Wood Wool Board

Wood wool boards combine timber fibres with a mineral binder to create a rigid board that supports thermal performance, sound absorption and moisture control. At bio space we supply wood wool boards suited to both new build and renovation work, particularly where durability and impact resistance matter alongside insulation performance. When installed as part of a full breathable build, wood wool boards work alongside natural insulation materials and lime-based render finishes to maintain vapour permeability across the structure. This makes them a perfect option for projects where breathability and acoustic performance are key.

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Frequently asked questions
What role do wood wool boards play within an insulation system?

Wood wool boards act as a rigid, breathable surface layer within a wider system. They provide impact resistance and acoustic absorption while supporting finishes such as lime plaster. The main insulation layer sits behind or between the structure, delivering the required thermal performance. This makes them particularly useful where durability and moisture management are required.
What level of thermal performance can be expected from wood wool boards?

Wood wool boards provide limited thermal insulation and are not designed to meet U-value targets on their own. Their thermal conductivity is higher than materials such as wood fibre or cork, so they act as a supporting layer rather than the primary insulator. To achieve required performance, they are typically paired with insulation such as wood fibre board, sheep wool or hemp within the build-up. This allows the system to deliver both thermal efficiency and breathability.
Wood wool vs wood fibre boards: what’s the difference?

Wood fibre boards are primarily used for thermal insulation, offering lower thermal conductivity and helping achieve target U-values. Wood wool boards, by contrast, are denser and designed for surface strength, acoustic performance and durability. In most specifications, the two are used together rather than as alternatives. Wood fibre provides the insulation, while wood wool forms the protective and breathable outer layer.
When should wood wool boards not be used?

Wood wool boards are not suitable where high thermal performance is required from a single material layer. They should also be avoided in systems where vapour control layers or impermeable finishes prevent moisture movement. Using them in isolation without a supporting insulation layer will result in poor thermal performance. They work best as part of a correctly specified breathable system.
Do wood wool boards meet industry standards and building regulations?

Wood wool boards are manufactured to meet recognised standards such as BS EN 13168 for thermal insulation products, along with fire classification standards including EN 13501-1. These standards cover aspects such as reaction to fire, durability and overall product performance within construction systems. While wood wool boards offer inherent fire resistance and acoustic benefits, compliance with building regulations depends on the full system build-up rather than the board alone. Many products are also manufactured to meet environmental certifications, supporting their use in low-impact and breathable construction projects.