A Danish collaboration between mycelium company Rebound and architecture studio Det Levende Hus has led to what they claim is the world’s first mass-produced interior door made from fungal mycelium. The prototype points to a shift towards regenerative materials in everyday architectural elements. It offers a low-impact alternative to conventional timber doors.

Mycelium As A Regenerative Building Material

The door uses mycelium—the fast-growing root structure of fungi—as its core material. The team grows it in moulds to create a rigid and lightweight panel. This process takes around two weeks and produces a material with natural acoustic insulation.

By using mycelium, the designers reduce the need for slow-growing hardwoods in high-volume applications. This makes the material both renewable and scalable.

A timber frame surrounds the mycelium core. The team made it from reclaimed and surplus wood, including offcuts from Danish flooring manufacturer Dinesen. This combination of biobased and recycled materials supports a circular design approach and reduces waste.

Designed For Performance And Compliance

The team engineered the door to meet current residential building standards. It performs well in terms of fire safety and moisture resistance.

During the growing process, they add an extra biobased layer to strengthen the structure. This “bio-welding” method improves fire resistance without using synthetic adhesives or extra production steps. As a result, the process remains efficient and low-impact.

Material Expression And Design Flexibility

The project also explores the aesthetic and sensory qualities of mycelium. Designers can adjust the colour and texture during the growth phase. The surface can appear smooth and refined or more natural and organic.

They can also apply finishes such as clay to suit different interiors. This flexibility allows architects and interior designers to integrate biobased materials without sacrificing visual quality.

Circular Detailing And Product Integration

The prototype includes a door handle made from recycled seashells. Architect Bjarne Hammer designed it for Danish hardware brand Randi. The material creates a smooth yet tactile surface. It shows how natural and waste-based materials can work together in high-quality products.

Towards Scalable Biobased Interiors

The team will install the mycelium door in the Kaerhytten low-impact housing project in Denmark, set for completion in 2026. They are also developing other mycelium-based products, including acoustic wall panels and ceilings.

Mycelium is gaining ground in architecture, from insulation to large-scale installations. This project shows how the material can move into mainstream building components.

Source: Dezeen
Photos: Rebound