Wooden fire-retardant cladding Euroclass B / C: the BIME®1 process


In some cases a Euroclass C or B facade may be required, especially for the Public Assembly Buildings when the "C+D rule" shall not apply, or for some kinds of Appartment Buildings (4 floors and over mainly).

This can be reached for wood treated following Woodenha's BIME®1 process:  it consists of a fire-retardant treatment in autoclave followed by Kiln Drying and coating with the BIME®F1 wood stain. Depending on the wall system mount, the wood classification can then reach Euroclass C and sometimes Euroclass B. Woodenha now holds numerous Euroclasse Classification Reports and Certificates for Durability Outdoor.


The BIME®1 (french accronym for Bois Ignifugé dans la Masse pour Extérieur) Process


Test of durability have been made on BIME®1 Douglas Fir and BIME®1 Larch. Both have succeeded Woodenha holds a Certificate of Durability for those two species. Others species are being tested such as thermo-treated wood, Red Cedar etc...

The Euroclass test (Single Burning Item / SBI) has been made first on continuous building systems (groove-and-tongue type of cladding) going from 19mm to 43mm of thickness. With years, Woodenha has certified other systems such as lattice-work cladding (Douglas Fir, Larch, Western Red Cedar and High-Temperature-Treated Wood), solid wood pannels (Douglas Fir and Larch).

Any other combination of species/mounting system for which no report is available should be SBI-tested first. Woodenha can run such tests on demand.

Download our litterature on exterior fire-retardant cladding



Above: some buildings made with Euroclass C or Euroclass  B BIME®1 fire-retardant cladding (see all our works)


Need a tip for your project or a quote?

Get in touch with an expert team member for any query about fire retardant treatment, intumescent coating or kiln drying for timber and panelboards.

Contact us

Any question? Have a look at our FAQ first!

In this section, you will find the answers to the main questions we've been asked: regulations, industrial process, do's and don'ts etc.. It's all there (almost)

Read the FAQ

Lost in the fireproof wood jargon?

We've thought that you might need help to understand perfectly the fire retardant treatment subtleties... Here's our lexicon.

Read the glossary