Truss Facts & Useful Information

Timber Preservation & Usage Information

Here at Leach Trusses, the timber used for our roof trusses undergoes a preservation process to enhance its resistance against wood-destroying fungi and insects. Essentially, this treatment elevates the durability of timber to a level suitable for its intended purpose. However, it's important to note that this treatment does not shield timber from the effects of weathering. For timber used outdoors, whether treated or untreated, it is advisable to apply a protective coating or oil to safeguard it from weather-related damage.

Varieties of Treatments

There exists a wide array of timber treatments available, each tailored to address specific needs. Some treatments focus on protecting timber from borers and termites, while others offer defence against insects, borers and decay. The choice of preservative depends on the level of protection required, categorised into six Hazard Levels, determined by the exposure's level of risk.

Hazard Levels & Preservatives

Distinct preservatives are employed for different protection demands within the six Hazard Levels. These levels are established based on the degree of exposure risk. Notably, when treating hardwoods to reach Hazard Level H1, the preservative fully penetrates the sapwood, as there's no need to protect the heartwood against lyctid attacks. For Hazard Levels H2 through H6, preservative penetration increases from the surface, with the amount of preservative in the treated timber envelope escalating as the exposure risk level rises.

Keen to know more? Don't hesitate to reach out to our team today on (07) 5494 1077. We operate throughout the Sunshine Coast and surrounds, including in Gympie, Noosa, Maroochydore, Caloundra, Caboolture, Morayfield, North Lakes and Brisbane.