French Chateau Located In the South of France

Tech-Dry recently restored a 15th-century French château using its advanced protective products. The tower façade had begun to crumble, prompting urgent intervention. Originally built in 1654, Château d’Osserain began with the laying of basement stones. Builders used local river stone and mortar to construct its thick, fortified walls.

The Château sits in southwest France, overlooking the Saison River—the boundary between Béarn and Basque country. Its 25-metre tower has long guarded the ancient bridge linking the two provinces.

Over time, various chatelains and chatelaines upgraded and altered the structure. The original flat roofs were replaced with pitched roofs in the early 20th century.

Today, the château stands in its best condition since the early 1900s. It features updated plumbing and electrical systems, five bathrooms, seven bedrooms, and central heating powered by 43 radiators. The estate spans 1.6 hectares and includes a circular drive.

To complement these upgrades, the team addressed the deteriorating façade by conducting site-specific tests to confirm product compatibility.

Based on the results, we selected two specialised Tech-Dry products. First, Tech-Dry Densacrete 90 was applied to the surface for strengthening purposes then a secondary application of Tech-Dry’s Protectacrete S waterproof treatment to further protect the surface from external conditions.

This targeted intervention preserved the château’s historic integrity and significantly enhanced its structural resilience—demonstrating how modern building science can respectfully support heritage conservation.