Class B fire-rated profiles
Show productsAt Carpentier, you will find various timber cladding profiles that meet Class B reaction to fire standards. Our thermo bamboo cladding qualifies for this reaction to fire rating without any additional fire-retardant treatment. For other wood varieties, we offer effective solutions to reach the same fire safety standards.
Class B reaction to fire timber cladding
For fire safety reasons, façades often need to meet Class B reaction to fire standards. Architects, entrepreneurs and property developers must provide the required reaction to fire certification. At Carpentier, you will find a wide range of timber cladding that comes with this certification, thus meeting the highest safety standards. The reports are available online and can be easily downloaded using your personal login.
Thermo bamboo: naturally safe
Our closed joint thermo bamboo cladding is a lasting option that meets Class B reaction to fire standards without additional treatment. So thermo bamboo is the ideal solution for projects in which fire safety and style are key.
The Switi project in Amsterdam is a good example of this. Here our HOTwood bamboo shiplap QC was used as timber cladding. This closed joint cladding profile meets the B-s1, d0 reaction to fire standard without fire-retardant treatment. The biosourced new housing project won the National Timber Construction Award 2024 in the Netherlands in the serial timber construction category. This prize highlights the sustainable and innovative possibilities for this material.
Fire-retardant treatments for other wood varieties
Sustainable wood varieties, such as thermo pine and ash, require fire-retardant treatment to meet Class B reaction to fire standards. At Carpentier, our fire-retardant treatment is carried out in vacuum conditions in an autoclave. This is a natural and effective method for improving the reaction to fire class. Thanks to this process, our cladding meets Class B reaction to fire standards, meaning you can create attractive façades that are fire-resistant.
Until recently, only closed joint façade coverings could qualify for Class B reaction to fire standards. But now, vertical open joint cladding can do too.
To find out more, read our innovation blog on Class B reaction to fire open joint cladding
An innovation in open joint cladding
Currently, the Class B reaction to fire standard can only be achieved with closed and open joint cladding fitted in the traditional way. However, together with Grad®, we are working on a patented installation system using a fire-retardant clip. This will allow for cladding with open joints of up to 30-35mm to obtain a Class B reaction to fire rating. This ground-breaking innovation is currently undergoing testing and is scheduled for launch in the second half of 2026.
Discover our high-quality cladding that meets Class B reaction to fire standards
HOTwood ash Closed line - fire-retardant treated
SV2
Product specifications
Profile: 20 x 52 (coverage width 45) x 1500mm or more
OR: 20 x 72 (coverage width 65) x 1500mm or more
Closed profile
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for spacing of at least 2mm, since HOTwood may expand slightly in humid conditions.
HOTwood ash Double rhombus - fire-retardant treated
DSB1
Product specifications
Profile: 20 x 155 (coverage width 146) x 1500mm or more
Closed profile
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for spacing of at least 2mm, since HOTwood may expand slightly in humid conditions.
HOTwood ash Shiplap QC - fire-retardant treated
S3QC
Product specifications
QuickClip® profile: 20 x 150 (coverage width 142) x 1500mm or more
Fitted with grooves
Including the Grad® installation system, consisting of aluminium joists (12 x 55mm)
with pre-mounted clips for placement at 60cm intervals
(1.9m joist per m²)
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
For stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
Our most popular finishes: brushed and black
HOTwood ash T&G Plank - fire-retardant treated
PLAN
Product specifications
Profile: 20 x 132mm (coverage width 123mm)
With tongue and groove, also on the edges
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
Lengths (mixed selection only):
- 35%: 900 to 1500mm;
- 65%: 1800 to 3000mm.
Our most popular finishes: brushed and black
Please note: always install with the flaw-free 'A' surface facing upwards (see diagram) and allow for at least 2mm expansion at the tongue and groove joint. HOTwood may expand slightly in humid conditions.
HOTwood ash Triple - fire-retardant treated
TRIP
Product specifications
Profile: 20 x 132 (coverage width 126) x 1500mm or more
Closed profile
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for spacing of at least 2mm, since HOTwood may expand slightly in humid conditions.
On demand only
HOTwood bamboo Plus line closed - fire-retardant
SV+
Product specifications
Profile: 18 x 65 (coverage width 52,5) | 100 (coverage width 87,5) | 137 (coverage width 124,5) | 155 (coverage width 142,5) x 1850mm
Closed profile with fixed widths in variable pattern
4 smooth sides
Untreated
Tongue and groove on both ends
Perfect for blind screwing
Meets B-s1,d0 reaction to fire standards, without a fire-retardant treatment
HOTwood bamboo Shiplap QC - fire-retardant
S3QC
Product specifications
QuickClip® profile: 20 x 136 (coverage width 123,5) x 1850mm
Fitted with grooves
Including the Grad® installation system, consisting of aluminium joists (12 x 55mm)
with pre-mounted clips for placement at 60cm intervals
(1.9m joist per m²)
Meets B-s1,d0 reaction to fire standards, without a fire-retardant treatment
For vertical cladding: for stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
Also available without the installation system
Also available in HOTwood ash and HOTwood Clear Pine
Downloads
HOTwood Clear Pine Jump line brushed - fire-retardant treated
SV4
Product specifications
Combination of four profiles: 20 x 65 (coverage width 46) | 20 x 115 (coverage width 96) | 20 x 138 (coverage width 119) | 26 x 65 (coverage width 46) x 3000mm or more, including 2 x the 26 x 65 mm profile for each set
Fitted with tongue and groove
Varying widths and thicknesses give a dynamic play of lines
Brushed finish - optional: oil finish
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
For the very best protection, we recommend applying a finish with a UV-resistant oil or paint before installation. This finish will need to be reapplied regularly before it wears off. If you leave your Clear Pine cladding uncoated, dust and other airborne particles are more likely to adhere to the porous surface of the natural wood. For the reaction to fire class you require, we can offer certified colour finishes from the Tikkurila, Teknoshield and Remmers brands.
Please note:
- Allow for at least a 3mm gap at the tongue and groove joint, since HOTwood may expand slightly in humid conditions
- Use hidden nailing in the tongue and face nailing in the plank.
HOTwood clear pine Shiplap QC - fire-retardant treated
S3QC
Product specifications
QuickClip® profile: 20 × 138 (coverage width 131) x 3000mm or more
Fitted with grooves on underside
Including the Grad® installation system, consisting of aluminium joists (12 x 55mm)
with pre-mounted clips for placement at 60cm intervals
(1.9m joist per m²)
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
Vertical installation* is advised
*For stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
For the very best protection, we recommend applying a finish with a UV-resistant oil or paint before installation. This finish will need to be reapplied regularly before it wears off. If you leave your Clear Pine cladding uncoated, dust and other airborne particles are more likely to adhere to the porous surface of the natural wood.
Our most popular finish: natural look; for the reaction to fire class you require, we can offer certified colour finishes from the Tikkurila, Teknoshield and Remmers brands.
HOTwood Clear Pine T&G Plank - fire-retardant treated
CP5
Product specifications
Profile: 19,5 x 138 (coverage width 119) x 3600mm or more
Fitted with tongue and groove
Including fire-retardant treatment to meet B-s1,d0 reaction to fire standards
For the very best protection, we recommend applying a finish with a UV-resistant oil or paint before installation. This finish will need to be reapplied regularly before it wears off. If you leave your Clear Pine cladding uncoated, dust and other airborne particles are more likely to adhere to the porous surface of the natural wood.
Our most popular finish: natural look for the reaction to fire class you require, we can offer certified colour finishes from the Tikkurila, Teknoshield and Remmers brands.
Please note:
- Only for the underside of canopies and eaves (more protected from the weather)
- Allow for at least a 3mm gap at the tongue and groove joint, since HOTwood may expand slightly in humid conditions
- Use hidden nailing in the tongue and face nailing in the plank.
HOTwood Clear Pine T&G Plank - fire-retardant treated
CP1
Product specifications
Profile: 20 x 138 (coverage width 134) x 3000mm or more
Fitted with tongue and groove
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
For the very best protection, we recommend applying a finish with a UV-resistant oil or paint before installation. This finish will need to be reapplied regularly before it wears off. If you leave your Clear Pine cladding uncoated, dust and other airborne particles are more likely to adhere to the porous surface of the natural wood.
Our most popular finish: natural look; for the reaction to fire class you require, we can offer certified colour finishes from the Tikkurila, Teknoshield and Remmers brands.
Please note:
- Only for the underside of canopies and eaves (more protected from the weather)
- Allow for at least a 3mm gap at the tongue and groove joint, since HOTwood may expand slightly in humid conditions
- Use hidden nailing in the tongue and face nailing in the plank.
HOTwood pine Cubus QC - fire-retardant treated
CBQC
Product specifications
QuickClip® profile: 42 x 42 x 2700 mm or more
Interval of 18 mm
Including the Grad® installation system with Pyroclip, consisting of aluminium joists* (12 x 55 mm)
with pre-mounted clips for placement at 60 cm intervals
(1.9 m joist per m²)
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
For stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
*Under some conditions, the black coating on the rails may fade over time. For this reason, we advise customers to have aluminium rails anodised when using profiles with gaps of more than 10 mm.
HOTwood pine Double rhombus - fire-retardant treated
DSB1
Product specifications
Profile: 26 x 140 (coverage width 132) x 2700mm or more
Fitted with tongue & groove
Closed profile
Including fire-retardant treatment to meet B-s3,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for at least 2mm expansion at the tongue and groove joint, since HOTwood may expand slightly in humid conditions.
Downloads
HOTwood pine Fine line QC - fire-retardant treated
SV3QC
Product specifications
QuickClip® profile: 20 x 40 x 2700 mm or more
Square edged
Interval of 6 mm
Including the Grad® installation system with Pyroclip, consisting of aluminium joists (12 x 55 mm) with pre-mounted clips for placement at 60 cm intervals
(1.9 m joist per m²)
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
For stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
HOTwood pine Ignite T&G Plank - charred look - fire-retardant treated
PLAN
Product specifications
Profile: 20 x 140 (coverage width 132) x 2700mm or more
Fitted with tongue and groove
Extremely durable
The charred look is a perfect imitation of the characteristic dragon-scale pattern of charred wood: deep black, embossed and brushed
Easy maintenance: apply a fresh coat of water-based black paint (Tikkurila Ultra Matt) every five to seven years
Good to know: the charred finish will retain its beauty forever
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
An economical alternative for charred wood
For interior and exterior use
Please note: allow for at least 2mm expansion at the tongue and groove joint, since HOTwood may expand slightly in humid conditions.
HOTwood pine Jump line - brushed & black finish - fire-retardant treated
SV4
Product specifications
Combination of four profiles: 20 x 90 (coverage width 71) | 26 x 68 (coverage width 49) | 20 x 115 (coverage width 96|20 x 68 (coverage width 49) | 26 x 68 (coverage width 49) x 3000mm or more
Fitted with tongue and groove
Varying widths and thicknesses give a dynamic play of lines
Brushed black finish (standard 7-year finish warranty) - Sand finish also available
Perfect for blind nailing
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
Please note: allow for at least 2mm expansion at the tongue and groove joint, since HOTwood may expand slightly in humid conditions.
HOTwood pine Plus line QC - fire-retardant treated
SV+QC
Product specifications
QuickClip® profile: 20 x 40|65|90|140 x 2700 mm or more
Fixed widths in variable pattern
Square edges
Interval of 6 mm
Including the Grad® installation system with Pyroclip, consisting of aluminium joists (12 x 55 mm) with pre-mounted clips for placement at 60 cm intervals
(1.9 m joist per m²)
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
For stable and circular installation, we strongly recommend you use Grad® clip grips. This extremely handy tool enables you to lock the cladding boards on the aluminium rail and prevents any slipping due to gravity. One clip grip per groove is enough for each board.
HOTwood pine T&G Plank - fire-retardant treated
N1
Product specifications
Profile: 20 x 140 (coverage width 132) x 2700mm or more
Fitted with tongue & groove
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for at least 2mm expansion at the tongue and groove joint, since HOTwood may expand slightly in humid conditions.
Cheaper alternative available in 17 mm thickness
HOTwood pine T&G Plank Plus line - Brushed black - fire-retardant treated
N1 SV+
Product specifications
Profile: 20 x 68 (coverage width 60) | 115 (coverage width 107) | 140 (coverage width 132) x 3000mm or more
Widths available separately or in combination
Closed profile
Fitted with tongue & groove
Brushed black finish (standard 7-year finish warranty)
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
Please note: allow for at least 2mm expansion at the tongue and groove joint, since HOTwood may expand slightly in humid conditions.
HOTwood pine Triple - fire-retardant treated
TRIP
Product specifications
Profile: 20 x 140 (coverage width 134) x 1800mm or more
Closed profile
Including fire-retardant treatment to meet B-s2,d0 reaction to fire standards
Our most popular finishes: brushed and black
Please note: allow for spacing of at least 2mm, since HOTwood may expand slightly in humid conditions.
Planed Douglas fir with 6 mm open joint- fire-retardant treated
TP
Product specifications
Profile: 25 x 140 x 3000 | 3500 | 4000 | 4500 mm
Planed on all 4 sides
Visible side sawed smoothly
Corners rounded
Including fire-retardant treatment to meet B-s3,d0 reaction to fire standard
Coloured finish included, colour of your choice
Traditional fixing with 6 mm open joint (horizontal or vertical installation)
70% PEFC
Additional preservation treatment with Woodlife HL-50
Additional quality sorting
Dry
