Decks are a common addition to Auckland houses and come in a variety of shapes and sizes
and construction methods and materials. They can range from a small entry deck to a most
elaborate feature deck, and with a little bit of thought and artistic flair, can be a great asset to
any house. This section concentrates on timber decks.
DO I NEED A PERMIT FOR MY DECK?
All decks 1 metre or more above ground level require a permit (building consent). A deck
less than 1 metre above ground level does not usually require a building consent (permit)
but may require resourse consent, and a deck extending less than two metres from the
face of a building does not require subfloor bracing.
Although a deck may not require building consent, it must still comply with the building
code. In other words, it must be built properly. If in doubt contact your local authority
DECKING MATERIALS EXPLAINED
The three most common used decking materials are:
Hardwood - Finished size is usually 90mm x 18mm. Kwila is a redish colour, but once
weathered changes to a silvery-grey colour. It is a very dense and durable timber. Kwila
can span 400mm, which means the joists (the timber the Kwila is nailed to) must not be
more than 450crs or 400mm between each joist.
PINE H3 90x35
Usual finished size is 90mmx35mm. This board, because if its thickness, can span up to
550mm. This means the joists (the timber the decking is nailed to) must not be more that
600crs or 550mm between each joist. Pine decking once weathered has a tendancy to
show little cracks or splits along the grain. This is a natural and accepted trait of pine. This
timber usually comes in two grades. Premium and merchant. Premium is clear with only
small tight knots, merchant is a mixture of grades and containes some big knots.
PINE H3 90x18
Same as above but can only span up to 350mm, which means the Joists (the timber the
decking is nailed to) must not have more than 400mm Crs or 350mm space between each