We have a number of species available including Accoya wood, Jarrah, Kwila, Saligna and Vitex. While Kwila is the most popular, closely followed by Vitex, there are times where these are not suitable. The table below give a comparison of different benefits of our five major species.
We can also machine to your custom profile, but you'll need to contact us for the details.
The Department of Building and Housing advises that decks not on the route to the main entrance do not require a slip resistance of 0.4 to meet the Building Code clause D1 (Access Routes).
However any exposed timber decking on the route to the main entrance will probably need to have some form increased slip resistance, this is most easily achieved by either fixing a weatherproof matting to the timber or coating the timber with a sand/grit impregnated coating.
Refer to their website for more information: http://www.dbh.govt.nz/codewords-19-article-1
Timbers commonly used in New Zealand vary enormously in term of stability (how much they shrink and swell). Three factors need to be considered in determining the gap between boards:
- Moisture Content: Decking is supplied in a range of moisture contents to the New Zealand market, from near green to kiln dried. Generally speaking, a kiln dried will swell more than a green board.
- Species: Kwila is a very stable species which does not shrink and swell a lot, however other species like Jarrah, Saligna, Greenheart, and others all shrink and swell a lot.
- Size (width of board): Wider boards will shrink/swell more than narrower boards so require a larger expansion gap.
This table gives recommended expansion gaps for Timber Decking: