Multipor – specialized insulation for historic buildings

The Multipor system offers a wide range of thermal insulation solutions, including ETICS and roof insulation. However, in Poland, its most significant growth has been in the historic building renovation sector. “The ETICS market is highly competitive, which is why we have focused on an area requiring specialized knowledge and experience,” says Wojciech Łasut, Technical Sales Director of Xella Poland. “In Poland, Multipor has become synonymous with reliable thermal insulation in building restoration, as evidenced by over 17 years of presence in this niche and numerous projects — including those on UNESCO World Heritage-listed sites such as Malbork Castle,” he adds.

Multipor ExSal Therm – an innovation for damp wall renovation

For over a decade, Xella Poland has participated in EKIR, presenting its technologies to conservation professionals, architects, and representatives of design offices and construction companies. In the 22nd edition of the congress, held at the end of March 2025, the key topic was the application of the innovative Multipor ExSal Therm solution – an insulation system designed for the renovation of damp and salt-contaminated basement walls.
“The first projects using Multipor ExSal Therm are already delivering excellent results,” emphasizes Wojciech Łasut. “In one of the historic tenement houses in Ruda Śląska, we conducted detailed analyses of the wall condition before and after renovation. We shared the results and our experience with congress participants in Kraków".

The effectiveness and reputation of the Multipor system in building restoration are reflected in an impressive number of projects – over 2,300 buildings across Poland.

Hala Koszyki

The revitalization of Warsaw's historic Hala Koszyki, transformed the Art Nouveau structure into a modern culinary hub featuring nearly 20 restaurants and bars. Due to preservation requirements, internal insulation was necessary, and Multipor mineral boards were chosen for their excellent thermal properties and adaptability to complex wall shapes. The insulation was precisely applied to the intricately decorated brick walls and arched windows without altering the historic façades. This project stands out as one of the most notable examples of adaptive reuse in Warsaw’s recent architectural history.

Opole Railway Station

The historic Opole Railway Station, originally built between 1898 and 1900, underwent a major renovation to restore its grandeur and meet modern standards. To preserve the iconic façades while improving energy efficiency, Multipor mineral insulation boards were installed internally. This solution enhanced the thermal comfort of the large interior spaces without altering the station’s historic character. The renovation also included accessibility upgrades and the restoration of original decorative details, reviving the building as a proud symbol of railway heritage.

Malbork Castle

The iconic Teutonic Castle in Malbork, a renowned UNESCO World Heritage Site, has completed a major restoration of its historic farm buildings. Now housing the Teutonic Heritage Research Centre along with a library and several workshops, the project has successfully adapted the structures to modern thermal standards without compromising their original brick façades. Internal insulation was achieved using Multipor mineral boards, providing excellent thermal performance, moisture control, and fire resistance. This sensitive renovation not only preserved the castle's enduring character but also enhanced its cultural and educational offerings for visitors and researchers alike.

With years of experience and innovative solutions, Xella Poland continues to strengthen its position as a leader in historic building insulation, continuously developing the Multipor technology to better meet the needs of conservation professionals and investors.