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Sound Absorber. Hemp In The Whiskey Cellar

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Sound Absorber. Hemp In The Whiskey Cellar
Sound Absorber. Hemp In The Whiskey Cellar

Video: Sound Absorber. Hemp In The Whiskey Cellar

Video: Sound Absorber. Hemp In The Whiskey Cellar
Video: So You Want to Create an RTD? 2023, November

Sound absorber: The acoustics in a vaulted cellar at the medieval Scharfenstein Castle in Thuringia, where whiskey tastings take place, should be improved. The decision fell on new sound absorbers made of hemp.

Author: Nina Voigt I Photos: Caparol / Udo Stieglitz, photography Sangerhausen

More than 800 year old walls, medieval flair and an impressive view of the Leinetal: The reconstructed Scharfenstein Castle in Thuringia has developed into a popular excursion destination in recent years. The historic castle, which is owned by the city of Leinefelde-Worbis, has been extensively renovated and converted since 2006 and now offers visitors a café with a large panoramic terrace, guided tours, regular events and, since autumn 2018, a "whiskey experience center": in the old walls of the Kernburg demonstrates the Number Nine Spirituosen Manufaktur GmbH in a show distillery the production of whiskey, offers tastings of various types and provides information about the many facets of the spirit.

Authentic lime paint

Since the castle is a listed building, special demands were made of the materials used during the renovation. The walls inside the core castle were to be given natural coatings - this requirement even applied to modern annexes, an almost 20 meter high tower that closes the former gap between the east and west wings. The Engelmann and Bergener painters, who were commissioned with the interior work, achieved an authentic coat of paint with a lime paint. The paint from a special product series for listed and historic buildings is highly water vapor permeable, absorbent and can be painted over several times.

Ecological sound absorbers

The other building materials should also meet the requirements of an interior design that blends harmoniously into the historic building. The Whiskeywelt Burg Scharfenstein includes a vaulted cellar with a restaurant and bar, which is also used for tasting evenings and private events. Sound-absorbing measures were necessary to make this space usable and to provide entertainment there. "Here our natural acoustic products made from renewable hemp offered themselves," says Caparol sales consultant Ralf Engelhaupt, who was consulted by painter Lutz Engelmann.

The new generation of ecological sound absorbers is made from the straw of the hemp plant. The commercial hemp is grown in Austria in regional agriculture without pesticides and synthetic fertilizers. The high degree of utilization of the hemp plant makes it a particularly efficient agricultural raw material. The hemp fibers obtained from the straw are pressed with the help of pressure and heat into a solid plate, similar to a fleece.

Visually appealing

"The effect is the same as with any other porous absorber," explains Caparol product manager Alexander Barchfeld: "The sound penetrates, is broken on the fibers and converted into heat." The panels can be glued flat on the wall or on the ceiling and recently also suspended from the ceiling as a ceiling sail. "The processing is pleasant," painter Lutz Engelmann reports, "the panels are dimensionally stable and can also be cut to size if necessary."

Burg Scharfenstein is one of the first objects in which the new hemp acoustic panels were used. "The main trigger was the optics," says Burg Tenant and Whiskey World operator Bernd Ehbrecht. The robust surface was deliberately chosen so that the naturalness of the product is also visually visible. "The fact that it is a natural product makes things even more charming."

More comments:

System comparison hemp vs. EPS

Market opportunity ecology


Construction board


Number Nine Spirituosen

Manufaktur GmbH

37339 Leinefelde-Worbis


Floor and acoustic design:

Lutz Engelmann drywall

37339 Berlingerode

Execution of painting work:

Specialist painter Tobias Bergener

37355 Niederorschel


Caparol products used:

Capacoustic Nature Panel

Capacoustic Nature ceiling sail

Histolith inner lime

DisboXID 420 2K EP primer Premium

DisboXID 421 2K-EP coating Premium

DisboPUR W 458 2K PU sealing