Fire-Retardant Cladding Increases the Use of Wood in Demanding Building Projects

Fire protection makes it possible to use wood more and more in different construction. Fire resistance of wood products increases the fire resistance time of the building. Building products are treated in such a way that, in the event of a fire, the processing will slow the burning of the material.

Fire Classification in EU

The fire classification is based on the fire behavior of construction products. The most important issue for firewood construction is the fire classification of surface materials that can affect the spread of fire. Building materials are classified in the EU by fire safety in the Euro Class A-F. Building materials are divided into classes on the basis of their influence on the ignition and diffusion of the fire (categories A1, A2, B, C, D, E, F) and smoke output (s1, s2, s3) and burning dew (d0, d1, d2) . Fire-resistant wooden construction products belong to the B category, which includes only a few construction products with a slight fire effect. In addition, fire classification of building materials always involves determination of smoke formation (s) and burning droplets (d). The flame retardant wood structure product has the highest rating B-s1-d0, which can be obtained by the wood product. The involvement of fire-retardant building material in fire is very limited.

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The characteristics of fire-protected wood are as follows:

B = The product has little effect on the development of the fire

s1 = Smoke formation in the event of fire is very low

d0 = No combustible pieces or drops are released from the product

Siparila’s fireproof exterior and interior panels are part of the highest fire rating for wooden construction products. The Reaction to Fire fire rating (B-s1, d0) for wooden construction products makes it possible to use wood in the highest P1 fire class buildings. The buildings are divided into three P1, P2 and P3 fire classification based on fire safety regulations. The fireproof wooden building material is suitable for façades as well as for prefabricated building blocks as well as public wooden buildings such as carpentry and school facade materials.

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Industrially applied fire protection guarantees high quality

The fire protection treatment of wood products improves the fire resistance of wood. In the event of a fire, the surface treatment agents form a foam on the surface of the wood which is foamed by high temperature. The foamed surface has a good thermal insulation capability that slows down a significant amount of wood material ignition.

High quality fire-retardant treatment is carried out under industrially controlled conditions. In industrial processing, it is possible to standardize the ambient temperature and humidity conditions and to precisely define the amount of application of the surface treatment agent. An adequate fire-retardant film thickness ensures that the wooden construction product meets its fire resistance requirements. An industrial fire protection treatment has the advantage that the surface treatment agent spreads evenly across all surfaces of the panel.

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Fire-proof exterior and interior panels are always CE-marked, guaranteeing the quality and safety of the product. The CE marking requires that the fire protection product used is approved by an authorized research institute. Siparila uses water-based fire-retardants in its panels, the application rates of which are closely monitored during the surface treatment process by weighing. Inspecta audits the fire protection process twice a year.

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Advantages of industrial fire protection treatment for wooden construction products

  • Enables wood surfaces in P1 fire class buildings
  • Ensures wood processing around the wood panel and verifies the amount of application of the fire retardant to be applied
  • industrially fireproof construction products can save on construction costs
  • Fire protection improves the surface finish of the surface
  • The flame retardant contains preservatives that prevent the growth of mold, algae and other microbes on the surface of the tree. A separate wood preservative is therefore unnecessary.
  • Fire-proof wood-exterior cladding has good weather resistance

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