Useful to know
PREPARATION OF WOOD FOR PROCESSING
- The wood must be free of dirt, coatings, ice and snow.
- Both the body and the housing must be removed.
- All traces of damage by wood pests or fungi should be removed from the wood.
- The wood should be dried until its moisture content is less than 28% or equal to the specified value.
- If possible, carry out all cutting, machining, planing, notching and drilling work before impregnation (see section on post-impregnation machining).
- Do not install metal accessories before impregnation.
SUPPLY OF IMPREGNATED WOOD FROM A WOOD IMPREGNATION PLANT:
- Wood and plywood impregnated with Celcure wood preservative should be stored in an impregnated drying area marked accordingly and protected from rain and direct sunlight until dry and before distribution and use. The time required depends on the weather conditions, the type of wood, the size of the wood, the size of the packages and whether the material is sawn, planed, sanded or not. However, this usually takes 48 hours. The consumer and the supplier need to be in close contact to determine if the wood is ready for removal.
- In other countries, local regulations may apply.
DRYING AFTER IMPREGNATION
- The time between impregnation with the wood impregnation liquid and the application of the impregnated wood is usually sufficient for drying.
- In the case of high-precision work, it is advisable to machine the wood at an equilibrium moisture content appropriate to the conditions of use, and the contractor is responsible for drying if necessary.
- In the case of air drying, the free supply of air to the wood from all sides is ensured. Drying is faster and more complete at lower humidity. Therefore, the wood must be sparsely stacked with intermediate flags for air drying and operated against rain and snow.
IMACHINERY AFTER IMPREGNATION
- If the material still needs to be followed, drilled, etc., the exposed wooden surfaces must be brushed with Koppers EndCoat (green or brown) in accordance with the instructions on the packaging.
- Parts processed, thickened, smoothed or planed along the fiber must be returned to the impregnation plant for re-impregnation.
- Under no circumstances should garden posts be sharpened after impregnation. Shortening of posts and columns should be avoided if possible, but in any case the repetition should be limited to the top of the post or column and the surfaces followed should be brushed with Kopper EndCoat (green or brown) according to the instructions on the package.
Celcurega GLUING IMPREGNATED WOOD
- Wood impregnated with Celcure can be glued after cleaning the surfaces with sediment and dirt with a wire brush or after high sanding.
- Resin adhesives recommended for dry interior use are resorcinol-formaldehyde adhesive, phenol-formaldehyde adhesive, casein adhesive, PVA or urea-formaldehyde-type adhesives.
- Resorcinol-formaldehyde glue or phenol-formaldehyde glue can be used for field work or in humid conditions.
- The instructions given by the adhesive manufacturer for moisture content and wood preparation must be followed. It is always advisable to consult the adhesive manufacturer regarding the use of a specific product.
IMPREGNATION OF PREVIOUSLY ADHESIVE ASSEMBLIES Celcurega
- The Celcure impregnated assemblies may first be glued with a suitable waterproof adhesive, such as a resorcinol-formaldehyde or phenol-formaldehyde line. The use of PVA, casein glue or urea-formaldehyde adhesive is not recommended.
- Before sending the kit for impregnation, all line connections must be fully cured as required by the adhesive manufacturer’s instructions (usually for several days).
- In the case of closed cavities, access openings must be drilled to allow the wood preservative solution to enter and drain.
- Plywood can be impregnated in the case of moisture-resistant adhesive plywood.
- Wood impregnated with Celcure does not need to be painted or stained to maintain its protective properties.
- Once the wood impregnated with Celcure has been re-dried to reduce the moisture content to 22%, conventional coatings can be used.
- If impregnated wood is to be stained, painted or varnished, the wood must be dry and its surface prepared in accordance with the manufacturer’s instructions.
- Impregnation is not a substitute for wood preparation, substrate coating or priming.
- If water-based coatings are used, discoloration may occur in exceptional circumstances. In this case, allow the coating material to dry completely. Then apply another coat of coating material, which could preferably be of high thickness and dry matter content.
METAL FASTENERS AND ACCESSORIES
Celcur impregnated wood is expected to have a sufficient service life, so it is worth using metal fasteners and phytodes with the same service life. Under normal conditions, galvanized material could be used. It should be noted that atmospheric pollution can have a greater detrimental effect on metals than on impregnated wood. By following the recommendations below, it is possible to minimize corrosion of metal fasteners and phytourite in contact with wood impregnated with Celcure.
- It is not necessary to attach the attachments to the wood during impregnation.
- Do not attach accessories to wood until 14 days after impregnation or until the moisture content of the wood has dropped below 20%.
- In addition to the above, wood intended for trusses must be allowed to dry to a moisture content of 22% or less after impregnation and before assembly; the wood must be kept in such conditions throughout the period of storage until delivery as recommended in BS5268 Part 3, paragraph 13.
- If the wood is expected to have a long service life and it is likely that the impregnated wood will get wet, use accessories made of stainless austenitic steel (except for grades with good cutability), copper or silicon bronze.
- If exposure to moisture is only occasionally expected, galvanized, solid galvanized or cadmium-plated accessories may be used. Thicker coated accessories generally have a longer service life.
- If the moisture content of the impregnated wood is expected to be less than 20%, accessories made of mild iron and aluminum may be used.
- The use of copper-containing aluminum alloys is not recommended.
- If aluminum sheet material is used, it must be separated from the wood by means of a bitumen board or a waterproof coating.
- Use 6063 (formerly HG9) aluminum nails when attaching Celcure impregnated wood slats.
This list, which may not be exhaustive, provides a number of examples of uses for wood products impregnated with Celcure wood preservative.
If you have the slightest doubt about a particular application, it is advisable to consult Hansacom or Koppers.
Foundations, basements and subfloors, thresholds, concrete frame constructions, booms, beams, roof timber, wooden parts for outdoor use, wooden beams, external wall cladding, shingles, wood for domestic use, buildings for commercial and public use.
GARDEN AND LANDSCAPE
Stunning systems, gazebos, gazebos, playground equipment, climbing frames, lawns, railings, picnic benches and tables, signs and rubbish bins.
AGRICULTURE AND HORTICULTURE
Fruit supports, hop poles, grape supports.
GUARDS, FENCES, ETC.
Natural round wood, machine-turned and edged fence posts, handrails, hanging details, gates and gate posts, railings, etc. for railways and roads, farms, gardens, safety railings.
Shipbuilding timber, floor and other timber for railway and road vehicles, container bases and linings, packing cases, cable drums and hatch covers (Australian quarantine regulations)