Trykimpregnering

Trykimpregnering, also known as creosote treatment, is a method of wood preservation. It involves the pressure impregnation of wood with creosote, a tar-like substance derived from coal tar. This process aims to protect the wood from decay, fungi, and insect attack, significantly extending its service life.

The trykimpregnering process typically occurs in a specialized cylinder. Wood is placed inside, and then a vacuum is applied to remove air from the wood cells. Creosote is then pumped into the cylinder under high pressure, forcing it deep into the wood structure. After impregnation, a final vacuum is often applied to remove excess creosote from the surface.

Historically, trykimpregnering has been widely used for outdoor applications such as railway sleepers, utility poles, and marine pilings due to its effectiveness and durability. However, concerns have been raised regarding the potential health and environmental impacts of creosote. These concerns have led to restrictions and bans on its use in many regions, particularly for residential applications. Alternative wood preservation methods have gained prominence as a result.