Why treat your timber
Timber is treated to increase it´s natural durability. If timber is not protected with a preventive type of treatment, it soon decays due to attack of insects and or fungi.
The timber Use Class system, as defined in UNE EN 335-1 is used across the timber industry to determine how your timber should be treated so that it stands up to the job it is designed to do.
Timber is located indoors, and is not exposed to humidity. Example, internal building timbers with no risk of wetting.
Timber is located indoors, but could eventually be exposed to humidity. The degree of humidity in the timber is ocasionally above 20%. Example the Wood in the roofing of an indoor swimming-pool.
Timber located outdoors, but with no direct contact with the ground. The degree of humidity in the timber is frequently above 20%.
Use Class 3.1
External timbers used above ground contact and protected from water acummulation on it´s surface.
Use Class 3.2
External timbers used above ground contact and unprotected from the weather.
External timbers used in ground or fresh water contact, the degree of humidity in the timber is permanently above 20%.
Timbers that is in direct contact with salty waters.
Our treatments
Treatments for Use Class 4
Creosote tar has been used for timber treatment purposes for the last 150 years. It´s main uses are treatment of utility poles, treatment of railroad ties and treatment of timber in contact with salty waters.
Creosote tar is a mixture of products derived from the distillation of coal in temperaturas ranging from 900 ºC to 1200 ºC. We use creosote “maderoil grade B” for treatment of our wooden poles.
We treat timber with the Rüping system. Timber treated by us, reaches a penetration level of NP5, which means that 100% of the sapwood is impregnated by the wood preservative. The retention of the preservative is a mínimum of 125 kilograms of creosote per cubic meter of sapwood treated.
Timber treated by us, reaches a penetration level of NP5, which means that 100% of the sapwood is impregnated by the wood preservative. The retention of the preservative is a mínimum of 16,7 kilograms of product per cubic meter of sapwood treated.
The copper based product that we use for treatment is Tanalith-E 3474. We treat timber with Bethell system. Timber treated by us, reaches a penetration level of NP5, which means that 100% of the sapwood is impregnated by the wood preservative. The retention of the preservative is a mínimum of 25,4 kilograms of product per cubic meter of sapwood treated.