Trees do not distribute material uniformly. They concentrate fibers and mass where stresses require it and lighten parts that carry less load. Strong by Form wants to bring this logic to buildings. The Madrid-based deeptech company has raised €5.8 million in the first closing of its Series A to bring Woodflow-core to market, a structural timber slab designed through computational design and biomimicry.
The company claims the solution can compete with steel and concrete in structural performance while weighing up to 80 percent less and using significantly less timber than some mass timber alternatives. The round is led by boisei investments and includes, among others, CMPC Ventures, FINSA, Ternel, and VX Ventures.
The problem with mass timber is also how much wood it uses
Mass timber has shown that large-scale buildings can use industrialized timber components, but achieving stiffness and long spans often requires thick elements. Strong by Form starts from a different question: instead of using a solid slab, why not place fiber only along the paths where forces travel?
Woodflow uses ribbed geometries and manufacturing processes reminiscent of natural structures. The result is a component designed to extract more performance from every cubic meter of raw material.
Computational design becomes material
In architecture, software is often used to draft shapes. Here, computation directly enters material economics: it simulates loads and optimizes fiber placement to reduce mass without sacrificing performance.
It is an example of a broader trend in deeptech: rather than inventing a new substance, using algorithms and advanced manufacturing to unlock new properties from known materials.
Concrete has a huge advantage: everyone knows how to use it
To compete with a dominant material, it is not enough to be lighter or have a better carbon footprint. Builders, engineers, insurers, and authorities must be able to design, certify, and install the product using reliable procedures.
The capital raised will also be used for certification and production expansion. Strong by Form aims for projects in Spain, France, Germany, and Switzerland over the next two years.
Sustainability must become productivity
The construction sector is extremely sensitive to cost and timelines. A climate tech solution that commands a high green premium risks remaining confined to demonstration projects. Woodflow's most compelling promise is therefore prefabrication: lighter components can be transported and assembled with smaller equipment, while efficient material use can lower costs.
If these advantages hold up outside the lab, carbon reduction becomes the byproduct of a better manufacturing process, not an added cost to justify.
The next materials revolution could be geometric
For centuries, we have improved buildings by inventing stronger materials. Computation now enables another path: using existing ones more intelligently. Lattice structures, topological optimization, and biomimicry can transform timber, metals, and composites without necessarily altering their chemistry.
Strong by Form is still in the phase of proving industrialization and certification at scale. But its concept captures an important point: in a world facing carbon and raw material constraints, engineering will not just have to find new materials. It will have to learn to waste far less of the ones it already has.
