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Common questions

Can impregnated wood be burned at fireplace?

Impregnated wood must not be burned at home. Impregnated wood must be taken to a specific collection point at a landfill, building materials retailer or to the waste station.


Can impregnated wood be painted?

Yes. Paint adheres better on impregnated wood than on non-impregnated wood. The wood should, however, be dry enough, u < 18%.


What kinds of labels are used on impregnated wood?

Impregnation plants staple a label to the end of each piece of impregnated wood. The label shows the name of the manufacturer and the protection class (A or AB). The Key Flag in the label is a sign of a Finnish product.


Why should I choose impregnated wood?

Untreated wood starts to decay when the moisture in the structure is over 18 %. When the wood is exposed to the weather, the moisture content can easily rise over 20 % and, in the contact with the ground, it can be more than over 30 %. Impregnated wood is a domestic product with the longest service life.


What happens to the impregnated wood without surface treatment?

Untreated impregnated wood doesn't decay without surface treatment. The surface might splinter over the years and the color turns grey because of the sunlight.


Can impregnated wood be used in a kitchen garden?

Yes, but it is recommended not to place it in immediate contact with the food-bearing plants.


Why is impregnated wood green?

The green color comes from the copper in the preservatives used.


Is impregnated wood available in any other colors?

Yes, it is also available in brown and in black color. The impregnation process and technique is the same in all products except the color pigment added to the preservative.


How does the recycling of impregnated wood work?

Finland has a unique recycling system for impregnated wood. Impregnated wood waste

should be submitted to special recycling points for impregnated wood or to waste facilities.

How can the cracking of the wood be prevented?

The best way to reduce cracking is proper surface treatment. The wood should be dry enough before treatment.


Can impregnated wood mildew?

Mold retardant is mixed into the preservative in the impregnation process. Sometimes when the wood is used in extremely wet places the surface can gather some mold blotches but they are only in the surface and are easy to clean.