The History of Träullit.

Wood wool, water and cement.

Träullit was founded in 1946 by Lennart Rääf and his father, Axel Rääf, in the small municipality of Ydre in the province of Östergötland, Sweden. The idea of using wood fibres in building materials emerged after a relative visited Austria, where the technique of bonding wood wool with mineral binders had been used since the early 1900s. Lennart and Axel, who worked in wood tar production and other forest-based industries, quickly recognized the ingenuity of this simple yet efficient combination of Swedish spruce wood wool, cement, and water. Production soon began.

Initially, Träullit focused on producing natural wood wool–based insulation, but later expanded its product portfolio to include wood wool ceiling panels. During the first twenty years, all products were made entirely by hand. As demand for wood wool products continued to grow, an automated production line was installed in 1965 — at the same site where Träullit’s production remains to this day. Thanks to the material’s wide range of functional characteristics — such as sound absorption, heat storage, moisture regulation, and fire resistance — the decision to continuously develop new products and broaden the product range came naturally. Today, Träullit manufactures a wide variety of cement-bonded wood wool products for numerous applications and construction types.

As of 2024, Träullit is part of the global industrial group Saint-Gobain.