GUTEX Multitherm

Product Description


  • Manufactured from untreated Black Forest spruce and fir
    – Additives:
    4.0 % polyurethane resin (binder)
    1.0% paraffin (hydrophobic agent)



  • Sheathing directly over timber frame constructions, over wood sheathing and over masonry under the facing in vented facade constructions.
  • Full boards install under rafters without interruption (not suitable for between rafter use)



  • Consistently uniform board dimensions make installation quicker and easier
  • Homogeneous, single-ply construction
  • Makes structures wind-tight
  • Superior moisture resistance due to hydrophobic treatment
  • Ideal for upgrading the thermal insulation of existing structures
  • Reduces thermal bridging
  • Exceptional specific heat capacity
  • Maximum protection against the heat in summer
  • Significantly improves soundproofing
  • Regulates humidity
  • Allows vapour diffusion
  • Wood is a sustainable, recyclable natural resource.
  • Made in Germany
  • Biologically safe (natureplus® certified)

Technical Detail

Joint Type Tongue & Groove
Thickness (mm) 20/40/60/80/100/120/140/ 160
Length x width (mm) 1270 x 600
Actual Coverage length x width (mm) 1250 x 580
Square metres per board (m2) 0.76
Weight per board (kg) 2.1/4.3/6.4/8.5/10.7/12.8/
Weight per m2 (kg) 2.8/5.6/8.4/11.2/14/16.8/
19.6 /22.4

Weight per pallet (kg) 510
Boards per pallet 220/108/72/54/44/36/32/28
Square metres per pallet (m2) 167.6/82.3/54.86/41.15/ 33.53/
Bulk density (kg/m3) 140
Nominal thermal conductivity λD(W/mK) 0.039
Thermal resistance
RD (m2K/W)
Vapour diffusion factor (μ) 3
sd-value (m) 0.06/0.12/0.18/0.24/0.30/
Compressive stress/ strength (kPa) 70
Tensile strength perpendicular to board
surface (kPa)
Air flow resistivity (kPa·s/m3) 100
Short-term water absorption (kg/m²) ≤ 2
Specific heat capacity (J/kgK) 2100
Fire reaction Euro Class as per
DIN EN 13501-1

Data Sheets

GUTEX Multitherm GUTEX Multitherm Technical Data Sheet