Fire retardant treatment
Fire Retardant
Reaction to fire classification up
to B-s1,d0
CE certified
EN14915:2013
100% natural
& biodegradable
Indoor &
outdoor applications
Our certified offer
Thanks 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 EN 13501.
| Type of wood | Density | Min. thickness | Ventilated cavity | Reaction to fire class |
| ThermoWood®Spruce | 314-434 | 15-42 mm | 40 mm | B-s1,d0 |
| ThermoWood®Ash | 590-680 | 15-42 mm | 40 mm | B-s1,d0 |
| ThermoWood®Pine | 450-500 | 15-42 mm | 40 mm | B-s1,d0 |
| ThermoWood®Ayous | 269-374 | 15-42 mm | 40 mm | B-s1,d0 |
| ThermoWood®Ayous | 305-470 | 15 mm | 40 mm | B-s2,d0/B-s3,d0 |
| ThermoWood®Fraké | 410-730 | 15-42 mm | 40 mm | B-s1,d0 |
| ThermoWood®Poplar | 350-500 | 15-42 mm | 40 mm | B-s2,d0 |
Colour coating with Sherwin Williams
| Type of wood | Density | Min. thickness | Ventilated cavity | Reaction to fire class |
| Solid wood | 355-536 | 19 mm | 40 mm | B-s1,d0 |
| ThermoWood® | 450-500 | 19 mm | 40 mm | B-s2,d0 |
Sherwin Williams SC1420 + EG1570 on wood treated with Burnblock®, certified B-s1,d0
Pre greying with Masquelack
| Type of wood | Density | Min. thickness | Ventilated cavity | Reaction to fire class |
| Solid wood | 355-536 | 19 mm | 40 mm | B-s1,d0 |
| ThermoWood® | 450-500 | 19 mm | 40 mm | B-s2,d0 |
Masquelack on wood treated with Burnblock®, certified B-s1,d0
Wood protector met SIOO:X
| Type of wood | Density | Min. thickness | Ventilated cavity | Reaction to fire class |
| Solid wood | 355-536 | 19 mm | 40 mm | B-s1,d0 |
| ThermoWood® | 450-500 | 19 mm | 40 mm | B-s2,d0 |
Sioo:X Wood Protector + Sioo:X Surface Protector on Burnblock® B,s1-d0 certified wood
Except: ThermoWood® poplar (B-s2,d0)
Statutory requirements
To limit or delay the spreading of fires via the wooden facade, the Royal Decree imposes various requirements with regard to the reaction to fire of wooden facade cladding in its end-use conditions (in other words, as present on site).
This means that when assessing the reaction to fire of the wooden facade cladding, one must take into account the potential influence of the underlying material layers and the way in which they are fastened.
Reaction to fire class D-s3,d1
Reaction to fire class D-s3,d1 To comply with fire reaction class D-s3,d1, it depends on the wood product you choose which conditions you need to meet. The new fire regulations (20
Reaction to fire class B-s3,d1 or C-s3,d1
Reaction to fire class B-s3,d1 or C-s3,d1 Where the requirements of B-s3,d1 or C-s3,d1 need to be met, it is essential to treat the timber with a fire retardant coating and you n
Durability through time
Durability through time No coating is required to counteract leaching The ThermoWood® treated with fire retardant, Burnblock®, doesn’t require a coating in order to counter
Requirements reaction to fire
Requirements reaction to fire To limit or delay the spreading of fires via the wooden facade, the Royal Decree imposes various requirements with regard to the reaction to fire of w
Under pressure with a 100% biodegradable fire retardant
With LDCwood®, we can give timber products a fire retardant treatment with Burnblock® in our autoclave under pressure. At LDCwood® production site in Ostend, both our autoclave and the drying killns guarantee a qualitative treatment in accordance with current standards.
CE certified
In accordance with Regulation 305/2011/EU of the European Parliament and the Council, this certificate applies to the following construction product: wall and facade cladding of solid wood treated with fire retardant.
Burnblock®
Burnblock® is a 100% natural fire retardant for wood. It is effective on all absorbent materials such as timber and panels and has been certified to the highest European standards.
- 100% biodegradable
- 100% natural ingredients
- gold-level Cradle-to-Cradleᵀᴹ Certification
- all the ingredients used in Burnblock® can also be found in our diets or bodies
- none of the ingredients used is on the EU REACH list
- energy-efficient
- pH-neutral – no corrosion
- extremely low VOC
