
Biogenic summer house
A residential summer house using natural
materials, featuringGranuTex 44 Bio installed
as blown roof insulation.
Facts about this project:
Client: Private homeowner
Location: Thorsager, Danmark
Scope: Roof insulation for a summer house
Construction: Attic
Insulation: GranuTex 44 Bio
Year project: 2025
Partners: JDH-Byg og Olaf Bahn
Project overview
This project is a privately built summer house for a couple who wanted a solution that would be easy to maintain and comfortable to live in. The house is located in a forested area, where both temperature and moisture conditions vary throughout the year, so this made it important to choose materials that could perform consistently over time. From the beginning, the focus was on keeping the construction simple and reliable, and the goal was not to overcomplicate the build, but to use materials that fit naturally with the structure and the way the house would be used.
The project was developed as a nature-connected summer house designed with a strong focus on comfort, material transparency, and long-term performance. The house was built using a wooden structural system and insulated with textile-based insulation solutions chosen to support both indoor comfort and a lower material footprint. The project combined practical construction requirements with the homeowners’ wish for a calm and natural living environment.
The roof construction was insulated using blown-in textile insulation, allowing the material to fully adapt to complex and hard-to-reach roof cavities. This solution helped create an even thermal layer throughout the roof structure while reducing thermal bridges and supporting stable indoor temperatures throughout the year.
The exterior envelope was designed to work together with breathable construction principles. The insulation system supports moisture-permeable assemblies often used in timber-based buildings, helping the structure manage humidity while maintaining durability and indoor comfort over time.
The installation process was carried out in collaboration with specialized installers (Olaf Bahn) to ensure consistent material distribution and reliable performance across the entire roof construction.
Project impact
By using textile-based insulation in this project, existing textile resources were given a second life within the built environment instead of becoming waste. The project demonstrates how recycled materials can be integrated into modern construction while contributing to lower resource consumption and a more thoughtful approach to building materials.
Impact
650 kg
of total textile waste saved with this project
Final result
This project reflects a clear and straightforward approach to building, where material choices and execution play an essential role in the final result. By combining bio-based insulation with a well-planned installation process, the project achieves consistent performance without unnecessary complexity.
Beyond technical performance, the house also responds to the needs of its owners - offering a comfortable indoor environment, reduced noise levels, and a natural living experience that fits its surroundings.









