Fire retardant treated timber, ThermoWood® and panels
> Our productsThanks to the process in our autoclave, many types of timber and panels have been tested and awarded reaction to fire classification B-s1,d0, in accordance with the European standard EN13501.

Solid wood
Types | Density | Min. thickness | Ventilated cavity | Reaction to fire classification |
---|---|---|---|---|
Deal | 355-536 | 15 mm | 40 mm | B-s1,d0 |
Pine | 450-600 | 21 mm | B-s1,d0 | |
Oak | 500-750 | 20 mm | B-s1,d0 | |
Western Red Cedar | 316-494 | 15 mm | 40 mm | B-s1,d0 |
Siberian larchs | 650-750 | 15 mm | 40 mm | B-s1,d0 / B-s2,d0 |
Sapeli | 325-690 | 15 mm | 40 mm | B-s1,d0 / B-s2,d0 |
According to classification: EN 13501-1:2007+A1:2009 and EN 13501-2:2007+A1:2009 and EN 13501-1-1:2018
According to classification: EN 13823 (SBI) and EN 14135:2004
Thermowood®
Types | Density | Min. thickness | Ventilated cavity | Reaction to fire classification |
---|---|---|---|---|
ThermoWood® deal | 314-434 | 15 mm | 40 mm | B-s1,d0 / B-s2,d0 |
ThermoWood® ash | 590-680 | 15 mm | 40 mm | B-s1,d0 / B-s2,d0 |
ThermoWood® pine | 450-500 | 15 mm | 40 mm | B-s1,d0 / B-s2,d0 |
ThermoWood® ayous | 269-374 | 15 mm | 40 mm | B-s2,d0 / B-s3,d0 |
Accoya | 400-700 | 19 mm | 40 mm | B-s1,d0 / B-s2,d0 |
According to classification: EN 13501-1:2007+A1:2009 and EN 13501-2:2007+A1:2009 and EN 13501-1-1:2018
According to classification: EN 13823 (SBI) and EN 14135:2004
Panels
Types | Density | Min. thickness | Ventilated cavity | Reaction to fire classification *1 | Reaction to fire classification *2 |
---|---|---|---|---|---|
Birch plywood | 650-750 | 12 mm | 40 mm | B-s1,d0 | K1, K2,10/B-s1,d0 |
Pine multiplex | 450-600 | 12 mm | 40 mm | B-s1,d0 | K1, K2,10/B-s1,d0 |
LVL | 550-600 | 27 mm | B-s1,d0 |
According to classification: EN 13501-1:2007+A1:2009 and EN 13501-2:2007+A1:2009 and EN 13501-1-1:2018
According to classification: EN 13823 (SBI) and EN 14135:2004
Reaction to fire class sp fire 105
Types | Density | Min. thickness | Reaction to fire classification *1 | Reaction to fire classification *2 |
---|---|---|---|---|
Deal | 350-500 | 21 mm | B-s1,d0 | SP 105 |
The aforementioned façade cladding has been tested in accordance with the following: SP Fire 105, issue 5, dated 1994-09 and has been evaluated as meeting the requirements for the outside of buildings in class Br1.
Indication test according to EN 13823 (sbi)
Types | Density | Min. thickness | Reaction to fire classification |
---|---|---|---|
Bamboo | 600-700 | 26 mm | B-s1,d0 |
The test indicates a B-s1,d0 classification according to EN 13501-1
EN45545-2:2013 Fire behaviour of materials and components of rail vehicles
Types | Density | Min. thickness | Reaction to fire classification |
---|---|---|---|
Birch plywood | 700-750 | 12 mm | R10; HL1/HL2/HL3 (floor coverings) |
Birch plywood | 700-750 | 12 mm | R1; HL1/HL2 (walls) |
Birch plywood | 700-750 | 12 mm | R7; HL1/HL2 (external walls) |
FINISHING VARNISH for interior applications on timber and timber products
Types | Density | Min. thickness | Reaction to fire classification |
---|---|---|---|
Pine multiplex | 300-684 | 12 mm | B-s1,d0 |
Burnblock® varnish is a finish for materials that have been treated with Burnblock®. The fully certified treatment is only possible by combining LW-121/45/BB varnish with Burnblock®-treated timber. (does not contribute to the spread of fire)
Testing institute
Independent 3rd party institute.
BRE UK
Building science centre
DBI
Fire and securityRISE
RISE
The Swedish Research Institute
MPA Eberswalde
Materialprüfanstalt Brandenburg
AIDIMME
Instituto Tecnológico
WFR-Gent
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Disclaimer: Burnblock® updates technical information as and when necessary. Please ensure you have the latest revision of this datasheet. www.burnblock.com
Contact
Do you wish to receive more information or advice concerning the reaction to fire classes, don't hesitate to contact our Technical sales advisor.