Timber Durability
Specifying durable timber is paramount in harsh external environments - all timber must be class 1 or 2 durability. These classes are readily available and have a proven performance record. Species of this durability include Blackbutt, Cypress, Ironbark (grey & red), Mahogany (white), Spotted Gum and Tallowwood. Specifying a single species may increase supply costs or time, so it is generally preferable to include a suitable substitution species. In many cases, given a period of natural weathering, variations in species may not be recognisable. Further details can be obtained in the Hardwood & Cypress Species Guide referenced at the end of this document.