Should I paint the wood?
No, you do not have to paint the wood. The timber used for our climbing frames is impregnated and therefore weatherproof.
Which are the natural characteristics of wood?
Wood comes from a natural growing process. It is raw material taken from nature. In contrast to industrially manufactured materials, it is not homogeneous. Each piece of wood is unique and has characteristics of a timeless natural material. Apart from good physical properties, a relatively small weight and the usually easy workability, wood comes in natural variations in grain, color, checking with knots of various sizes. These "imperfections" do not compromise the structural integrity of the climbing frames and swingsets.
Checking is the appearance of cracks or splits in the wood as the wood dries out. Depending upon wood and location of the product(sunny or shady location) this can occur differently strongly and fade away again. According to DIN4074 suchs cracks are permissible because they do not affect the durability.
Resin on the timber is not avoidable with resinous woods during warm weather or direct sun exposure. This characteristic can be strengthened by a dark, absorb-paint. Tip: Use a flat piece of wood and remove carefully the run out resin.
Mould and blue
The wood is well protected by the impregnation. With pressure impregnated wood however superficial damp stains and mould can develop during storage. The high residual moisture in the wood favours this. Usually the upper-laminar mould can be easily removed after the drying process. The optics adapts itself again after a short time.
A charasteristic behaviour of wood is the volume change by moisture absorption and/or drying process. Depending upon dampness of the material contruction units can differently "work". During the pressure impregnation the wood is fully satisfied. It exhibits therefore after drying process the largest shrinking.
The surface of planed/milled woods can despite great care and sharp tools exhibit partial raw places. Especially on the knot-holes.
With pressure treated wood superficial white -greenish stains can occur. These are the discharges of the resin in the wood, mixed with the contents of the impregnation material. The cuprous salts loosened in the impregnation oxidize at the surface to lightgreen marks and fade away after sometime.
Colour & Shades
Because of the impregnating, the colour of the wood may differ from piece to piece. The pigment behaviour is depending on the wood, the wood section, the humidity of the content and the temperature of the material. These differences will disappear.
By the processing of the wood this grainconsisting of a porous fabric can become partly or completely visible. The grain is not damage to the wood, but the natural appearance of this material.
Branches & Grain
Branches and grain belong to the characteristic of wood. In the production of garden products often wood with grain and branches is used.
Is the timber Impregnated?
Wolmanit CX is a range of liquid, chromium-free preservatives which are used preventively to combat wood-destroying fungi, including those causing soft rot, and insects, including termites. Extensive international testing has confirmed the effectiveness of Wolmanit CX. Wolmanit CX is based on Copper HDO, a fungicide that has been successfully used in wood preservation for many years and has undergone some of the most intensive toxicological testing of any wood-preserving fungicide in the world. After their rapid fixation in the wood, the aqueous Wolmanit CX products are resistant to leaching and to the elements, and are not harmful to plants. This impregnation is ideal for protecting all kinds of constructional timbers, both indoors and outdoors, for timbers in contact with earth and water, especially those used in play equipment, posts, palisades, fences and much more. Wolmanit CX gives the wood a light greenish colour.