Advise
Listen to the situation, understand the observed issues and gather the useful information.

MURSAIN
A family business putting its expertise at the service of one conviction: keeping French heritage alive by treating moisture at its source, never on the surface.
In brief
MURSAIN is a family business specialising in building moisture issues since 2020. Founded by Louis, Ythier and Delphine de la Guéronnière and trained directly by Jack LECARPENTIER, inventor of the HYGRO device.
One family, one conviction
MURSAIN is first and foremost a family story. Louis, Ythier and Delphine de la Guéronnière share the same conviction: a building that remains sound and dry lasts through the centuries.
Since 2020, they have devoted their expertise to building moisture issues. Their role is not to sell one single solution for every wall, but to identify the issues and their probable causes before taking action.
Each building has its own problems and its own solutions. That is why MURSAIN begins with advice, then analyses the causes of moisture before proposing a response truly suited to your moisture problems.

Direct transmission
The La Guéronnière family trained directly with Jack LECARPENTIER, court expert and creator of the HYGRO device. He introduced in France the methods we use today to stop moisture in buildings: methods proven for more than 40 years. Today, we are their heirs and guardians.
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.
We do not hide the visible effects of moisture. We go back to their origin in order to propose the most appropriate response, consistent with the building, its materials and its context.
Listen to the situation, understand the observed issues and gather the useful information.
Link visible traces to possible causes without reducing the building to an isolated symptom.
Propose the next step consistent with the building, its materials and its context.
Our commitment
We are proud to offer solutions that allow houses and buildings to last as long as possible. Preserving a wall means preserving a history: that of a home, a family, a territory.
This is what drives us every day: giving old and recent buildings alike the conditions for a long, healthy and dry life.
Next step
Request a diagnosis. Describe the issues you have noticed and the construction period.