Permanent solutions to ALL
your moisture problems
Put a lasting end to the moisture that damages your buildings.
The MURSAIN process: a passive and autonomous treatment for rising damp requiring no electricity and no maintenance.
- Family business
- Specialist in building moisture issues
- Cause analysis before any solution
- Methods proven for more than 40 years
Solutions for every moisture problem
Which solution for which cause?
The solution that sets us apart
Rising damp - treat the cause
The MURSAIN process
The MURSAIN process acts at the source of the problem, not on the symptoms. Unlike devices that treat the air, it neutralises the very mechanism that makes water rise inside the wall.
- Passive - no electricity, silent
- Autonomous - no maintenance, no wearing parts
- For life - the house is equipped for the rest of its life
Applied physics · 40+ years
Satisfied or refunded — at least 25% reduction within 3 years. No reimbursement has been requested since MURSAIN was founded.*
* Company statement; see the contractual guarantee terms.
Discover the processHumid air - condensation
Air treatment
Control humidity contained in the air: homes, buried basements, industry, museums and collectors, agriculture.
See air treatmentIncident - structural drying
Drying after water damage
Dry saturated structures before decorative renovation work. Dehumidifiers are perfectly suited to this situation.
Learn moreDepending on the diagnosis, several solutions can be combined for a lasting result.
The cost of waiting
15 000 €
Redoing the finishes does not stop the moisture
Five rooms redone at an illustrative €3,000 each already represent €15,000. If the cause remains, plaster, paint and wallpaper can deteriorate again.
Treat the cause
Understand what you are paying for
See what determines the MURSAIN price, what the intervention includes and how it compares with repeated remedial work.
See pricing and comparisonIllustrative scenario only: actual work costs and recurrence vary by property, damage and chosen finishes.
MURSAIN result guarantee
Our commitment
Satisfied or refunded
MURSAIN commits to a minimum 25% reduction in moisture within the first three years.
−25 %
Minimum measured reduction
3 years
To achieve the committed result
Refunded
Equipment refunded if the result is not reached
If the committed result is not reached, MURSAIN refunds and recovers the equipment. To date, no customer has ever requested a refund.
Why choose MURSAIN?
We are a family business working to protect buildings against moisture with solutions proven for more than 40 years. One of our missions is to help preserve heritage buildings.
We do not simply hide the visible effects of moisture: we rigorously analyse the causes of your building moisture issues.
Each building has its own issues, its own causes and its own solutions. Instead of simply hiding the visible effects, we guide you toward the most suitable solution or combination of solutions for your building.
What our clients say
As an architect, I have on many occasions called on the services of Mr Jack LECARPENTIER, creator of Hygrotop, as project manager and court expert.
Xavier HUVELIN
Architect
I was convinced by the geomagnetic process. Follow-up checks confirmed the positive result.
Audrey ARDAENS
When I moved into my house, the walls on the north side were very damp, even on the first floor. The furniture leaning against them was all soaked and soft. The device was installed in November 2025. By January 2026 no more moisture was seen on the walls, and the dampness and mould on the furniture had completely disappeared. Moreover, and unexpectedly, despite a few tiles cracked by the hail of June 2025, the rain no longer stained the ceilings upstairs. The device therefore promotes the evaporation of water.
Armand de Vaucorbeil
MURSAIN equipment installed in 2023: we noticed a significant reduction in humidity.
Ghislain de Castelbajac
Owner of the Château de Caumont
