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FiberTech RWH

Rigid underlay based on wood fibre
  • Description
  • Applications
  • Technical specifications
  • Stock range
  • Characteristics

The MUF glued FiberTech RWH board (MDF.RWH) with smooth TopFinish layer is a vapour-permeable fibreboard (MDF) perfectly suited as underlay, rigid underlay, for pitched roofs or diffusion-open wall panels.

The FiberTech RWH board is suitable for applications in service class 2 (limited in temperature and air humidity) as base plate (rigid underlay) for wall or roof, but RWH can also be used as additional thermal and acoustic insulation.

FiberTech RWH is available as standard with a straight edge, but can also be finished with a tongue and groove system (TG). The tongue and groove profile ensures high stability and easy installation.

  • Rigid underlay in inclined roofs and walls
  • FiberTech RWH also provides extra thermal and sound insulation. 
General characteristics + Norm Unit Average values
Thickness EN 324-1 mm 16
Moisture level EN 322 % 6-10
Thermal conductivity coefficient (notional value) EN 13986 W/m.K 0,10
Specific heat capacity c kJ/kg.K 2100
Water vapour permeability µ EN iso 12572 (dry cup) 12
Reaction to fire EN 13501-1 D-s2,d0
Water permeability EN 12567 Impermeable
Technical characteristics + Norm Unit 5/95 percentile values
Bending strength EN 310 N/mm² 14
Internal bond EN 319 N/mm² 0,30
Bending stiffness EN 310 N/mm² 1600
Swelling/24h EN 317 % 10
Internal bond after cyclic test EN 321 option 1 N/mm² 0,15
Swelling after cyclic test EN 321 option 1 % 15
Sanded Quantities per pack
Thickness EN 324-1 16
2440x610 100
2800x1196 50

Please contact our sales team for more information about the technical capabilities regarding custom thicknesses and dimensions, and for minimum order requirements.

Material type
Wood fibre boards
Rigid underlay for pitched roof and wall
The heat-treated TopFinish surface (TF) creates an extra-hard, sealed surface with greater impact resistance, and it is easy to clean. The increased concentration of natural paraffin in the surface increases its moisture resistance. Our boards with a TopFinish surface also score highly for air tightness. These advantages mean that boards with a TopFinish surface are particularly suitable for building applications.
Use in humid conditions

Tongue and groove
The tongue and groove profile ensures high stability and simple installation. The system makes it possible to nail or screw the panels blind.