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Information wood / playground equipment

The wood shows mould or resin, is it common? Mould or resin doesn’t influence the quality of wood. Without a doubt, you can build up the playground equipment with these planks and beams.   We can’t avoid some mould. This mould arises as water is pressed into the wood during impregnation. As we wrap the products, to protect them against damage, in foil some mould might arise in some cases. This mould doesn’t influence the quality of wood. In most cases you can easily remove the mould by means of a cloth. The stains will disappear, as soon as the wood is exposed to the sun.   Resin is released during impregnation. It is a specific wood property. Resin doesn’t influence the quality of wood. The resin will dry and crumble off automatically as soon as the wood is exposed to the sun.

Planks show cracks and knots, is it common? Cracks and knots are natural wood properties which, in principle, don’t influence the quality of wood. Without a doubt, you can build up the playground equipment with these planks and beams.   Should I treat the wood by paining it? No, you don’t have to paint the wood. The wood we use for our playground equipment has been impregnated and, because of that, is weatherproof. If desired, you can paint it. We recommend to use exterior stain.

Wood properties Wood is a remarkable, versatile material, applicable in many types and sizes. Wood is a wonderful, characteristic and warm material. Besides, it is strong, sustainable and intractable. Wood is one of the few construction materials which grows outside, is durable and thus an infinite raw material. While the tree grows, it will help the environment we live in by absorbing the carbon dioxide and producing oxygen. In general, the influence of wood on the environment is neutral, even if we take cutting, transport and treatment into account. Nowadays, there is more wood available than a century ago and this quantity is increasing year by year. So, in the 21st century we will still have plenty of wood available.  

Cracks or splitsDuring the drying process or during dry periods, cracks and splits might arise due to a non-uniform wood structure, especially with round wood. Dependent on the weather conditions (e.g. rain, dry weather, sun or shadow) the wood might be cracked to a greater or lesser extent. These cracks and splits are allowed according to the DIN 4074 norm.

Resin Resin is unavoidable for resinous wood during warm weather. Dark paint might reinforce resin. TIP: Use a piece of flat wood and carefully remove the resin.

Blue deposit The impregnation protects the wood. Due to storage moist spots and mould could arise. Once the wood has been dried, the mould can easily be removed (sanding). After a short period of time the dark spot will fade away.

Volume change A characteristic wood property is volume change by drying or moisture absorption. Dependent on the humidity of the wood it could lose approximately 10% of its volume during the drying process.

Rough surfaces In spite of great carefulness and sharp means the surface of milled wood could show partially rough spots, especially near knots.

Salt formation Superficial white and greenish spots might arise on impregnated wood. It concerns resin which is mixed with impregnation agent. The copper salts oxidize to the surface (greenish) and will slowly disappear.

Discolouration During impregnation various colour pigments are added to the wood. Dependant on the wood and its storage these pigments will become visible. These colour difference will slowly disappear.

Seams By treating the wood, seams might become visible. A seam doesn’t mean damage, it is a natural appearance in the wood.

Seams and knots Seams and knots are typical wood properties. Wood with knots are often used for the production of garden products.