Cavity wall leak detection without demolition helps you get rid of moisture quickly. We at Ultrices Leak Detection locate the leak in your cavity wall without breaking anything, with an eye for damage and costs.
We inspect cavity walls, facades, jointing, insulation, lead flashing, gutters, and rainwater drainage using thermography, smoke test, tracer gas, acoustics, endoscopy, and moisture measurement. We provide a clear leak detection report with repair recommendations.
If you want to see proof, read our Google reviews 5 out of 5 and view the reviews of cavity wall leak detection without chiseling.
Table of contents
What is cavity wall leak detection without chiseling?
Cavity wall leak detection without hacking involves the targeted detection of moisture and water leakage in the cavity of your facade without demolition. We combine building physics with smart measurement technology to find the exact source of rain penetration, facade penetration, leaking connections around window frames, saturated insulation material, or cracking in masonry. At Ultrices Leak Detection, you work with a team with 15 years of experience, a 99 percent success rate, and a completely risk-free no-cure-no-pay promise. We deliver a clear expert report within 3 days and liaise quickly with your insurer so that your total claims burden decreases and repairs can be carried out in a targeted manner without unnecessary costs.
How does non-destructive cavity wall leak detection work
We make invisible moisture flows visible using thermography, endoscopy, smoke tests, and tracer gas. With a FLIR thermographic facade scan, we map thermal patterns and thermal bridges according to the principles of NEN EN 13187. With endoscopy, we inspect the cavity directly and assess cavity anchors, open weep holes, and the condition of the insulation. Smoke and dye tests reveal the route of infiltrating water around chimneys and facade penetrations. Tracer gas with a safe mixture of hydrogen and nitrogen reveals micro-leaks that are never visible to the naked eye. All these methods are non-destructive and align seamlessly with building physics concepts such as capillary action, vapor diffusion, and dew point.
Our proven approach step by step
- Intake and analysisYou describe the symptoms, such as damp patches or a moldy smell, and we link this to the cavity wall typology and year of construction.
- Visual inspection: we check pointing, lead flashing, expansion joints, and connections around window frames and dormers.
- Applying measurement technology: thermography, moisture measurement with Trotec and Testo, endoscopy of the cavity, and targeted smoke or water tests.
- Determination of cause: we record the origin, including the water's route, involved details, and a building physics explanation.
- Reporting and adviceYou will receive an expert report with photos, IR images, measurements, and a repair plan with priorities.
Leak detection process request
Typical causes and symptoms of cavity wall leakage
- Rain penetration and facade penetration: wind-driven rain penetrates aged mortar or porous brick, after which moisture migrates indoors via the cavity.
- Errors in detailsMissing or damaged lead flashing, faulty lintels, open wall joints, and incorrect seals around window frames cause water ingress.
- Saturated insulation material: Wet mineral wool or EPS loses insulation value and transports moisture to the inner leaf, resulting in thermal bridging.
- Technical installations: leaking rainwater drains, cavity wall penetrations, and brackets create hidden leak paths in the cavity.
- Visible signals: brown circles, mold, peeling paint or plaster, and a musty odor on interior walls bordering the facade.
- Seasonal patternComplaints increase during strong winds and heavy rain and decrease during dry weather, which is consistent with a cavity wall leak.
- Cold zones: Thermal anomalies on IR images show thermal bridges and moisture saturation behind the finish.
- Local saltsSalt efflorescence on masonry or plaster indicates penetrating and evaporating moisture in the cavity.
Technology and standards that we deploy
We work with professional detection equipment from brands such as FLIR for infrared, Trotec and Testo for moisture and climate measurements, and Leica Geosystems for accurate surveying. For tracer gas, we use a high-sensitivity hydrogen sensor and an inert carrier gas to guarantee absolute safety. Our methodology follows international best practices in building physics and air leak detection, such as BS EN 13187 for thermography and principles from ASTM E1186 for leak detection techniques, supplemented by Dutch practice regarding water installations in accordance with NEN 1006 where relevant for penetrations and pipes in or along the cavity. In this way, we ensure reproducible measurements and clear evidence for insurers.
Practical examples and results
In a 1930s home in Amsterdam, we found a wet cavity insulation zone using thermography and endoscopy due to missing lead flashing at an extension. Repair of the detail and forced drying completely resolved the damp spots on the inside. In a terraced house in Eindhoven, we located a micro-leak around a cavity penetration using tracer gas, through which rainwater was being sucked into the cavity during windy conditions. After targeted sealing, the issues disappeared. In an apartment building in Rotterdam, a controlled water test showed that rain penetration through open weep holes coincided exactly with cold patterns on the IR image. Replacement of the jointing and the installation of new drip edges prevented recurrence. If you would like to delve deeper into imaging techniques and case studies, please read our explanation of thermography for facade problems via Thermographic facade leakage analysis or see how we work without demolition via Method without demolitionIf you want to specifically delve deeper into the cause and repair prospects regarding the cavity, go to Everything about cavity wall leakage.
Costs, lead time and insurance
We provide nationwide service with an emergency option and are often on-site within 1 hour. Thanks to 24/7 availability and VCA VOL and NEN 3140 certification, we are available for residential and commercial properties. You will receive a 5 out of 5 star rating on Google Reviews for our expertise and reporting. We work with insurers and offer a guarantee of coverage when the policy covers leaks. No solution means no payment with our no cure no pay promise. To provide a clear picture of the budget and schedule, we will send a no-obligation price indication within 24 hours, and after the inspection, a complete expert report with photo attachments and repair advice within 3 days. For urgent questions or scheduling, call or WhatsApp 085 2505 217 or email info@Ultriceslekdetectie.nl and request your free quote immediately via A quote for cavity wall leak detection within 24 hours.
Frequently asked questions
What is cavity wall leak detection without chiseling and how does it work?
At Ultrices Leak Detection, we locate leaks in cavity walls without any demolition or breaking. We start with a structural analysis of the facade envelope and cavity construction, including damp-proof courses, lead flashing, weep holes, and cavity anchors. Next, we combine moisture measurement and thermography using an infrared camera with endoscopy through existing openings and, where necessary, a spray test or smoke test. Using tracers and dye, we track capillary moisture and penetrating water directly to the source.
The result is fast and clean with a 99 percent success rate and no unnecessary damage. We are available nationwide 24 hours a day and in emergencies are often on-site within 1 hour. You will receive a full expert report suitable for insurers within 3 days. If you would like more technical in-depth information on endoscopy, please view our cavity wall camera inspection.
How do you know if the cavity wall is suffering from rainwater condensation or a damaged damp-proof course?
Signs of rain penetration or a leaking facade include damp patches that move with the wind direction and showers, salt efflorescence on the masonry, and a musty odor in interior spaces. With a defective damp-proof course or lead flashing, you often see wet zones above window frames or continuous horizontal strips, sometimes exacerbated by clogged weep holes or blocked cavity drainage.
Condensation in the cavity is recognizable by thermal bridges and mold formation that occurs specifically during cold periods without a direct link to precipitation. Our measurements using a hygrometer and thermography distinguish dew point problems from actual leaks. We also check cavity wall insulation, such as mineral wool, EPS beads, or PUR foam, for saturation or sagging.
How much does cavity wall leak detection cost without demolition work, and is it covered by insurance?
The investment depends on the building type, accessibility, working at height, and the number of required test protocols, such as thermography spray testing and endoscopy. You will receive a free fixed-price quote within 24 hours so you know exactly what to expect beforehand. No solution means no payment thanks to our no-cure, no-pay policy.
In many cases, home insurance covers leak detection and consequential damage, provided the cause is not considered overdue maintenance. We provide a clear expert report with photos, thermograms, and measurements within 3 days and, if desired, coordinate directly with the claims department. Read more about coverage at cavity wall leakage covered by insurance.
How quickly will you be on site and what will you receive after the investigation?
For emergencies, we are available 24 hours a day and, in most cases, are on-site nationwide within 1 hour. Our specialists are VCA VOL and NEN 3140 certified and use professional equipment suitable for non-destructive facade inspections. With 15 years of experience and 5 out of 5 stars on Google, you can count on craftsmanship.
Afterwards, you will receive a complete and understandable report with a cause analysis, photo log, and concrete repair advice, including priorities and risk assessment. We guarantee our diagnosis and assist you with the insurer. If you are in an immediate hurry, schedule via our emergency service for cavity walls.