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What natural features of wood can we meet?

Wood is a living raw material, the dimensions, appearance, weight, form and color of which may change without affecting the functionality and quality of the finished product. Therefore, some of its features may not be subject to complaint, in particular:

  • KNOTS

Knots are one of the natural features of wood. The number and size of healthy, at least one-sided and strongly ingrown knots are not limited in wood to garden products.

  • RESIN LEAKAGE

Resin leaks in coniferous wood are a natural phenomenon. In the case of painted wood with open pores, it is possible for resin to appear on its surface. Resin stains can be carefully removed with non-aggressive solvents (Isopropanol, turpentine).

  • SALT EFFICIENCY

A common effect on pressure impregnated wood is a greenish discoloration of the surface, especially in the area of knots. These are resin leaks which, under the influence of impregnation (copper salt), turn white to green. These stains fade over time.

Color changes. In the case of pressure impregnation, in which a dye is applied simultaneously with the impregnation, a color change or discoloration may occur. Exposure to sunlight compensates for differences in color over time.

  • BLUE DISCOLORATION

Bluish discoloration of raw wood, most often in the form of stripes, is caused by blue fungi, which is harmless to the wood, and does not affect its strength. After impregnation, this process is stopped, but there are visible discoloration of a dark color.

  • MOLDS

Pressure-impregnated wood, which can exhibit a high degree of moisture, has a tendency to become moldy and mold. However, they do not penetrate deep into the wood and do not have a harmful effect on it. These stains can be wiped off. They level out as they air out within a short period of time.

  • INEQUALITIES

When processed perpendicular to the grain direction, rough surfaces and small fraying are possible. The described signs result from the properties of wood and are not subject to complaint.

  • BLOWING and SHRINKING 

A characteristic property of wood are (depending on humidity) volumetric changes: shrinkage and swelling. Particularly when the timber is installed tightly (e.g. with tongue and groove), shrinkage and the associated gaps in the joints must be taken into account. As a result of shrinkage processes as the wood dries, cracks and warping may appear. They are acceptable and do not adversely affect the static properties and durability of the wood.

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