Knowing which CCA treatment class to use for your application?

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Here is how to know which CCA treatment class is perfect for your project?

South African plantations grow pine and eucalyptus, and they are not durable, therefore they are subject to attack from fungus and termite. Consequently, it is necessary to ‘treat’ or “protect” the timber through a process called wood preserving. We preserve wood through pressure treatment with CCA treatment. There are various classes and each class has a specific application. The purpose of the application will determine the treatment required to ensure maximum performance. The South African Wood Preservation Association (SAWPA), together with the SABS established hazard classification for the treatment of wood. These hazard classification treatments change according to the application of the wood. Therefore the chemicals need not penetrate to the same depth, nor are the solutions the same. With this in mind, these two factors are penetration and retention levels respectively.

In South Africa, we have 6 hazards CCA treatment class levels or treatment.

END-USE APPLICATION (typical examples) Internal External Above Ground In-Ground Contact Wet Soils/In Fresh Water In Sea Water
BeamsRoof Trusses Structural
timber ceiling Boards Flooring
SkirtingWindow framesPlywood

Fencing bearers and slats

Outdoor decking and beams

Garden furniture

Laminated Beams


Log Homes
Fascia boards

Agricultural posts

Landscaping structures

Playground structures

Flower boxes
Garden Edging
Transmission Poles

Retaining Walls
Flood Gates
Retaining Walls

CCA is an industrial wood preservative, developed in 1933, it is widely used in South Africa since the ’70s. Applying the CCA treatment to timber enhances the durability by preserving it against biological deterioration such as insect attacks and fungal decay. CCA may only be applied by an industrial high-pressure process. Thus the familiar term “pressure treated wood”.


Freshly treated CCA timber is identifiable by its yellow/greenish to green color. This fades over time, leaving a weathered silver-grey if exposed to the elements and not maintained with a wood finishing protective product i.e. a suitable exterior sealer. Because of the different classes, it is important to use the treated timber in accordance with the required hazard classification.

Treatment at Sabie Poles:

Maximum penetration of CCA Treated Timber is ensured through our pressure treatment plant at Sabie Poles The three treatment classes used for preservation is H3, H4, and H5.

  • Our H3 CCA-treated poles are treated to be protected against insects, termites, and decay. Therefore poles are mainly used outside, above ground. They are subject to periodic wetting and leaching (ex. Cladding, decking, stairs, balustrades, log homes, etc.)
  • Our H4 CCA-treated poles are treated to be protected against insects, termites, and severe decay. Therefore poles are mainly used in or on the ground. They are also subject to severe wetting and leaching. (ex. Fencing and structural posts, landscaping, stakes, pergolas, etc.)
  • Our H5 CCA treated poles are treated to be protected against heavy wet soil or freshwater. (ex. Piling, substructure for walkways & jetties, etc.)

CCA-Poles-Depo-cca treatment class h4,h5The CCA chemistry and its use in wood preservation are designed to fix the preservative within the wood. For this reason, the treated wood product can perform as intended. But it still needs to be toxic for the agents which would otherwise attach the timber i.e. fungi and insects. The CCA treatment process of timber is environmentally friendly. As a result, you are not only building projects that last but you also invest in the conservation of our forest resources. These treated timbers will last much longer than it takes replacement trees to grow and be converted into wooden products. Thus the life of the wood is extended and requires fewer trees to be cut. At Sabie Poles, we source only the finest quality poles and timber for our clients. As owners of our own forest, all our treated timber products come with a 20-year guarantee. We are able to provide most sizes and types used in the construction of your home.

The treated timber products we supply are; See Our Construction Poles

SA Pine CCA treated Boards

All timber used in the structural application should be structural South African pine compliant with the requirements of SANS and bears the full standardization mark. Furthermore the same applies to all timber used for roof battens.

We supply a full range of SANS graded and treated structural timber.
Strength properties and allowable design stresses define various grades.

We supply S5/S7 and UTP grade, as well as furniture grade and mill run material.

They are either an H3 Treatment (above ground use), H4 (Inground contact), or H5 (protected against heavy wet soil or freshwater.)

  • 38mm x 38/50/76/114/152/228mm in lengths starting at 0.9m, with increments of 300mm up to 6.6m.
  • 25mm x 76/114/152mm in lengths starting at 0.9m, with an increment of 300mm up to 6.6

Always order according to specific dimensions. Timber should not be re-sawn into smaller cross-sectional sizes on site.
Consequently, re-sawing of this timber will cause the grade, strength, and dimensional tolerance to change, causing the timber to lose its SANS approved status.

When storing the structural timber onsite, stacking should be on level ground on bearers and also adequately protected against the weather by being covered with waterproof material. Has to be circulation of air through the timber stack. The strapping around bundles of battens should not be removed until the battens are to be fixed, subsequently, this will prevent excessive warping.


Cladding is the application of one material over another to provide a skin or layer. In construction, the cladding is used to provide a degree of thermal insulation and weather resistance, and to improve the appearance of buildings.”  (Source:

Using treated timber for exterior and interior cladding for timber frame houses, log cabins, wendy houses, dog kennels, etc.

Hardwood cladding is a solution for any wall, offering not just the cladding but all the detailed trims required to finish off the project and ensure a watertight result. Hardwood is a natural and renewable resource. Timber provides an environmental advantage over common building materials. However, it’s performance is within the limits of its natural properties. It is critical to consider the characteristics and properties of the timber to determine how it will respond to the environment it is placed in.
Consider everything prior to building. Bearing in mind the accessibility, positioning and finish. The expected outcome will determine the level of maintenance required. Therefore we always advise our customers to treat their cladding as this extends the life of the wood. The most common CCA treatment class for cladding would be H3.

Response to the environment it is in will be determined y the characteristics and properties of that specific timber. Consequently, it is important to conder these factors.


Timber flooring and the decking is a very popular option that provides you with durable, homely, and warm aesthetics that is difficult to rival! Consequently, it is incredibly important to not compromise on the expertise and craftsmanship on which such a project relies. Installing custom-built decks or wood floors requires quality timber. There is a wide range of products on the market for creating your dream deck, therefore it is crucial to ensure that you purchase the correct sizes, lengths, and SABS standard timber for your project.

Our highly skilled team of experts at Sabie Poles is here to assist in all your needs. get in touch.

  1. Interior

Applications include wooden flooring, ceiling, cornice, and skirtings.

These applications are stylish, practical, and versatile – depending on the type, style, and design. Treated timber will always suit any decorative styles within a home, ranging from contemporary to rustic. Treated timber ooze a sense of uniqueness and individuality that adds value to any home. With proper care, wooden floors, ceilings, cornice and skirting’s lasts a lifetime, as it is durable, low in maintenance, and environmentally friendly.

At Sabie Poles, we supply you with the best quality treated timber for all your interior needs. Applications for interior timber use require the CCA Treatment class of H2. All our interior timbers adhere to SABS standards.

  1. Exterior

CCA-Decking-CCA treatment class H3

Applications for using treated timber all around the exterior of your home are available. Therefore you enhance any home, garden, or commercial property through decking because it provides durable, low maintenance, and environmentally friendly options. Decking is a versatile option to add to one’s lifestyle. Any shape, size, color, and style is possible. Therefore build a deck for entertainment and relaxation, but it is still important to choose the best possible product, for this reason, we have a CCA treatment class of H3, it is much more durable and can resist the most direct exposure to natural elements. Hence this is the most used product for projects and is the most sought after. Get Exterior decking for a great price here.

In addition, our price list can be downloaded from our homepage, it includes all the pricing and detailed sizes of all our treated timber products.

We pride ourselves on the fact that we have years of experience in the industry. Thus contacting us means you will get the best advice, service, and products in the industry. We service clients all over South Africa with pressure-treated wood. Therefore, if you require any help, whether it is with building plans, knowing which class of timber to use, or simply asking more regarding the treatment process, we encourage you to contact us!


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