FIRE RETARDANT TREATMENT FOR TIMBER SPECIES AND THICKNESSES
Please see below a full list of timber and plywood species and thicknesses available for either DRICON or NON-COM Exterior fire retardant treatment, to Euroclass B and C in accordance with EN 13501-1 and supported with independent Classification Reports.


Timber Species

Minimum Treatable Thickness

DRICON

NON-COM Exterior

Ash

18mm

Cumaru

20mm

Douglas fir

18mm

European redwood

12mm

European whitewood

12mm

Ipe

19mm

Iroko

18mm

Larch

18mm

Larch featheredge

18mm tapering to 9mm

Larch profiled

18mm/9mm total minimum exposed thickness

Oak (European)

18mm

Oak (American White)
 18mm  

 

Opepe

21mm

ThermoWood pine

19mm

ThermoWood spruce

18mm

ThermoWood spruce featheredge

18mm tapering to 9mm

Western Red Cedar

17mm

Western Red Cedar

12mm

Western Red Cedar featheredge

17mm tapering to 8mm

Birch (Plywood)

Dependent on Euroclass required

Spruce (Plywood)

Dependent on Euroclass required

Far Eastern Hardwood (Plywood)

Dependent on Euroclass required