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Q1. What timber do I use to build a deck or pergola?
A. The selection of timber to be used for an outdoor situation such as a deck or pergola, you must take into consideration the exposure to the natural elements. Therefore, selection of species that are durable for the application as well as being easy to work with, should be the basis of your criteria. For example;
Posts in ground should be of a Durability Class 1 species or preservative treated softwood to Hazard level 5 (H5)
Above ground posts should be of a Durability Class 2 or preservative treated softwood to a H3 level.
Other structural elements such as decking materials, joists etc. should be of a Durability Class 1 or 2, or preseravtive treated softwood to H3.
If you are selecting hardwood for decking purposes it is recommended that it be a seasonsed (usually kiln-dried) product of a durability Class 1 - 2.
For more information download technical data sheet on Decks
* For information on Durability Classes and Hazard Levels ask your local timber supplier.