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Seagrass Insulation and Timber Structure by the North Sea

Authors:
Anna Plattl, Florian Vogel
Seagrass Insulation and Timber Structure by the North Sea
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Utilizing seagrass for insulation and constructed with cross-laminated timber, this coastal residence integrates sustainable practices while providing a serene living space for its occupants.
5 key facts about this project
01
Utilizes seagrass for insulation, promoting local material use and sustainability.
02
Integrates a marsh plant purification system for effective rainwater management.
03
Features large panoramic windows to enhance connection with the coastal landscape.
04
Incorporates an exhaust gas heat exchanger for efficient hot water preparation.
05
Constructed with cross-laminated timber for improved thermal performance.

The design is situated between the gentle dunes and the North Sea coast, aiming to create a sustainable living space for its residents. The layout incorporates key principles of energy efficiency and resource management. With a focus on blending into the natural landscape, the design addresses essential modern needs while promoting eco-friendly practices.

Energy Generation

The roof is designed to generate solar energy, providing enough electricity for two residents. This feature not only serves energy needs but also includes a power storage system for excess production. This stored energy can be used for heating and hot water, supporting a sustainable lifestyle.

Water Management

Rainwater collection plays an important role in the functionality of the design. A marsh plant purification system is located on the roof, which treats rainwater and recycles wastewater to enhance usability. A recycling shower reduces fresh water consumption to just 10 liters per use, exemplifying practical resource management.

Spatial Arrangement

Large windows throughout the home frame views of the sea, providing a visual connection to the surroundings. These windows allow ample natural light into the space, creating a warm and inviting atmosphere. A light shaft further enhances natural illumination, ensuring that daylight reaches even the more secluded areas of the house.

Material Selection

The structural elements of the building are made from cross-laminated timber, which is known for its effective thermal properties. This choice helps maintain comfortable temperatures while aligning with sustainable building practices. Seagrass, sourced locally, serves as insulation, valued for its breathability and natural qualities. The exterior features CO2-treated spruce wood, typical of Scandinavian design, promoting durability and environmental harmony.

A notable detail is the use of cork mats, which provide sound insulation. This addition fosters a peaceful atmosphere within the home, ensuring that daily life remains calm and undisturbed by external noise.

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Vancouver Tall Challenge: Building Higher Downtown

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Competition organisers

The Vancouver Tall Challenge: Building Higher Downtown is an international architecture competition organized by Buildner in collaboration with the City of Vancouver and the University of British Columbia’s School of Architecture and Landscape Architecture (SALA). The competition invites architects, designers, planners, and creative thinkers to explore innovative approaches to tall buildings in Vancouver’s downtown core, focusing on sustainability, livability, urban density, public space, and the city’s strong connection to nature. As Vancouver continues to grow, participants are challenged to rethink how vertical development can enhance urban life and contribute to a more vibrant, inclusive, and resilient city identity.

The competition offers a total prize fund of $15,000 CAD, with winning proposals selected by an international jury of architects, planners, academics, and city-building professionals. Key dates include the final registration deadline on October 29, 2026, submission deadline on November 30, 2026, and winners announcement on January 26, 2027. Full competition details, requirements, and registration information are available at architecturecompetitions.com/VancouverTallChallenge

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