Yes, as a homeowner in New Zealand you can legally use a mobile scaffold tower to paint your own soffits — but only if you set it up correctly, stay within safe working heights, and follow WorkSafe NZ guidelines. Get it wrong and you're risking a serious fall, which is one of the leading causes of injury in DIY projects. Here's what you need to know before you climb.
What Is a Mobile Scaffold Tower?
A mobile scaffold tower (sometimes called a mobile aluminium tower or portable scaffold) is a freestanding, wheeled frame system that gives you a stable elevated platform to work from. They're widely available for hire from tool hire shops and larger hardware retailers like Bunnings and Mitre 10. They're far safer than a ladder for overhead work like soffit painting because you have a proper platform underfoot and can move freely without constantly repositioning.
NZ Legal and Safety Framework
In New Zealand, working at height is governed by the Health and Safety at Work Act 2015 and associated regulations. WorkSafe NZ sets out the duty to manage fall risks for anyone working at height — including homeowners doing DIY. While homeowners are not subject to the same obligations as employers, you still have a duty to protect yourself and anyone else on or near the site.
Key points:
- Mobile scaffold towers are generally suitable for working heights up to around 5 metres (platform height up to roughly 3.5 m) for DIY use. Above this, the risk increases significantly and professional scaffolding is strongly recommended.
- The tower must be erected and used strictly in accordance with the manufacturer's instructions.
- Always check the Safe Working Load (SWL) — check the specific SWL stated on the tower or in the manufacturer's documentation, as this varies by model — and never exceed it.
- Towers must only be used on firm, level ground. Soft ground, slopes, or uneven surfaces are not safe.
Setting Up Your Mobile Scaffold Tower Safely
Before You Start
- Inspect every component before assembly. Look for bent frames, cracked welds, missing pins, or damaged boards.
- Read the manufacturer's assembly guide fully — don't skip steps.
- Check the base plate adjusters are wound down evenly so the tower is level.
During Assembly
- Lock all castor wheels before climbing. This is non-negotiable.
- Install outriggers (stabilisers) if the tower height exceeds the manufacturer's recommended height-to-base ratio — typically 3:1 for outdoor use.
- Fit guardrails and toe boards on all open sides of the working platform.
- Never climb the outside of the tower frames — use the internal ladder or stairway access.
While Working
- Keep your body within the guardrails at all times. Don't lean out over the edge.
- Never move the tower while anyone is on it — always climb down first.
- Keep the platform clear of excess paint tins, tools, and trip hazards.
- Wear non-slip footwear.
- Work with a buddy where possible — someone on the ground to watch for hazards and assist if needed.
Painting Soffits: Practical Tips
Soffits are the underside of your roof overhang and are typically made from timber, fibre cement (such as James Hardie products), or plywood. Before painting:
- Clean the surface thoroughly — remove dirt, mould, and flaking paint. A sugar soap wash works well.
- Spot-prime any bare timber or repaired areas before applying your topcoat.
- Use a quality exterior paint rated for soffits and trim. Resene, Dulux, and Wattyl all offer suitable exterior trim and soffit paints — check their websites or ask in-store for the right product for your substrate.
- A long-handled roller or brush can reduce how much you need to reach overhead, saving your arms and reducing fatigue.
- Paint on a calm, dry day — wind can blow paint onto windows and wet paint picks up dust quickly.
Height Limits and When a Tower Isn't Enough
For single-storey homes, a mobile scaffold tower is usually perfectly adequate for soffit work. For two-storey homes or high-pitched rooflines, the working height may exceed what a standard hire tower can safely provide. In these cases, you should seriously consider engaging a licensed scaffolder. Attempting to extend a tower beyond its rated height by stacking extra frames or using makeshift platforms is extremely dangerous and must never be done.
Do You Need a Building Consent?
Painting your soffits is maintenance work and does not require a building consent. However, if you're replacing soffit boards as part of the job, check with your local council — some repair work may fall under Schedule 1 exemptions of the Building Act, but it's always best to confirm directly rather than assume.
When to Call a Professional
Consider hiring a qualified scaffolder or painter if:
- Your home is two storeys or higher
- The ground around your home is uneven, sloped, or soft
- You're not confident assembling or working on a scaffold tower
- The job is large and would take multiple days at height
- You have any health conditions affecting your balance or mobility
A professional scaffolder will erect a safe, compliant system quickly and can often leave it in place for a painter to use. You can find qualified local scaffolders and painters on tradedirectory.co.nz.
