lisäämisparkka

Lisäämisparkka refers to a method of wood preservation primarily used in Finland, also known by the English term "pressure impregnation" or "vacuum impregnation" in a broader context. This technique involves forcing a wood preservative solution into the wood under pressure. The primary goal is to protect the wood from decay, rot, and insect infestation, thereby extending its service life.

The process typically begins by placing the wood into a treatment cylinder. Air is then removed from the cylinder, creating a vacuum. This vacuum helps to open up the wood cells, allowing for better penetration of the preservative. Once the vacuum is established, the cylinder is flooded with the preservative solution, which is often a water-based chemical containing biocides and fungicides. Pressure is then applied to the cylinder, forcing the preservative deep into the wood structure. After the impregnation period, the excess preservative is removed, and a final vacuum may be applied to draw out any remaining free liquid.

Lisäämisparkka is commonly applied to timber used in outdoor applications where it is exposed to moisture and potential biological attack. This includes construction materials like fence posts, decking, terrace wood, and structural elements for outdoor buildings. The effectiveness of the treatment depends on factors such as the type of wood, the desired level of protection, and the specific preservative used. The environmental impact and safety of the preservatives are also important considerations in the application of this method.