CCA Treatment:
CCA (Copper, Chrome &Arsenic) is an industrial wood preservative. The chemical mixture is injected into the wood under pressure so that the wood is saturated with the chemicals. Timber is treated with CCA to prolong its life. CCA is used for the control and prevention of damage to timber and timber structures by insects, wood rot, wood fungus and general timber decay. Timber Solutions can treat timber to H2, H3, H4 or H5 hazard class. H2: Low Hazard- Inside above the ground, protected from wetting and leaching (Roof trusses, framing, laminated beams & flooring etc). H3: Moderate Hazard- Outside above the ground, subject to periodic wetting and leaching (Cladding, decking, stairs and balustrades etc). 
 
H4 GROUND CONTACT (HIGH HAZARD)
This level of treatment helps prevent agricultural posts and landscaping structures from rotting and termite attack. Also recommended for treatment in this hazard class are playground structures, fencing, pergolas, carports, flower boxes, decking, bridges and stakes, as well as electrical, distribution, telephone and lighting poles.
 
H5 FRESHWATER AND HEAVY WET SOILS (HIGH HAZARD)
Timber which falls into this category, is timber exposed to continual wetting or where the timber is planted in wet soil. Timber which will fall into this category could be jetties, drains, walkways, retaining walls and slipways. Agricultural poles exposed to frequent irrigation and fertilisers are also included here as well as poles used as piling and foundation poles for permanent structures, such as timber homes.