GUTEX Ultratherm

Product Description


  • Consistently uniform board dimensions make installation quicker and easier
  • Homogeneous, single-ply construction
  • Makes structures wind-tight
  • No additional covering or taping of joints is necessary for roofs with pitches exceeding 15°.
  • Suitable as temporary roof covering (max. 3 months)
  • Adhesive nail tapes or sealants are not required.
  • Ideal for upgrading the thermal insulation of existing structures
  • Reduces thermal bridging
  • Superior thermal storage capacity provides outstanding insulation against heat in the summer.
  • Significantly improves acoustic insulation
  • Regulates humidity
  • Allows vapour diffusion
  • Guaranteed by Germany's Association of Roofers
  • Wood is a sustainable, recyclable natural resource
  • Made in Germany
  • Biologically safe (natureplus® certified)
  • Manufactured from untreated Black Forest spruce and fir

– Additives:

4.0 % polyurethane resin (binder)
1.5% paraffin (hydrophobic agent)



  • Upgrading of insulation in new and old buildings
  • Rain-tight sarking
  • Sheathing of timber frame structures (vented facades)
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Technical Detail

Joint Type Tongue & Groove
Thickness (mm) 50/60/80/100/120/140/160
Length x width (mm) 1780 x 600
Actual Coverage length x width (mm) 1749 x 569 (0.995 m²)

Square metres per board (m2) 1.07m²
Weight per board (kg) 9.6/11.6/15.4/19.3/23.1/27/30.8
Weight per m2 (kg) 9.0/10.8/14.4/18.0/21.6/25.2/28.8
Boards per pallet 40/34/26/20/18/14/12
Square metres per pallet (m2)
Weight per pallet (kg) 400
Bulk density (kg/m3) 180
Nominal thermal conductivity λD(W/mK) 0.042
Nominal Thermal resistance
RD (m2K/W)
Vapour diffusion factor (μ) 3
sd-value (m) 0.15/0.18/0.24/0.30/0.36/0.42/0.48
Compressive stress/ strength (kPa) 150
Tensile strength perpendicular to board
surface (kPa)
Air flow resistivity (kPa·s/m3) 100
Short-term water absorption (kg/m²) < 1.0
Specific heat capacity (J/kgK) 2100
Fire reaction Euro Class as per
DIN EN 13501-1


Data Sheets

Abdichtmasse Sealing CompoundAbdichtmasse Sealing CompoundTechnical Data Sheet
GUTEX Ultratherm GUTEX Ultratherm Technical Data Sheet
Thermal Roof Solutions Thermal Roof Solutions Product GuideGeneral Documents