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South African Wood Preservers Association (SAWPA)
South African Wood Preservers Association (SAWPA) logo
SAWPA is an industry association which promotes the use of treated timber and treated timber products.

Understanding Timber Preservation

A general introduction to the subject of wood technology and wood preservation. Knowledge of these fundamental factors can be of considerable assistance in gaining an appreciation of the value and importance of timber preservation and the selection of the most appropriate method of treatment. The growth of the Wood Preservation Industry has been one of the most important technical developments within the forest industry. The wide acceptance of preservation as an integral part of wood processing and utilisation has been a significant contribution to the use of what is the only structural raw material having a renewable and sustainable source of supply. There are timber structures still in existence after hundreds of years of service but there are fence posts which have rotted after only 18 months service.

This is due not only to a great variability in wood properties and our environment but also to the way in which the products are used. Wood suffers minor and gradual physical and chemical changes as a result of age. It is an organic material which can support the life of other organisms if the environment is suited to their growth and this, under certain conditions, leads to rapid breakdown of the wood. What are the circumstances in which wood is likely to be attacked by destructive agents and what measures should be taken to defeat them?

Most people can identify wood when they see it and can give names to the more familiar timbers in general use. However, much is taken for granted and relatively few may know timber in terms of a growing form of plant life or understand what structural variations produce the features characterising species which enable us to name them. The differences which exist between species are sufficient for us to realise that timber is a substance of greater diversity and character than materials such as steel and concrete. To enable the best use to be made of wood and to ensure the correct selection of the type best suited to any application, it is necessary to understand something of its structural form and characteristics and how these vary from species to species.

Bitumproof SA
Bitumproof SA logo
For the last 70 years Pazkar has developed and manufactured sophisticated sealing and insulation materials for the construction and infrastructure industries, offering dozens of types: sealants membranes, compounds and coatings.Pazkar allows professionals to provide outstanding sealing properties and protect buildings infrastructure from the forces of nature. Pazkar’s research and development is the heart of the company’s operation, where creativity and originality meet the most advanced technology in order to develop reliable professional and creative insulation solutions for customer’s needs.“Bitumproof SA” is the sole distributor of Pazkar products here in South Africa and surrounding countries.  With years of experience and a formidable knowledge of waterproofing solutions, Bitumproof SA offers professional consultations & free quotations on all residential, commercial and industrial properties.Bitumproof SA strives to provide green and environmentally friendly solutions in everything that we do. Our products are all water based, non-toxic and odourless, minimising any negative impact on the environment.These remarkable products have been successfully applied to 100’s of projects in South Africa such as the Gautrain, Bombela, CJV, Grinaker LTA, Eskom, Sasol and throughout the world, earning our guarantee 100% waterproof.
Clearshield SA (Pty) Ltd
Clearshield SA (Pty) Ltd The supply of products and training to a network of applicators and end users. Main products are Clearshield and Ritecoat "Non-Stick" surface technology products for glass and various metals which are designed to significantly reduce contamination, discolouration and subsequent cleaning and maintenance.
Comprifix South Africa cc
Comprifix South Africa cc Manufacturer and convertor of various foam sealing products, specialising in joint formers and sealers, pipe and duct insulation, backing cords and aluminium expansion joints, also manufacture various insulation, acoustic and sealing foams.
Four Seasons Aluminium Products
Four Seasons Aluminium Products Four Seasons is a Cape Town based company manufacturing curved and flat glass and aluminium conservatory systems, as well as doors, windows, balustrades and rooflights. Products are marketed and installed by authorised dealers in all major centres.