Even if you don’t need a building consent all works must be completed in accordance with the Building Code. It is important that you understand the Christchurch deck building requirements before you begin your projects. Maximum 36 "oc solid stringer spacing for 2" thick treads; Maximum 18 "oc notched stringer spacing for 2" or 5/4 "thick treads; Maximum nosing of 0.75 "to 1.25" - maximum nosing radius of 9/16 "Open risers: maximum opening of 4" Closed risers: minimal nominal 1" thick riser material Certain types of timber construction are of concern. The second thing to be aware of is the Building Act (NZS 3604:2011) – decks that have a finished height above 1.5 metres from the ground require a consent. Are any galvanised steel connectors corroding? It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. This guide will take you through the process step by step, so you can get the job done right. See everything in 'Building Code compliance'. Unless the deck or balcony has been correctly designed, constructed and, most importantly, properly maintained, water may leak in behind the cladding or through the waterproof surfacing and create conditions that encourage timber to decay and fasteners to corrode. Before checking whether you need a consent for your deck, you need to know: There will be an explanation on how to calculate these factors in the online consent tool. See our HOW TO DESIGN A DECK Easy As guide & video, this will take you through the process step by step. Deck Joist Cantilever Rules and Limits The distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists, the wood … Before constructing your deck, balcony or veranda, check out the available information about building and maintaining decks online at If your deck is below 1.5 metres then it doesn’t require consent, however it must still meet other building requirements, primarily the durability and structural requirements. Building code requirements for exterior decking railings and stairways are especially stringent because decks fall into the category of critical health and safety matters. Water must be able to drain between the planks, so they need to be installed with a gap between them. Building code. If you are involved in a building project, it’s important you know who is responsible for each aspect. Water must be able to drain between the planks, so they need to be installed with a gap between them. BRANZ search and locate tool The BRANZ digital helpline, a useful directory of building and construction information in New Zealand. Building a deck is the first step in creating a fantastic outdoor space for your home, find out what else you can do to create the perfect entertaining area. Understand project stages, from scoping and design to consents, construction and completion. If your deck is more than 1m high, it must have a handrail. Unlike wood, you won’t be burdened by cracks and splinters. The Building Code sets out the minimum levels of performance that a building must meet or exceed. In some situations, a freestanding deck or platform may be a simpler solution than an attached deck. Subject to section 42A of the Building Act, Schedule 1 exempts the following from a building consent: Building work in connection with a deck, platform, bridge, boardwalk, or the like from which it is not possible to fall more than 1.5 metres even if it collapses. 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