Treatment & Preservation

What type of preservative does BSW Timber use?

BSW Timber utilise pressure treatment plants at our sawmills. We now use the latest generation of wood preservative, TANALITH E, which is approved and used in over 30 countries worldwide. TANALITH E provides a unique, highly effective preservative protection system for timber based on copper triazole technology. The copper is derived from recycled resources and is well known for its fungicidal and insecticidal properties. The triazoles (tebuconazole and propiconazole) are commonly used to protect many of the crops we eat.

What are the benefits for you, the customer, of preserving timber?

When exposed to certain conditions, in particular when the moisture content is allowed to rise above 24%, timber is susceptible to attack from fungi and insects. The service life of properly treated timber is 5 to 10 times longer than untreated wood.

How BSW treat timber

The method of application is in a sealed pressure vessel to which a vacuum is applied to remove air from the wood cells. Preservative is then forced under high pressure into the timber.

After the timber has absorbed the required amount of preservative, all excess is removed from the cylinder and returned to the storage tank for re-use.

BSW offer timber treated with either a green or brown finish.