Schneider Multitherm 140 (Tongue & Groove)
The Schneider Multitherm140 tongue and groove woodfibre insulation board is a high-performance, natural fibre insulation for internal use on timber frame walls, ceilings and roofs.
Available in a range of thicknesses, this woodfibre board offers a practical and environmentally conscious alternative to synthetic internal insulation systems. It is ideal for use in retrofit, heritage conservation, and low-energy building projects where maintaining breathability and indoor air quality is a priority.
The boards are fixed to the internal face of the timber framework (studs / joists / rafters) using screws and washers, and due to the edge profile joints do not have to land on timbers, reducing wastage and simplifying installation.
These boards are used in our timber frame and warm roof systems, and can be installed to any internal studwork or timber structure. The boards provide insulation and function as a plaster carrier when finished with appropriate lime plaster.
The Multitherm140 boards are also available in a square edge edge profile suitable for Insulating masonry substrates – please see these boards here.
Thicknesses over 100mm are available to order.
Manufactured from sustainably sourced wood fibres, this board provides excellent thermal resistance, improving energy efficiency and comfort throughout the year. Its natural composition ensures low embodied carbon, and it is fully recyclable at the end of its service life, supporting sustainable building practices. Its hygroscopic properties allow it to absorb and release moisture, helping to regulate indoor humidity and reduce the risk of condensation and mould growth—making it ideal for traditional solid wall buildings and modern eco-renovations alike.
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Product Standard |
EN13171 |
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Density |
140 [kg/m³] |
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Nominal value of thermal conductivity λD |
0.040 [W/(mK)] |
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Rated value of thermal conductivity λB |
0.042 [W/(mK)] |
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Reaction to fire according to DIN EN 13501-1 |
E |
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Construction material class according to DIN 4102-1 |
B2 |
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Full declaration |
Wood fibers, PMDI gluing, paraffin |
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Production process |
Dry process |
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Compressive stress at 10% compression |
≥ 100 [kPa] |
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Tensile strength perpendicular to the plane of the board |
≥ 20 [kPa] |
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Modulus of elasticity E(d) |
≥ 1,45 [N/mm2] |
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Water vapor diffusion resistance μ |
3 |
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Linear flow resistance |
> 75 [kPa·s/m²] |
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Short time water absorption |
< 1.0 [kg/m²] |
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Specific heat capacity |
2100 [J/(kgK)] |
Fixings
- Walls 600mm centres
- Ceiling 400mm centres
- Fixings 8 / m2
For detailed application advice see our Internal Wall Insulation System
For plastering options onto the boards please see Plastering onto boards
- Store and install boards in a dry condition
- Install the boards horizontally
- Cut with a common woodworking tool with adequate dust extraction
- Do not use MULTITHERM 140 as load-bearing component
Suitable for internally insulating ceilings, roofs & timber framed walls
Suitable for external insulation over rafters or timber framed walls if combined with an appropriate weatherproof membrane
Boards – 2000mm x 580mm
Customer Questions
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