In the event of a raging fire in a ventilated façade construction, the wooden framework behind may be directly exposed to fire. The contribution of the underlying timber framework to a façade fire must then be as limited as possible. If a ventilated façade construction must comply with fire class B, a fire report of the façade cladding and the battening to which it is attached is required. By treating the timber battens with HOLZ PROF FIRE RETARDANT, the fire classification of the timber facades will improve to class B-s1,d0.
HOLZ PROF FIRE RETARDANT is already widely used in the industrial sector. By entering into a close cooperation with HolzProf, TWEHA has included this product in its product range so that this technology can also be used in façade constructions with wooden battening.

HOLZ PROF FIRE RETARDANT is an eco-friendly fire retardant for complete wood protection.
It is a high quality, water based, flame retardant, designed for the treatment of wood and wooden components in buildings and other structures to become resistant to fire and flame propagation.
WHY CHOOSE HOLZ PROF FIRE RETARDANT?
HOLZ PROF FIRE RETARDANT is highly certified on the variety of wood species: from solid wood (soft- and hardwoods) to plywood, from exotic to modified wood types. All in accordance with EU Regulations and has been approved internationally by accredited laboratories and meets the requirements of the Exova BM TRADA A-Mark and A+ Fire Safety schemes.
HOLZ PROF FIRE RETARDANT complies with the highest fire classification for solid wood:
– Euro class according to EN 13501-1: B-S1, d0
– Classification according BS 476, Part 6 &&: Class 0
– Euro class according to EN 13501-1: Bfl-s1
– Euro class according to EN 13501-2: K110/K210

HOLZ PROF FIRE RETARDANT is colourless and odourless and, if required, can be over-coated with TWEHA WoodProtect or TWEHA Blacken to obtain a black look in the joints between the panels.
The unique patented technology permits HOLZ PROF FIRE RETARDANT to help extend the lifetime of treated wood, transforming it into a more fungal and Blue stain resistant substrate.
Once absorbed into the surface of the wood the fire retardant combines chemically within the cell structure but does not form a surface finish, which allows the wood to breath naturally.

THE RESULT OF THE TREATMENT IS A NATURAL, RESISTANT AND FIREPROOF WOOD WITH EUROCLASS B-s1, d0
CERTIFICATION AND APPROVALS OF HOLZ PROF FIRE RETARDANT
The efficiency of HOLZ PROF FIRE RETARDANT is tested and approved internationally by well-known accredited laboratories and certification centers and meets the classifications of:
• Fireproof efficiency Euroclass B-s1-d0, (UK class 0) on solid wood, according to EN 13501-1 (EN13823 and EN 11925-2)
• Fire resistance test of covering K110 and K210 according to EN 13501-2 (EN 14135, EN 1363-1 and EN 1363-2)
• Fire testing according to ISO 5660
• Fire protection of floor covering A2/B Fl according to EN-13501-1 (EN ISO 11925-2:2010 and ISO 9239-1)

HOLZ PROF FIRE RETARDANT APPLICATION
The product is easy to use and does not require a protective finishing coat. It is not harmful for humans, animals and the environment. It is important to follow the directions for use.
The application can be done with brush, roller or spray: usually 3 coats that should be applied at intervals of minimum 1 hour. Or it can be applied by an immersing procedure in tanks or under vacuum conditions in an autoclave.
Consumption: 300 g/m2 (270 ml/m2) on most softwoods and hardwoods, on Western Red Cedar 400 g/m2 (360 m/l per m2) in order to ensure the depth of impregnation of 2,0 – 4,5mm. With the capacity of a 5-liter can, 150 m¹ or 80 m¹ of respectively 19 x 45 or 19 x 95 mm wooden battening can be processed.
The substrate to be treated must be dry, free from dust, bark, paints and varnishes, and from other contaminants.
Do not process frozen wood and do not mix HOLZ PROF FIRE RETARDANT with other products. HOLZ PROF FIRE RETARDANT treated wood does not require any additional protective coat. It can be over-coated where a final decorative finish is required. Before overcoating the substrate must be dry and meet the moisture content requirements of the chosen finishing product. A trial procedure is always recommended before the full final coat is applied.
The drying times are dependent on absorption of the substrate and drying conditions (temperatures and humidity). The approximate drying time is 24-72 hours at +20 C/65 relative humidity.