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Eight year final inspection of model windows exposed in the accelerated field simulator

Eight year final inspection of model windows exposed in the accelerated field simulator

Over eight years this research measured a window exposure trial designed to assess the efficacy of various wood preservatives and treatment schedules for ash eucalypts, in comparison to light organic solvent preservative (LOSP) treated-Shorea spp. (meranti). Other objectives were to compare the performance of the latest azole-containing LOSP formulation with an older TBTN-containing LOSP formulation, and to examine the protective effects provided by H1 lyctine boron treatment, remedial diffusible rods, and end-grain sealing.

The trial has demonstrated that azole LOSP will adequately protect eucalypt windows, especially when higher retentions are used. It has shown the importance of paint protection for the longer term performance of azole LOSP, and has also shown the superiority of azole over TBTN formulation. A surprising result was the good performance of a boron treatment aimed at the H1 market, suggesting that this treatment could also be used an alternative to LOSP treatment for painted windows. Diffusible preservative rods containing boron were also effective, and offer a relatively inexpensive method for window protection.

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