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Søuld Acoustic products made from eelgrass for healthy living.

To assess whether the collection of eelgrass has any negative impact on climate, biodiversity or the local environment, ...
19/10/2026

To assess whether the collection of eelgrass has any negative impact on climate, biodiversity or the local environment, DHI has conducted a biodiversity analysis of Søuld’s activities.

The analysis shows that collection along the examined coastal stretches does not negatively affect the seabed or the natural distribution of eelgrass. No harmful effects on the ecological integrity of the areas, including birdlife and other species, have been identified. By collecting eelgrass from the Danish coasts, biomass producing climate-damaging greenhouse gases such as CO₂ and methane is removed.

The collection of eelgrass is not a formal environmental mitigation measure. However, the effect is straightforward: when biomass is removed, the nutrients and carbon it contains are removed with it. This means that our work with eelgrass not only extends carbon storage in building materials — it also contributes to reducing nutrient pressure in the coastal areas where collection takes place.

This documentation is an important step in ensuring that our collection and use of eelgrass takes place with respect for climate, biodiversity and the coastal environments in which we operate.

Read the full report (Danish) here: https://usercontent.one/wp/www.sould.dk/wp-content/uploads/2026/03/Sould-Biodiversity-Analysis-of-Collecting-Eelgrass.pdf?media=1731493129

Located in a listed building in Copenhagen, the Søuld showroom is shaped by a restrained palette of natural materials, t...
16/10/2026

Located in a listed building in Copenhagen, the Søuld showroom is shaped by a restrained palette of natural materials, tactile surfaces and soft acoustics.

Throughout the space, eelgrass is integrated as both an acoustic material and an active part of the interior expression. Its visible fibres, natural colour variations and soft texture create a clear connection to the material’s coastal origin, while helping to reduce reverberation and soften the acoustic character of the rooms.

The interplay between eelgrass, timber and the existing architecture creates a calm and balanced setting where materiality and performance are considered together.

A workspace and showroom defined by natural variation, tactility and comfortable acoustics — allowing the materials themselves to shape the experience of the interior.

Location: Søuld showroom
Photography:

🌊 Can marine resources help shape a healthier, more sustainable built environment?Oceans, critical ecosystems for planet...
13/10/2026

🌊 Can marine resources help shape a healthier, more sustainable built environment?

Oceans, critical ecosystems for planetary health, are gravely threatened by global industrial systems dependent on fossil fuels. Yet, from sargassum and seagrass to kelp and other macroalgae, the ocean is also a source of possibility for the built environment, offering innovative materials for healthy buildings and the potential to remediate marine landscapes through new cultivation, harvesting, and manufacturing.

Join us for our next From Field to Form event, organized in partnership with Parsons Healthy Materials Lab, featuring experts in ocean farming and sourcing alongside manufacturers of biobased marine products and designers to discuss how we can learn from, repair, and build with the world’s oceans.

🗓️ Wed, Nov 11 at 6:30 pm
📍 Wollman Hall, The New School
🎟️ $20 general admission. Free for League members and Parsons students, faculty, and staff.

Panelists:
- Iván García Kerdan, associate professor at Tecnológico de Monterrey
- Shanjana Mahmud, co-founder of seaweed_city
- Tobias Øhrstrøm, co-founder of Søuld

The discussion will be moderated by Mae-Ling J Lokko, assistant professor at Yale University and founder of Willow Technologies.

Register with the link in bio!

Søuld’s acoustic panels offer architects, designers and builders a biobased alternative made from eelgrass. During growt...
13/10/2026

Søuld’s acoustic panels offer architects, designers and builders a biobased alternative made from eelgrass. During growth, eelgrass binds and stores carbon, which remains stored within the finished material. Søuld’s third-party verified EPD confirms that more carbon is stored in the Acoustic Panels than is emitted during production (A1–A3).

Søuld’s products are produced in Denmark and developed with circularity in mind, including the reuse of production offcuts and the possibility of returning material for recycling into new products.

Our EPD is available via sould.dk/products .
Visit sould.dk to learn more, or contact us at [email protected].

For more than 400 years, eelgrass has been part of Danish building culture.On the island of Læsø, naturally washed ashor...
09/10/2026

For more than 400 years, eelgrass has been part of Danish building culture.
On the island of Læsø, naturally washed ashore eelgrass was gathered, dried and woven into the distinctive roofs of the island’s seaweed houses. Some of these roofs have endured for centuries — a testament to the material’s durability and the knowledge developed around working with it.

Eelgrass carries a remarkable set of inherent qualities. Its naturally occurring mineral salts contribute to fire resistance and durability, while its fibrous structure gives the material both softness and resilience. The same porous structure that once made eelgrass valuable as an insulating building material also makes it highly effective at absorbing sound.

At Søuld, we build on this material heritage by adapting eelgrass to contemporary architecture. Through careful processing, the fibres retain their visible texture, natural variation and tactile character while being transformed into high-performance acoustic Mats and Boards for walls and ceilings.

Set within a quiet landscape, this family house by is shaped by a restrained palette of natural materials and a strong ...
05/10/2026

Set within a quiet landscape, this family house by is shaped by a restrained palette of natural materials and a strong connection to Danish craftsmanship.

Inside the main living space, Søuld Acoustic Mats made from eelgrass are integrated alongside brickwork, solid timber and smoked oak panels. The soft, fibrous surface of the eelgrass introduces a tactile contrast to the more structured materials, while its natural brown and green tones sit comfortably within the warm material palette.

Beyond their visual character, the Acoustic Mats contribute high sound absorption, helping to soften the acoustics of the open interior without disrupting the architectural expression. Rather than appearing as an added technical layer, the acoustic material becomes part of the room itself — integrated through texture, proportion and material continuity.

The project reflects an approach where performance and materiality are considered together. Traditional building materials meet a contemporary acoustic solution, with the visible fibres and natural variation of eelgrass adding depth and character to the space.

Architect:
Photography:
Product: Acoustic Mats by .dk

01/10/2026

At Søuld’s Danish production facility, the eelgrass is analyzed, sorted and classified according to colour and quality, then shredded down to shorter standardized fibres to ensure the best aesthetic and mechanical properties. Initially, the shredded fibres are impregnated with a natural, non-toxic flame retardant and mixed with a binder specially designed for cellulose fibres and recyclability. The blended fibres are then formed into eelgrass batts using airlaid technology.

At Restaurant Rosenhøj, Søuld Acoustic Fragments are applied across the walls as a modular acoustic surface, bringing to...
28/09/2026

At Restaurant Rosenhøj, Søuld Acoustic Fragments are applied across the walls as a modular acoustic surface, bringing together sound absorption, tactility and a distinct architectural expression.

Inspired by the logic of tiles, the design breaks the eelgrass surface into smaller components that can be rotated and shifted to create different patterns, depth and shadow. Sharp grooves meet softer rounded edges, creating subtle transitions between each element and allowing the natural fibres and texture of the eelgrass to become part of the visual composition.

The modular format gives architects and designers a high degree of freedom while maintaining a calm, cohesive surface. With Acoustic Class C performance and a design made for disassembly, Acoustic Fragments combine acoustic comfort with flexibility and material character.

Client:
Product: Acoustic Fragments by Søuld
Photography: Tobias Øhrstrøm / Søuld

For more than 400 years, eelgrass has been part of Danish building culture.On the island of Læsø, naturally washed ashor...
25/09/2026

For more than 400 years, eelgrass has been part of Danish building culture.

On the island of Læsø, naturally washed ashore eelgrass was gathered, dried and woven into distinctive thatched roofs — often built by local women using techniques adapted from weaving. Rich in natural mineral salts, the material proved remarkably durable, insulating and resistant to fire and decay, allowing some roofs to endure for centuries.

Today, Søuld builds on this material heritage, translating centuries of knowledge into acoustic materials for contemporary architecture.

Calm begins with the materials that surround us. In this summerhouse on the Danish island of Bornholm, simplicity, tacti...
21/09/2026

Calm begins with the materials that surround us. In this summerhouse on the Danish island of Bornholm, simplicity, tactility and warmth define the architectural expression. Clean lines are balanced by soft, textured surfaces, creating an interior that feels both grounded and inviting.

Integrated into the living space, Søuld Acoustic Boards add depth and acoustic comfort while introducing the distinctive texture of eelgrass. Together with the surrounding wood, the panels create a balanced material palette where sound, light and tactility come together to shape a calm and comfortable living environment.

Architect: Jakob Vad & Gina Berge
Product: Søuld Acoustic Boards
Photography: Jasper Benjamin Green Riis-Hansen

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