At Ultrices Leak Detection, we help you trace leakage in masonry joints and brickwork around window frames, chimneys, and balconies. If you see damp spots, we find the source.
We use thermography, a smoke test, endoscopy, and a moisture meter. We also quickly trace the water route in bathroom cavities, roof edges, and lead flashings.
After the leak detection, you will receive a report with advice for re-grouting, sealing, or impregnation. If you want to be sure of grout leak detection by experts, read our Google reviews 5/5 via experiences with detecting grout leaks.
Table of contents
Detecting mortar leaks in masonry and facades
Detecting mortar leaks means specifically identifying where rainwater, condensation, or spray water penetrates the masonry through joints and cracks. Water can be drawn inwards by capillary action due to aging mortar, cement crumbling, detachment along the brickwork, open weep holes, or damaged sealant joints around window frames. This causes damp patches, mold, frost damage, and heat loss. We combine building physics according to NEN 2778 and principles from Eurocode 6 with practical measurement methods to accurately locate every facade leak through the joints.
Common signs of leakage in grout
- Dark moisture streaks: vertical or diagonal marks on the facade or interior wall that worsen after heavy rain
- White efflorescence: salt crystals and efflorescence indicating penetrating moisture and drying currents
- Loose mortar: crumbling joint mortar, hollow-sounding spots and micro-cracks
- Mold and musty smell: interior at thermal bridges, behind wallpaper or in window reveals
- Damage around window frames: damp patches and peeling paint caused by leaking connection joints and drip edges
Our measurement methods for detecting grout leakage
We work without demolition and combine non-destructive techniques for maximum certainty. Our experts use professional detection equipment such as FLIR thermography cameras, Trotec and Tramex moisture meters, endoscopy, and dyes. For window and facade details, we apply protocols that align with RILEM Karsten pipe tests and building watertightness standards. If you want to delve deeper into infrared analysis, please visit our page about thermography for facade leaksFor the controlled rain load we use during research, read more at our water test for facade leakageIf rain penetration and dampness are causing problems for your facade, this floor will help. causes and prevention of dampness in the facade.
- Thermography: thermal imaging detects cold draft zones, wet cavity walls and leaky connections
- Karsten tube test: local water absorption test to demonstrate powdered grout and suction
- Water test with sections: controlled mist and section-directed watering of ribbon and butt joints
- Dye tracing: fluorescein and UV light follow mutual leakage paths through joint and masonry
- Endoscopy in the cavity: visual inspection of cavity anchors, mortar protrusions, contamination, and lead flashing
Step-by-step plan for detecting leaks in grout
- Intake and analysis: map your complaints, building type, brick and joint type, with reference to NEN 2778
- Visual inspection: exterior and interior, attention to expansion joints, sealant joints, drip edges and connections
- Measurements and test area: thermography, Karsten test, moisture measurement and dye tracing per section
- Source localization: correlation of measurement data with wind and rain load and construction details according to SBR references
- Advice and report: clear cause, repair advice, and prevention such as waterproofing or reprofiling of joints
Leak detection process request
Types of jointing and risk points we inspect
- Flat and recessed: increased water accumulation on horizontal ribbon joints with micro-cracks
- Cut and cut joints: cracking in the sharp edge and detachment along the stone surface
- Lime and cement mortar: lime-rich mortar is moisture-regulating but susceptible to silting under salt load
- Open butt joints: necessary for cavity ventilation but critical against rain and wind pressure
- Connections at window frames: failing sealant joints, compression tape and lead flashing around sills and drip edges
What you can expect from our report and recovery advice
Within three days, you will receive a comprehensive expert report including photographs, infrared scans, measurements, and a clear cause-and-effect diagram. We include repair advice using KOMO-certified materials and protocols for sustainable jointing, such as correct scraping, cleaning, and re-pointing, re-profiling of water-repellent details, repairing expansion joints, and selective hydrophobing with vapor-permeable impregnating agents. Thanks to our collaboration with insurers and transparent documentation, you increase your chances of coverage. If you want immediate certainty regarding costs and planning, you can contact us directly. Receive a free quote for grouting leak detection within 24 hours.
Why Ultrices leak detection is your partner
- Proven success rate: 99 percent accurate source investigation, no solution, no payment via no cure no pay
- Fast and nationwide: Available 24/7, emergency service and on-site within one hour, wherever you live
- Without demolition: non-destructive techniques limit nuisance and repair costs
- Certified: VCA VOL and NEN 3140 and the use of top-of-the-line equipment from FLIR, Trotec, and Tramex
- Service and security: 15+ years of experience, five out of five Google reviews, guaranteed coverage, and one hundred percent risk-free
We assist both private individuals and business clients such as HOA managers, contractors, housing associations, and municipalities. You speak directly with a specialist who guides the entire process, from initial measurement to remedial advice.
Call or WhatsApp 085 2505 217 or email info@Ultriceslekdetectie.nl for immediate help with detecting leaks in jointing. If you also want to know how we tackle leaks in adjacent structures, read how we assess window frames and reveals at leakage around window frames or discover how we insulate and solve cavity problems via leak detection in the cavity wall.
Frequently asked questions
What are the symptoms of a leak through the mortar joints on your facade, and how can you recognize it quickly?
You can recognize mortar leakage by damp patches around window frames, mold growth, white salt efflorescence on masonry, and peeling plaster. Often, the interior wall feels cold and damp, and you see brown streaks under lintels or along expansion joints. This usually occurs mainly during rain and wind from a specific direction, typically with crumbling joints or open weep holes.
If you see these signs after a shower and they do not disappear, there is a high probability that penetrating damp is entering through the joints. We pinpoint the cause with pinpoint accuracy using visual evidence and measurement data so that you can carry out targeted repairs. If you want to delve deeper into rain penetration, read on via detect rain penetration on the facade.
How do you trace grout leaks step-by-step without hacking or breaking?
We start with a structural intake regarding location, year of construction, and bond, followed by a visual inspection of horizontal and vertical joints, expansion joints, and window frame connections. Next, we use professional moisture meters and thermography to visualize cold, wet patterns. We test the water absorption of the joint with the Karsten tube and, where necessary, perform a controlled spray test in accordance with NEN 2778. For window frames or cavity wall issues, we use endoscopy, a smoke test, or dye tracers.
Everything is done non-destructively, so without any hacking or breaking. With VCA VOL and NEN 3140 certified specialists, over fifteen years of experience, and a 99 percent success rate, Ultrices Leak Detection locates the source quickly and safely. In emergencies, we are often on-site within an hour, and you will receive an expert report within three days. If you want to see exactly how such a test works, take a look. our spray test for facade leakage.
How much does it cost to trace a leak in the jointing, and is it covered by buildings insurance?
The price depends on accessibility, facade height, required test combinations, and urgency. We work with transparent fixed rates per inspection, and you will receive a free quote within twenty-four hours. In urgent cases, we act immediately and still maintain clear pricing. No solution, no payment, thanks to our no-cure, no-pay policy.
We deliver a detailed expert report within three days that meets insurer requirements, and we assist you with the claims process. Coverage always depends on your policy conditions, but our reports are widely accepted. Nationwide service, a five-out-of-five-star customer rating, and a guarantee of report coverage during insurer processes. View indicative amounts via facade leak detection rates.
Do you also need to impregnate after repairing the jointing, or is the cause in the cavity wall?
If the outer shell is primarily the culprit due to crumbling joints, cracking, or open weep holes, targeted repair of the jointing and sealing of expansion joints will help. A hydrophobic treatment after repair can significantly limit water absorption and prevent new penetration, especially during driving rain on an exposed facade.
If our measurements reveal that the source lies deeper—for example, a broken damp-proof course, clogged cavity, or wet insulation—then cavity inspection and targeted repair are necessary instead of just impregnation. We substantiate this with thermography, moisture measurements, and endoscopy, and provide a clear plan with priorities so you know exactly what to do and in what order.