Superwood is fully impregnated spruce planks without any heavy metals, usually delivered in quality US/Kvinta with a moisture content of 16-20%.
Superwood treatment will normally not change the treated woods physical and mechanical properties. Superwood™ will therefore behave as untreated spruce in areas such as weather graying, cracks, shakes and grooves around the pith. There may sporadically occur process-related changes, such as cracks and small indentations in the wood.
Wood Preservation Effect
Superwood is protected against fungi and blue stain according to DS / EN 335-1, class 3: Wood above ground contact, often moistened to a moisture content of 20%.
The Impregnation agent, SC200, consists of three organic fungicides (propiconazole, tebuconazole and IPBC). The impregnating agent is colorless and is EPA approved in accordance with applicable law and are successfully time-tested in accordance with current standards.
When the impregnation is finished, the wood can be delivered and no additional fixation or drying is required before use.
The impregnation occurs in a closed process engineering facility with recycling of all excipients in the following process:
The wood is placed in the impregnation container and fed SC200.
Carbon dioxide is supplied, and the pressure is increased in the container. When it has reached over 74 bar and the temperature has increased to 31°C, the carbon dioxide goes into the so-called supercritical state, where it acts as carrier for fungicides in SC200.
After wandering SC200 with the carbon dioxide into the wood.
The pressure in the impregnation container is reduced to atmospheric pressure by passing the carbon dioxide out of the timber and container. Fungicides are left in the wood.
Superwood has received the EU environmental award for cleaner technology.
Area of application
Superwood is very suitable for outdoor use, eg. for facade cladding.
Superwood should not be used in permanent contact with soil or water, and it may not be used in direct contact with foodstuffs.
Handling and processing
Superwood is fully impregnated. Therefore, it can be processed without having exposed unimpregnated wood. Note that the outer 6 mm are better protected because of the higher content of impregnation.
When the processing the wood, take the same precautions as when processing commonly untreated softwood. This means that the dust load by working with speed tools should be minimized.
Superwood can be processed with tooling as used for the unimpregnated softwood and with the same degree of wear.
Nails, screws, and brackets
Superwood does not contain substances that are corrosive towards metals. There should only be used nails, screws and fittings that are approved for outdoor use. As a minimum galvanized nails and screws - the best is, however, stainless steel (grade A2). As the wood is dry, we recommend pre-drilling - especially at the end grain.
The wood surface will eventually be affected and grow gray by weather and climate impacts. To avoid this, Superwood can be surface treated when assembled. For the selection and execution of surface treatments see the instructions from the manufacturers of wood and finishes. Always clean the surface prior to treatment. Resin accumulations on the surface should be removed with a stiff brush or a rag soaked in rubbing alcohol before coating.
Especially horizontal surfaces such as terraces are exposed to direct sunlight. This is the cause of rapid drying of the wood, while the ultraviolet radiation breaks down the wood surface. This makes the surface gradually grayish, discolored and porous. Combined with the fact that water is not so easily drawn off from a horizontal surface, it means that there will appear large variations in the moisture content. Hens, the risk of cracking (shakes) increases.
These conditions mean that it is difficult to achieve a durable surface treatment of horizontal surfaces relative to vertical. If the surface treatment is omitted, the graying is to be expected. Note also that the horizontal surfaces are more exposed to dirt and algae growth, which, however, are largely washed off with a stiff brush, water, and possibly the use of reason cleaner or detergent.
The sun's UV exposure also means that the outer wood fibers loosen, and it can make the surface "wool" and eventually lead to "washboard-structure". If the surface later is to be coated it must first be cleaned with loose wood fibers, e.g. stiff brush or sandpaper before coating starts.
As Superwood does not contain any heavy metals, it can be disposed of as ordinary combustible waste.