Sworn damp expert in Luxembourg
Black stains, condensation, salt-petre or a persistent musty smell? A sworn expert mandated by HUMINUS visits, measures and identifies the real cause and the type of damp. You leave with an independent report, usable by your insurer, building manager or a court.
Sales-led survey vs sworn expertise
Not all visits are equal. Here is what changes when the diagnosis is independent.
The diagnosis is tied to the sale
- Performed by a vendor sales rep
- Solution proposed = in-house catalogue
- No systematic standardised measurement
- Report not opposable to third parties
- Risk of over-treatment (injection, tanking)
The diagnosis is independent
- Performed by an independent sworn expert mandated by HUMINUS
- Cause identified objectively, independent from any work to be carried out
- Hygrometric measurements + IR thermography
- Report admissible to insurance / manager / court
- Priority-ranked, costed recommendations
Identifying the right type avoids useless work
Each damp pathology has its signature. Confusing them leads to repairs that do not last. The sworn expert we mandate tells them apart methodically.
Rising damp
Capillary rise from foundations. Salt-petre, blistered paint at 1–1.5 m above floor.
Condensation
Water vapour settling on cold surfaces. Misted windows, mould in corners.
Lateral infiltration
Water passing through a façade or roof. Localised stains, damp plaster.
Driving rain
South-west exposed façade, damaged joints, porous brick. Diffuse stains.
Hygroscopic damp
Mineral salts that capture air moisture. Returns after repainting.
Thermal bridge
Insulation discontinuity. Localised condensation, stains on slabs or lintels.
Ventilation / MVHR fault
Blocked vents, insufficient flow. Saturated air, generalised musty smell.
Accidental damp
Water damage, network leak, claim. Sudden onset, expertise for insurance.
The HUMINUS method step by step
A reproducible approach, documented at each stage.
- 01
First contact
We qualify your situation by phone: symptoms, age, building configuration.
- 02
On-site visit
The sworn expert we mandate visits, measures and notes visible and hidden indicators.
- 03
Technical measurements
Surface and air hygrometry, infrared thermography, calcium carbide method (CM), non-destructive probing.
- 04
Expertise report
Origin identified, damp type qualified, photos, plans, costed recommendations.
- 05
Legally admissible
Document usable for insurance, building manager, landlord, court or counter-expertise.
The HUMINUS expertise report
A complete, signed and dated document that remains your property and can be shared with anyone you choose.
- Identification of the real origin (not a symptom)
- Qualification of damp type among the 8 known cases
- Annotated thermal and hygrometric mapping
- High-resolution photos and location diagrams
- Priority-ranked recommendations (urgent / mid-term / preventive)
- Independent budget estimate per solution
- Signed PDF report, admissible to third parties (insurance, manager, justice)
Frequently asked questions
Request a sworn diagnosis
Describe your situation: we call you back within 24 working hours with a clear quote and an intervention date.
We operate in every commune of Luxembourg
Sworn damp expertise nearby, discover the page dedicated to your commune.
Luxembourg-Ville
137,678 res.
Esch-sur-Alzette
38,275 res.
Differdange
31,421 res.
Dudelange
22,379 res.
Pétange
21,290 res.
Sanem
19,611 res.
Hesperange
17,264 res.
Bettembourg
11,651 res.
Schifflange
11,674 res.
Käerjeng
11,343 res.
Strassen
10,831 res.
Bertrange
9,489 res.
Mamer
11,583 res.
Mersch
10,888 res.
Ettelbruck
10,212 res.
Walferdange
9,256 res.
Diekirch
7,204 res.
Erpeldange-sur-Sûre
2,810 res.
Schieren
1,968 res.
Colmar-Berg
2,520 res.
Wiltz
8,253 res.
Clervaux
6,062 res.
Vianden
2,117 res.
Grevenmacher
5,497 res.
Mertert
4,658 res.
Remich
4,035 res.
Echternach
6,291 res.
Junglinster
8,217 res.
Niederanven
6,116 res.
Steinsel
5,418 res.
Steinfort
5,598 res.
Population: STATEC / data.public.lu — Population by canton and municipality, as of 1 January 2026.
National coverage — all 100 Luxembourg municipalities
HUMINUS operates across every municipality. Every name is clickable: 31 open a dedicated local page, the remaining 69 open their canton page with a pre-filled request.