High Pressure Treated Timber User Guide
Contents
1. feed or beehives e Do not use preserved wood for mulch e Only preserved wood that is visibly clean and free of surface residue should be used e Do not use preserved wood in direct contact with aluminium e If wood is to be used in an interior application and becomes wet during construction it should be allowed to dry before being covered or enclosed e Disposal Recommendations Preserved wood may be disposed of in landfills or burned in commercial or industrial incinerators or boilers in accordance with National and Regional regulations e If you desire to apply a paint stain clear water repellent or other finish to your preservative treated wood we recommend following the manufacturers instructions and label of the finishing product Before you start we recommend you apply the finishing product to a small test area before finishing the entire project to ensure it provides the intended result before proceeding e Certain metal products including fastener hardware and flashing may corrode when in direct contact with wood treated with copper based preservatives lo prevent premature corrosion and failure it is important to follow the recommendations of the manufacturer for all metal products e Mould growth can and does occur on the surface of many products including treated or untreated wood during prolonged surface exposure to excessive moisture conditions lo remove mould from treated wood surfaces wood should be allowed to dry Typi2. to dry sufficiently before it is despatched In general a period of not less than 24 hours should elapse This is typically a minimum requirement and timber packs should be touch dry with no free fluid in the packs at all It should be remembered that timber will also swell to some extent during treatment and should be allowed to dry at a natural rate until tt has reached its pre treatment moisture content Re working of treated timber Occasionally it may be necessary to re work treated timber Every effort must be made to avoid this but if it must be done the following should be observed Any surface exposed by drilling or cutting must be coated with a cut end preservative Failure to coat will undermine the effectiveness of the preservative It is recommended that the coated ends are not put in the ground or in direct contact with water Rip sawing thicknessing and planing are not permitted unless the timber is subsequently processed to the original specification 2 Never place a re treated end in ground contact 4 Where any working is carried out read and follow the health and safety instructions in the Health and Safety section of this guide Gluing Osmose Naturewood preserved wood can be glued with most commonly used adhesives once dry Always follow the adhesive manufacturers recommendations Which metal fixings can use Certain metal products including fasteners hardware and flashing may corrode when in direct contact wi
3. High Pressure Treated Timber TREATMENTS User Guide Important information for users of Osmose Naturewood High Pressure treated timber What is Osmose Naturewood Osmose Naturewood preserved wood is the name given to timber that has been preserved with an Osmose preservative system known as Celcure AC 500 which is based on copper and an organic co biocide Alkaline Copper Quaternary Alkaline Copper Quaternary systems have provided proven performance for over a decade in locations throughout Europe North America Australia and Japan Osmose Naturewood preserved wood can be used for fencing timber decking landscaping timbers and construction timbers Osmose Naturewood can be used to treat all timber in use classes 4 Information on the Use Class system is available from PTG Treatments or from BS EN 335 1 Osmose Naturewood appears in the Wood Protection Association Manual as compliant with EN 599 expectations What length of service life can be expected Service life of the treated timber depends upon the species end use and application rates In general it can be expected that internal timbers used in Use Class or 2 will last in excess of 60 years Those timbers exposed to weathering but installed above ground contact will achieve service lives of between 5 30 years Timbers serving in ground contact such as fence posts can achieve a service life of around 5 years However care should be taken to choose the correct species for th
4. cally mild soap and water can be used to remove surface mould e For more information visit www osmose europe com T 01757 249908 E neilryan ptgtreatments co uk Head Office T 01777 709855 E steve adams ptgtreatments co uk Sales amp Operations T 01204 469869 E accounts ptgtreatments co uk Accounts T 01236 720992 E cumbernauld ptgtreatments co uk Cumbernauld Lanarkshire T 01482 329114 E hull ptgtreatments co uk Hull East Yorkshire T 01375 858700 E tilbury ptgtreatments co uk Tilbury Essex T 01738 635521 E perth ptgtreatments co uk Perth Tayside T 01273 422296 E shoreham ptgtreatments co uk Brighton East Sussex www ptgtreatments co uk
5. e end use and to specify the correct level of treatment How do specify treatment with Osmose Naturewood Firstly identify the component end use 2 Identify the Use Class pertaining to this end use USE CLASS TABLE e g fence post Use Class 4 U S E CLASS TAB LE 3 Identify any special service life considerations do they differ from those eb E p Above ground covered described above If so consult PTG Treatments for specialist advice Permanently dig insect rick J Above ground covered Occasional risk of wetting 4 Identify and report the species of the timber to be treated as this has a considerable bearing on suitability for certain treatment process or end uses f Also identify and report the moisture content of the timber 5 PIG Treatments recommends a form of words such as Timber to be treated to a 5 year service life in Use Class 4 conditions The species is pine and the moisture content is lower than 28 6 Specify whether a Treatment Certificate is required Biocidal Product Regulation EU 528 2012 Article 58 Information Celcure AC 500 preserved wood is a treated article which incorporates biocidal products Wood correctly preserved with Celcure AC 500 is protected against wood destroying insects and wood rotting fungi Contains Basic copper carbonate Copper Il carbonate Copper II hydroxide 1 1 Boric acid Benzalkonium chloride Wear gloves when handling freshly trea
6. ill expose unpreserved wood If cutting cannot be avoided then precautions should be taken to keep airborne dust levels below the Workplace Exposure Limits for wood dust In particular avoid inhalation of dust when using high speed cross cut saws or mechanical sanders Any surface exposed by drilling or cutting must be retreated with a cut end preservative Failure to do this will reduce the effectiveness of the preservative It Is recommended that the re preserved ends are not put in the ground or in direct contact with water Rip sawing thicknessing and planing are not permitted unless the timber is subsequently re preserved to the original specification Important Information e Do not burn preserved wood e Wear a dust mask and goggles when cutting or sanding wood e Wear gloves when working with wood e Some preservative may migrate from the treated wood into soil water or may dislodge from the treated wood surface upon contact with skin Wash exposed skin areas thoroughly e All sawdust and construction debris should be cleaned up and disposed of after construction e Wash work clothes separately from other household clothing before re use e Preserved wood should not be used where it may come into direct contact or indirect contact with drinking water except for uses involving incidental contact such as fresh water docks and bridges e Do not use preserved wood under circumstances where the preservative may become a component of food animal
7. ted wood Avoid breathing dust when cutting treated or untreated wood Dispose of off cuts responsibly do not burn www ptgtreatments co uk Preparation of timber prior to treatment Timber packs must be of the correct moisture content in order to allow sufficient penetration into the wood fibre Below 28 moisture content is the recommendation 2 Timber must be debarked and as far as possible free from sawdust and debris Plastic wrapping should be removed Packs that have been very tightly banded should have the bands cut prior to treatment to allow free passage of the fluid into the packs 3 All possible working of the timber should be performed prior to treatment 4 If timber shows signs of incipient attack from fungus or insects it should not be treated 5 A small amount of blue stain is not critical 6 Where possible space the packs with laths in order to allow free passage of the fluid and to aid the drying process afterwards The Treatment Process PTT TTT BUT w al i i i i l BINNA The timber is A vacuum pulls the Osmose Naturewood The vessel is pressurised The solution is removed The timber has now been transferred into the air out of the vessel solution fills the vessel forcing the solution into and final vacuum is treated with Osmose treatment vessel the timber applied removing excess Naturewood solution Collection of treated timber Treated timber should always be allowed
8. th wood treated with copper based preservatives lo prevent premature corrosion and failure it is important to follow the recommendations of the manufacturer for all metal products Do not use preserved wood in direct contact with aluminium www ptgtreatments co uk Appearance of Osmose Naturewood Osmose Naturewood products will initially have a green appearance that highlights the natural variations of the wood this will weather to an attractive natural honey brown colour before finally fading to a driftwood grey after long term exposure to the sun Osmose Naturewood products can be stained to match any outdoor colour scheme Always follow manufacturer s recommendations Osmose Naturewood treated timber is also available with a brown colour As with the natural green colouration of treated timber the brown colour will fade after a period of time The rate of fading will depend on the end use application and environmental conditions Can paint and stain this timber Yes Osmose Naturewood treated timber can be painted using most standard wood coating systems It is important that the timber should be dried sufficiently following treatment In general that means that timber should be less than 20 moisture content at the time of painting Both water based and oil based systems are compatible but advice should be sought from the coatings supplier before application Cutting Preserved wood should not be cut or otherwise reworked as this w
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