Our expert report is widely accepted by insurers thanks to clear cause-and-effect substantiation supported by photologs and measurements. We are VCA VOL and NEN 3140 certified, operate nationwide, offer 24-hour service, and an emergency service. You benefit from a no-cure-no-pay policy with no solution, a 99 percent success rate, a guarantee of coverage, professional equipment, and over fifteen years of experience. Our Google reviews are five out of five stars, and you will receive a free quote within twenty-four hours.
Practical examples in the Netherlands
In Amsterdam, we located rain penetration through weathered brick and open mortar joints in a canal house, visualized using thermography and confirmed with a segment water test. In Rotterdam, we demonstrated cavity bridges caused by construction debris in a new-build facade, identified using endoscopy and moisture mapping. In Utrecht, leakage around a wooden window frame was found to originate from aging sealant and incorrect lead flashing overlap, after which targeted remedial steps were carried out. In The Hague, we correlated KNMI wind rose and shower intensity with wet spots to substantiate peak load on the seaward side for insurance purposes.
Immediate help from Ultrices leak detection
Detecting a leak in an exterior wall requires speed and precision, which is why we are on-site within an hour with leak detection without breaking, including emergency service and 24/7 availability. Call or WhatsApp 085 2505 217 or email info@Ultriceslekdetectie.nl for immediate advice and scheduling. If you want immediate clarity regarding costs and turnaround time, Request your free leak detection quote within 24 hours and receive an action plan with a timeline and measurement methods. We work with insurers and deliver a complete and clear report that accelerates repair and claims processing.
Frequently asked questions
How do you recognize a leak in the exterior wall and what are the most common causes?
You often notice it by damp patches, mold, peeling plaster, flaking paint, or salt efflorescence. A musty smell at the baseboard or cold spots on a thermal image are also clear signs. During rain, the interior wall may darken or the plasterwork may feel damp. If the problem keeps recurring, there is usually more going on than just condensation.
Common causes include penetrating damp due to porous masonry, cracks in the facade, aging pointing, leaking gutters or downpipes, open weep holes, a defective damp-proof course in the cavity, and leaking window frame connections. Saturated or sagging cavity wall insulation, on the other hand, can actually conduct water inwards. We map the cause and water flow in a targeted manner, without any demolition or breaking work.
How do you locate a leak in an exterior wall without hacking and breaking?
We combine thermography with moisture measurements, cavity endoscopy, and targeted spray tests that simulate wind and rain. Using a professional infrared camera, we track cold spots and moisture bridges. An endoscope allows us to look behind the masonry, and dye tests such as fluorescein show us exactly where the water is entering. Where necessary, we perform a smoke test to trace air leaks and open joints.
Our approach is non-destructive, fast, and precise. Thanks to fifteen years of practical experience, VCA VOL, and NEN 3140 certification, we work according to the principles of NEN 2778 for moisture in buildings. You will receive clear advice and concrete remedial steps. If you would like to learn more about our damage-free approach, please take a look. Facade leak detection without hacking (/lekdetectie-diensten/lekdetectie-gevel-zonder-hakken/).
How much does it cost to detect a leak in an exterior wall, and is this covered by your insurance?
You will receive a free and transparent quote within one day based on your situation and photos. Upon agreement, we schedule immediately; for urgent cases, we can be on-site within an hour. You only pay for the inspection, with no surprises afterwards. No solution, no payment. Our success rate is 99 percent thanks to the use of high-end measuring equipment and a proven protocol.
After the inspection, you will receive a comprehensive expert report within three days, including measurements, images, and repair recommendations. We operate nationwide and are accustomed to liaising with insurers for both private individuals and businesses. Coverage depends on your policy; always check this with your insurer. Read how we expedite your case via report for insurance against facade leakage (/lekdetectie-diensten/rapport-voor-verzekering-gevellekkage/).
My facade only leaks when it rains; what should I do now, and how do you resolve this specifically?
Rain penetration caused by wind pressure forces water through porous bricks, poor joints, open weep holes, or past window frame seals. A fault in the damp-proof course or lead flashing can also conduct water to the inner wall. We simulate rain with a regulated spray test and track the water flow using thermography and dye. This allows us to determine whether it involves penetrating damp, leakage at details, or a combination.
Until the definitive repair, you can limit damage by moving furniture away from the walls and ensuring good ventilation. We take a source-oriented approach and provide a repair plan that truly eliminates the cause, without unnecessary demolition work. Learn more about this cause-oriented approach via detecting rain penetration in the facade (/lekdetectie-diensten/regeninslag-gevel-opsporen/). Ultrices Leak Detection is at your service day and night, available nationwide.