Wood Impregnation

Contract impregnation of timber for construction

Our contract impregnation service ensures the protection of wood for our customers in the wood processing industry. The process is both highly efficient and reliable.

Pressure impregnation for commercial building contractors

Our wood impregnation service for third parties is designed for professional customers in the wood processing industry:

Sawmills that wish to have their construction timber impregnated cost-effectively
Roofing and carpentry contractors who need long-lasting wood protection
Firms specialising in timber framing, timber construction and prefabrication that need dependable quality and predictability in their processes

Pressure impregnation with chromium-free salts

We offer a treatment that is durable, compliant with standards and cost-effective, using modern pressure impregnation technology based on chromium-free salts and with ATG Belgian Technical Approval for use classes 3 and 4.

We process construction timber for commercial users, ⁠guaranteeing consistent quality, predictable lead times and flexible logistics.

The benefits of wood impregnation by Peter Müller:

Technically approved pressure impregnation for use classes 3 & 4 with ATG certificate available on request
Water-soluble, liquid, fixing, chromate- and boron-free wood preservative based on complex copper compounds and a highly effective quaternary ammonium compound
Provides prophylactic protection for wood against fungi and insects that are destructive to wood
Approved biocidal product in accordance with Regulation (EU) No. 528/2012
Free from carcinogens and endocrine disrupting chemicals
Significant capacity for series production and project-specific batches
Seamless documentation and traceability
Area served: Benelux, Germany and Northern France

Why pressure-treated wood is good for our climate

Pressure-treated timber actively contributes to climate protection. The treatment significantly extends the service life of wood products, meaning that the carbon stored in the wood remains bound for longer. At the same time, less new timber is required, as the products remain fit for use for many years. This protects resources and helps lower the overall carbon footprint.

Pressure impregnation for use classes 3 and 4 with certified quality

We impregnate exclusively with Korasit KS2, a chromate- and boron-free wood preservative. This process provides reliable protection against fungi and insects. It ensures a long service life for the wood in all weather-exposed areas of application and complies with all applicable European environmental and industry guidelines.

On request, we can issue ATG impregnation certificates for use class 3 (wood exposed to the weather, not under a roof, but above ground) and use class 4 (wood is in direct contact with the ground).

Sawmills, timber construction companies and public tenders often require such certification. We are a member of the European Wood Protection Association (EWPA) and are committed to complying with its code of conduct for impregnation operations.

pdf Agréments techniques (ATG) avec certification pdf EWPA - Mitglieds-Urkunde

Colour impregnation

Our colour impregnation with chrome-free salts combines uniform colouring of the wood with complete protection provided by the salt solution. The colour pigments are applied during the pressure phase and penetrate the wood evenly. It is perfect for visible applications such as façades, privacy screens, outdoor structures, or garden structures.

Available colours:

Olive: The natural standard tone
Brown: A warm and elegant wood colour
Dark: The intense yet exclusive premium look by Peter Müller

The process of pressure impregnation

Loading of the autoclave: The wooden elements to be treated are loaded into 12-14 metre long containers.
Pre-vacuum: The air is drawn out of the container and the wood pores open up.
Pressure stage: The salt solution is forced into the wood under high pressure. This is the longest part of the process and can take several hours.
Post-vacuum: A post-vacuum is applied after the vessel has been evacuated. This removes any excess impregnating solution so that the timber can no longer drip.
Drying and fixing: The impregnated wood is stored in a dry place until the treatment is fixed. This prevents the wood preservative from being able to leach out, ensuring long-lasting protection.

Every batch is monitored, analysed and documented. This enables us to ensure consistent quality and traceability.