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Termite shields, an early physical barrier, are sheet metal fabrications used for decades in light frame construction. Termite shields are often applied underneath wood sill plates. They are designed to force termites to build their mud tubes outside of the structure, where they become visible to a trained pest management professional.
Apart from structural wood preservation measures, there are a number of different chemical preservatives and processes (also known as timber treatment, lumber treatment or pressure treatment) that can extend the life of wood, timber, and their associated products, including engineered wood. These generally increase the durability and resistance ...
Chlordane, or chlordan, is an organochlorine compound that was used as a pesticide.It is a white solid. In the United States, chlordane was used for termite-treatment of approximately 30 million homes until it was banned in 1988. [4]
The copper acts primarily to protect the wood against decay, fungi, and bacteria, while the arsenic is the main insecticidal component, providing protection from wood-attacking insects including termites and marine borers. It also improves the weather resistance of treated timber and may assist paint adherence in the long term.
In 1933, Kamesam added Copper sulphate as an anti-fungal to the formula of Wolman Salts which worked against termite damage. In addition Kamesam introduced the use of chromium to bind the two salts to the fibres of wood. He received an Indian patent in 1933, a British patent in 1934 and a US patent in 1938. [5] [6] [7] [8]
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