Bronsø

Thermo wood facade cladding

Bronsø

Thermo wood facade cladding

Bronsø is a thermally treated wooden facade cladding. It is upcycled discarded material from a regular production of wooden goods and has 69% CO₂e reduction versus similar products. We have a range of different profile combinations to choose from.

Combination type: 1

Variant:Profile mix 1

Quantity: m2

Your environmental impact:

7.74 kgwaste saved

0.98 kg

total CO₂e footprint*

*CO₂e footprint and comparison are based on available EPD data including phases A1–A3 and C1–C4. For more info see our sustainability page.

Product	Thermally treated wood facade cladding
Wood	Discarded pine from regular production
Treatment	Thermo treated
Widths	4”, 5” & 6” mixed
Lengths	1,8-5,4 m, (always delivered in various lengths)
Thickness	18 mm
Installation	Front facing screws
Fire class	With fire retardant: B-s1, d0 Without fire retardant: D-s2, d0
Durability	Class 2
Density	390-430 kg/m3 at 5% humidity
Delivery	4 weeks without additional adjustments
Made in	Denmark

From post consumer plastic waste to tabletops

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"I am made from discarded wood turned into facade cladding"

Bronsø delivered at scale

3,330 kg waste saved

Valhøj Skole / Copenhagen, Denmark

20,738 kg waste saved

C. F Møller's Have / Copenhagen, Denmark

15,713 kg waste saved

Høje Taastrup City Hall / Høje Taastrup, Denmark

"I am made from discarded wood"

of waste saved per m²*

CO2eq footprint per m²*

Bronsø thermally treated wooden cladding is upcycled from discarded material from a regular Nordic production of wooden building materials. Sorting criteria today means substantial amounts of material is discarded, despite its high quality. The wood is discarded due to knots, checks and other natural tree characteristics, which has no impact on the durability of the wood. These 'mistakes' means the wood is normally sent to a waste management facility for incineration, despite the woods' high value.

*Per m², based on EPD calculations for phases A1-A3, C1-C4

1 Sorting

We sort out all planks and boards, which normally would be discarded due to aesthetic “defects”, which we embrace as qualities and a part of a tree’s nature

2 Collection

Discarded planks of pine are put to side during regular production based on our sorting criteria

3 Reprofiling

We are re-profiling the planks and boards to make them fit together

4 Installation

When it comes to installation, Bronsø is like any other standard facade cladding you might encounter, meaning most carpenters will be familiar with the installation procedure

395,000 tonnes of wood waste is produced each year in Denmark

Source: Miljøstyrelsen. 2018. Kortlægning af genanvendeligt træaffald i Danmark

66kg

Of wood waste is produced per person on average each year in Denmark

50%

Of wood is recycled into new materials

Wood, as a renewable and ecological material, offers unique benefits for carbon reduction and long-term carbon storage. To fully harness the environmental benefits of wood, two essential considerations must be prioritized: sourcing wood from sustainably managed forests and maximizing the utilization of each tree to minimize waste generation. However, to fully capture these environmental and economic advantages, reuse of wood should be prioritized over recycling. Unlike recycling, which can diminish the structural and aesthetic qualities of wood, reuse preserves the material’s intrinsic value and extends its lifecycle. Prioritizing reuse allows for higher-value applications, reducing the demand for freshly sourced wood and minimizing waste.

From 2016 to 2018, Denmark’s domestic wood consumption rose from 13.1 million to 17.5 million cubic meters. This increase in demand is largely driven by the energy sector, which accounts for 76% of the rise in wood consumption during this period.

Source: Brownell II, P. H., Iliev, B. E., Bentsen, N. S. (2023). Wood flows through the Danish economy. Department of Geosciences and Natural Recourse Management, University of Copenhagen. IGN Report No. March 2023

Collection of wood waste in Denmark

Fig: Graphic from the technology institute

Unique wood features

Cracked knots

Without structural implication

Knot

Corner missing

Knot cracks

Up to 3mm

Checks

Up to 3mm

Silvery grey after time

The wood has a deep golden brown finish from heat treatment. This will turn a silvery grey with continued exposure to UV. The wood needs no further finishing once it has been thermo treated.

Documentation journey

CE Mark	Available
Verified EPD	Available

Downloads

Product booklet Maintenance sheet Seamless

Installation sheet Technical data sheet 3D files

Does it effect the durability that the wood is discarded?

No, the wood is thermo treated all the way through, and the wood is therefore protected in cracks and where nots have fallen out. The wood does not absorb moisture to the same degree as untreated wood

Does Bronsø contain any hazardous substances?

No, the treatment consists exclusively of the use of heat and steam at temperatures between 190° and 212° C. The finished product is 100% natural and completely free of chemicals. During the heat treatment, resin, turpentine, and formaldehyde disappear, which makes the wood resistant to fungal and mould attacks and places the wood in durability class 2 without oil treatment.

What fire retardant/impregnation do you use?

The wood can be supplied fire-impregnated using Burnblock technology, achieving a fire classification of B-s1,d0. The fire impregnation solution is made entirely from natural ingredients, is 100% biodegradable, contains no toxic substances, is pH-neutral, and holds Cradle-to-Cradle GOLD certification. The impregnation is non-leaching and requires no additional surface treatment.

Does Bronsø need any surface treatment?

No, Bronsø does not require surface treatment. Thermo wood is naturally classified as durability class 2 ("durable") according to BS EN 350 standards. It is endorsed by the British Research Establishment (BRE) with an expected service life of 30 years when used for cladding or decking.

Can I order a customised Bronsø cladding?

Yes, you can customize Bronsø cladding by mixing our standard profiles to create a unique look for your project. For large orders, we can tailor the profile to your specific requirements. However, the thickness is fixed at 18mm, the board width depends on available stock, and all boards are supplied in falling lengths.

See our FAQ page or contact sales for more info