​WISA-SpruceFR is a fire-retardant plywood product for use in construction. The fire retardant treatment significantly improves fire resistance properties of the product without compromising
the plywood panel’s excellent technical performance. WISA-SpruceFR works equally as well as the base product – WISA-Spruce – in all kind of construction, especially in structural uses and load bearing structures.


  • Fire-retardart
  • Highest fire classification a wood based panel can get
  • Sustainable
  • Lightweight


Construction, especially strucural uses and load bearing structures
Temporary building

Fire classification

According to standard EN 13501-1:
B-s1, d0 (roof and wall structures)
Bfl-s1 (floors)


Weather resistant gluing according to EN 314-2/class 3 Exterior. WISA-Spruce fulfils the requirements of EN 13986 E1 low formaldehyde emission class.


Face veneer grades II and III (comply with standard EN 635-3).
Additional grade G (improved/solid grade II).
Fire retardant treatment is applied on both surfaces.


T & G on request

Standard panel sizes (mm)

Length from 2400 to 2500 mm
Width from 1200 to 1250 mm

Thicknesses and weights

​Nominal thickness (mm) ​​Number of plies ​​Thickness (mm) ​​Weight kg/m2

Sizes and thicknesses relating to moisture content 8 - 10 %.
Thicknesses and tolerances fulfil EN 315 requirements.