Chemicals should not be brushed on. The timber should be put into a treatment vessel and through various processes; the chemicals are deeply impregnated into the timber, thus obtaining the correct penetration depth.
The main chemicals used in this country are CCA (Copper Chrome Arsenate) and Creosote. CCA gives the timber a greenish look whilst Creosote leaves the timber or pole black. Other chemicals used are Boron and TBTOL (Tributyltinoxide Lindane). PCP has been removed from the market place because of its damaging environmental properties.
The purpose for which the timber is being purchased determines the treatment required. A piece of timber to be used in the roof need not be treated with the same amount of chemical as a piece of
timber being used for a jetty. (The treatment changes with different applications).
The chemicals need not penetrate to the same depth, nor need the solution be the same strength. These two factors are called penetration and retention levels respectively.
As with most industrial grown timber, South African timber is not very durable and is subject to attack from fungus and termites. This is why it is necessary to 'treat' timber with wood preserving chemicals if you require confidence in its durability. Taking this a step further, SAWPA together with the SABS and representatives from the timber industry established different Hazard Classifications.
certification mark of the S.A.B.S.
- All timber is treated to S.A.B.S specifications and has the
timber, poles, thatching laths, slats and droppers.
- VIMAR TIMBERS are treaters and suppliers of CCA treated
Association, SAWPA.
- We are a member of the South African Wood Preservers
VIMAR TIMBERS (PTY)Ltd was established in 2001.
VIMAR TIMBERS (PTY)Ltd was established in 2001. |