A timber surround gives your outdoor pizza oven a polished, permanent look and can incorporate benchtop prep space, storage, and shelving. With basic carpentry skills and the right materials, this is a very achievable weekend project — but there are a few important rules around heat clearances and structural work you need to get right first.
Plan Before You Pick Up a Saw
Before cutting a single piece of timber, sketch out your design and take accurate measurements of your oven unit. Key things to establish:
- Overall dimensions — width, depth, and height of the finished surround
- Oven clearances — check your oven manufacturer's instructions for minimum distances between the oven body and any combustible material (timber). A common minimum is 200–300 mm clearance from the oven dome or flue to any timber framing, but always follow the manufacturer's specific guidance
- Base support — pizza ovens are very heavy (often 150–400 kg). The oven itself must sit on a non-combustible, load-bearing base such as a concrete slab, concrete block plinth, or steel frame. The timber surround wraps around this base; it does not support the oven's weight
- Location — keep the structure away from fences, overhanging trees, and the house. Check MBIE Building Performance guidance on outdoor structures and whether a building consent is required
Do You Need a Building Consent?
In many cases a simple freestanding outdoor surround under 10 m² of floor area may be exempt under Schedule 1 of the Building Act — but always confirm with your local council before starting. If the surround is attached to your house or includes roofing, consent is more likely to be required. Visit MBIE Building Performance for general guidance on Schedule 1 exemptions.
Choosing the Right Timber
Outdoor timber needs to handle NZ's variable weather — UV, rain, and humidity. Good choices include:
| Timber | Notes |
|---|---|
| H3.2 treated pine | Suitable for above-ground outdoor use, widely available |
| Kwila (Merbau) | Naturally durable, attractive finish, check sustainable sourcing |
| Macrocarpa | NZ-grown, naturally durable, great for rustic looks |
| Cedar | Lightweight, naturally rot-resistant, easy to work |
Avoid untreated pine outdoors — it will rot quickly. You can source treated framing timber and decking boards from Bunnings, Mitre 10, or PlaceMakers.
Step-by-Step Build Guide
1. Build or Confirm the Non-Combustible Base
Your oven sits on a concrete block plinth or poured concrete pad — not on timber. Ensure this base is level and fully cured before proceeding.
2. Frame the Surround
Using 90×45 mm H3.2 treated framing, build a simple stud-frame box around the base. Use galvanised framing nails or structural screws throughout — never plain steel fasteners outdoors as they will rust and stain. Ensure the frame is plumb and square before fixing.
3. Maintain Heat Clearances
This is critical for fire safety. Leave the manufacturer-specified air gap between the oven body and the timber frame on all sides. If in doubt, use a non-combustible lining (such as fibre cement sheet or compressed fibre board) on the interior faces of the timber frame closest to the oven. James Hardie fibre cement products are a good option — see James Hardie for suitable sheet products.
4. Clad the Exterior
Common cladding options include:
- Vertical or horizontal timber boards (shiplap, rusticated weatherboard)
- Fibre cement panels for a low-maintenance finish
- Tile or stone veneer over a fibre cement substrate for a Mediterranean look
Fix cladding with stainless steel or hot-dipped galvanised nails to prevent rust streaking.
5. Add a Benchtop
A concrete, tile, or stone benchtop on either side of the oven gives you prep space and is non-combustible near the heat source. Avoid timber benchtops immediately adjacent to the oven opening.
6. Finishing and Sealing
Once built, apply a quality exterior timber oil or paint to all exposed timber surfaces. Resene and Dulux both offer excellent exterior wood coatings suited to NZ conditions. Reapply as recommended by the manufacturer — typically every 1–3 years depending on exposure.
Safety Checklist
- ✅ Oven manufacturer's heat clearances observed
- ✅ Non-combustible lining used where timber is close to heat source
- ✅ Oven base is structural and non-combustible (not timber)
- ✅ Structure is stable and won't tip
- ✅ Flue/chimney exits well clear of any timber or roofing
- ✅ A fire extinguisher or garden hose is nearby when the oven is in use
For general outdoor fire safety guidance, refer to WorkSafe NZ.
When to Call a Professional
While the timber framing and cladding is DIY-friendly for a competent homeowner, there are situations where you should bring in a qualified tradesperson:
- Structural concerns — if the surround is large, attached to the house, or needs footings, engage a Licensed Building Practitioner (LBP)
- Gas connections — if your pizza oven runs on LPG or natural gas, any gas line work is restricted work and must be carried out by a licensed gasfitter registered with the Plumbers Gasfitters & Drainlayers Board (PGDB)
- Electrical connections — if you want lighting or power outlets in the surround, this is restricted electrical work and must be done by a registered electrician (see EWRB)
- Unsure about consents — a local LBP or your council can advise
You can find qualified local carpenters, builders, and other tradespeople on tradedirectory.co.nz.
