You want to detect rain penetration on your facade quickly and smartly. If you see wet walls or mold, we find the source and stop the penetrating damp. This saves you costs.
We inspect the facade, cavity wall, window frames, and jointing. We test weep holes, lead flashing and drip sill, gutter, and downpipe. Using spray testing, thermography, endoscopy, and moisture measurement, we detect water infiltration caused by driving rain and capillary action.
With Ultrices leak detection, you receive a plan for the repair of joints and sealant seams, and impregnation if necessary. Read reviews about detecting rainwater penetration on facades with 5 out of 5.
Table of contents
Detect rain penetration on the facade for permanently dry walls
Detecting rain penetration through the facade revolves around locating water infiltration caused by driving rain and wind-driven precipitation entering through your exterior wall. The goal of this page is to quickly give you a grasp of what rain penetration is, exactly how we detect it, and which solutions work without unnecessary demolition work. At Ultrices Leak Detection, we combine practical experience with scientific methods so that you receive clear advice and a comprehensive expert report that allows you to immediately plan repairs and insurance claims.
What rain penetration into the facade is and why you want to act quickly
With rain penetration, water penetrates the outer shell and enters through joints, window frame connections, seams, or porous materials. This leads to damp patches, mold growth, peeling paint, insulation damage, and even frost damage. We often see this in cavity walls with contamination, aging pointing, missing lead flashing, and leaking sills. By detecting rain penetration on the facade, you prevent consequential damage to plasterboard, parquet, and installations, and keep energy costs low.
Main causes of facade penetration and water infiltration
- Weakened jointing: Open or sagging joints act as a capillary water bridge and accelerate penetration
- Porous brick or concreteWeathering and salt separation increase water absorption and slow down drying
- Faults regarding window frames: Outdated sealant joints, missing compression tape, or insufficient waterproofing at sills and lintels
- Cavity problems: Cavity contamination, thermal bridges, missing open weep holes and incorrectly placed cavity anchors
- Minor errors: Cracks at expansion joints, leaking lead flashing, failing EPDM connections, and poor connections to dormers and chimneys
We verify this using measurement protocols in accordance with NEN 2778 for moisture diagnosis and, where relevant, NEN EN 1027 for the watertightness of windows and doors, supplemented by pragmatic field tests from AAMA 501.2. Our measurement strategy aligns with insights from TNO, TU Delft, and KIWA, and our VCA VOL and NEN 3140 certifications ensure safe working practices.
How we detect rain penetration on a facade without demolition
- Thermography and infraredWith a FLIR infrared camera, we visualize cold and wet zones that indicate active infiltration.
- Moisture measurements: Depth and surface measurements with Protimeter and Tramex show moisture gradients and accelerate origin determination
- Endoscopy in the cavityAn endoscope shows whether the cavity is contaminated, insulation is wet, or anchors form a leak path.
- Targeted water test: Controlled spraying traces the exact leak route without unnecessary risk
- Dye or smoke: Fluorescent dye and smoke test make micro-leaks and air leaks visible in connection details
If you would like a baseline measurement or a quick check on heat and moisture patterns beforehand, schedule a infrared facade scan log in and get an instant visual overview.
Step-by-step plan for detecting rain penetration on a facade
- Intake and analysisYou share complaints, photos, and the timing of the damage, after which we map out the facade type and construction details.
- Pre-inspection outside and insideWe assess jointing, expansion joints, window frames, and interior finishes, and create a moisture map.
- Draw up a measurement planWe select instruments and protocols based on wind direction, sensitivity to driving rain, and material composition.
- Testing and simulationWe combine thermography, endoscopy, and a targeted water test for unambiguous evidence of the leak route.
- Report and repair adviceWithin three days, you will receive an expert report with photos, measurements, and a concrete repair plan.
Leak detection process request
Do you have a complex window frame detail or do you want to test the water barrier on site, schedule a controlled water test on your facade with measurement report and photolog.
Measuring instruments and protocols for reliable results
- FLIR thermography: Detects thermal anomalies indicating wet zones behind plaster or masonry
- Protimeter and Tramex: Quantifying moisture percentages in plaster, wood, and stone for objective trending
- Endoscope and boroscope: Provides direct visibility into the cavity for contamination, wet insulation, and leaking anchor positions
- BlowerDoor support: Underpressure or overpressure intensifies air and water leaks for faster localization
- Normative assessment: Work in accordance with NEN 2778 and refer to NEN EN 1027 and AAMA 501.2 where applicable
Recognizable signs and what rain damage does to your home
- Dark spots and mold: Moisture rings around window frames and corners with a musty odor and damage to the interior finish
- Powdering paint and salt efflorescence: Crystal formation and plaster damage caused by salts from masonry
- Cold zones in winter: Local cooling due to wet insulation and heat loss visible in thermography
- Recurring leakage in wind and rain: Complaints increase during wind from the dominant direction and heavy rain events
If you are looking for a deeper understanding of the causes and approach, read about our approach at damp penetration and penetrating damp and tackle the core issue.
Why Ultrices leak detection is your partner
You get a nationwide team with over fifteen years of experience, available twenty-four hours a day, seven days a week, that works with insurers and delivers without any disruptive work. We offer no-fix, no-payment solution with a ninety-nine percent success rate, guaranteed coverage in the report, and on-site within an hour in case of emergency. Our professional detection equipment and a comprehensive expert report within three days give you certainty and a solid foundation for repairs. Call or WhatsApp 085 2505 217 or email info@Ultriceslekdetectie.nl for immediate advice. If you want to take immediate action, request a Free quote for facade leak detection within 24 hours sign up and schedule your examination with our specialists.
For detailed research on complex facades and dormers, you can also use our full process for leak detection on facades review, including thermography, endoscopy, and water test with normative substantiation.
Frequently asked questions
How do you recognize rain penetration in the facade, and is it different from rising damp?
Rain penetration is recognizable by damp patches that appear primarily after a shower, often on west-facing facades, around window frames, joints, and sills. You may sometimes see mold, peeling paint, and white salts. The pattern is rain-related and may partially disappear after dry weather. Rising damp, on the other hand, starts low down at the plinth and generally remains present, even without precipitation.
Note when the spot appears and take photos immediately after heavy rain. Also check for loose mortar, cracks, and open weep holes. We combine structural inspection with measurements according to NEN 2778 so that you don't have to guess but know exactly what is going on. Ultrices Leak Detection delivers a clear expert report within three days, enabling you to carry out targeted repairs.
How do you detect rainwater penetration in my facade or cavity wall without demolition work?
We start with a forensic facade scan and cavity analysis. This includes camera inspection inside the cavity, endoscopy of existing openings, accurate moisture measurements, and thermography to visualize thermal bridges, wet insulation, and leaking details. We trace leak paths using dye tests under UV light and a smoke test. Finally, we perform a controlled spray test that simulates wind and rain at critical connections such as window frames, water barriers, lead flashing, and expansion joints.
Our process is non-destructive, requires no hacking or breaking, and has a proven 99 percent success rate. We are VCA VOL and NEN 3140 certified, operate nationwide, arrive within an hour in urgent cases, and operate on a no cure no pay basis. If you would like to read how a spray test works and when it is useful, please take a look. our explanation of the spray test for facade leakage.
How much does it cost to detect rainwater penetration on a facade, and are the costs reimbursed by your insurance?
The costs depend on the building type, accessibility, the number of facade surfaces, and the required investigation methods. You will receive a free quote and tailored advice within twenty-four hours. After the investigation, you will receive a comprehensive expert report within three days, including photos, measurement data, and repair recommendations. This is one hundred percent risk-free thanks to our no cure no pay promise.
Insurers often cover facade leaks and moisture damage under buildings insurance, especially in the case of storm damage or sudden leaks. The policy varies by company, which is why we align the report with insurance standards, guaranteeing coverage. If you want to know exactly what your insurer requires, take a look at our report. Example of a report for insurance regarding facade leakage.
My facade only leaks during strong winds and driving rain. What can I do immediately?
This indicates rainwater penetration along joints, window frame connections, cracks, or a defective water barrier. Ventilate the room, temporarily shield the exterior at the suspicious detail, and take photos immediately after the rain. Ensure no moisture sources inside play a role; this way, we keep the evidence clear. Note the wind direction and duration of the precipitation; this data greatly assists us in the analysis.
Call us for emergencies. We simulate wind and rain on location, find the cause without demolition work, and install an emergency seal if necessary. Ultrices Leak Detection is available twenty-four hours a day, operates nationwide, and is on-site within an hour. If you want to see how we handle this without hacking, read on. our approach to facade leaks without hacking.