Until recently, one of the most common chemicals used in treating timber is Copper Chrome Arsenate (CCA).Due to its potentially hazardous levels of arsenic, legislation was enacted in early 2006 to forbid its use on such things as decking, garden furniture, picnic tables, play equipment, handrails and any exterior seating. Alternatives are:


ACQ (Alkaline Copper Quaternary), which is a water-based treatment that is resistant to termite and fungal attack and comes with treatment level H1 to H5.


LOSP (Light Organic Solvent Preservative), which has a 25-year guarantee against termite and fungal attack and is available in H1 to H3 treatment level.


TAN E, which is similar to ACQ, with treatment, levels also H1 to H5.

These treatments are effective at deterring attack from both fungal growth and termites.

Since CCA-treated timber has been off the market for quite some time, you probably won’t need to ask about it at reputable timber yards, but be cautions if recycling.


If you are using a non-treated timber outdoors, always select one that is classified as “natural durability class 1 or 2”.

Some natural durability class 1 timber are grey gum, red ironbark, tallowwood and turpentine, and some well-known durability class 2 timber are blackbutt, merbau, spotted gum, stringbark and Western red cedar.

2011年10月16日

豐勝高端防腐木—防腐木選購知識 BUYING TIMBER
防腐木,戶外家具的優質伴侶

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