€5.8m · Series A · Deeptech · Madrid, Spain
Strong by Form, a Madrid-based developer of structural timber technology, has secured the €5.8m first close of a planned €10m Series A led by boisei investments. CMPC Ventures, VX Ventures, Ternel, Savia Ventures, Teampact Ventures, Axel Carbon, FINSA and family offices also participated.
The Chile-founded company uses computational design and biomimicry to place wood fibre along structural load paths. Its Woodflow-core product is a timber floor slab designed to span more than 10 metres while weighing around 80% less than steel and concrete alternatives. The company says the approach can use substantially less wood than comparable mass-timber systems; those performance and cost claims still need validation through certification and projects.
The capital will expand manufacturing capacity in Europe, complete structural certification and support commercial adoption in Spain, France, Germany and Switzerland.
Certification turns material performance into a saleable system
Construction customers do not buy a promising material in isolation. Engineers, contractors and insurers need verified load data, repeatable manufacturing quality and a product that fits building codes and installation workflows. For Strong by Form, European certification is therefore part of the product: without it, weight and material-efficiency gains cannot move from prototypes into specified projects.
The commercial model also depends on manufacturing partners. Woodflow's computational designs can help timber producers place material where loads require it, but partners must reproduce that geometry at consistent quality and competitive cost. Scaling capacity alongside certification should let the company test whether lighter slabs reduce transport, foundation and installation requirements enough to offset adoption risk.
Boisei's lead investment and the return of forestry groups such as CMPC and FINSA connect capital with potential supply-chain and production expertise. The next proof point is a certified slab delivered in real buildings, where structural performance, installation time and total project cost can be compared with concrete and conventional mass timber.
