Setting up edge protection on a low-pitched roof is not a simple weekend project — it is a legal safety requirement under New Zealand law whenever you are working at height. While some preparatory steps are within a capable homeowner's reach, the actual installation of compliant edge protection is tightly regulated, and getting it wrong can be fatal. Here's what you need to know before you climb up there.
Why Edge Protection Is Required by Law
In New Zealand, working at height is one of the leading causes of serious injury and death in and around the home. WorkSafe NZ requires that any work on a roof where a person could fall 3 metres or more must have fall prevention measures in place. On a low-pitched roof (generally considered less than 25°), the risk is actually higher than on a steep roof because you can slide off gradually without realising it — there's less friction to slow you down.
The relevant standard is NZS 3604 for timber-framed buildings, and the Health and Safety at Work Act 2015 (HSWA) applies to anyone carrying out work — including homeowners doing their own maintenance.
What Counts as Edge Protection?
Compliant edge protection for a low-pitched roof typically consists of:
- Guardrails at least 900 mm above the working surface (or roof edge)
- Mid-rails to prevent someone slipping under the top rail
- Toeboards (kick boards) at least 100 mm high to stop tools and materials rolling off
- Scaffold standards (uprights) and ledgers to support the rail system, usually erected at eaves level
The system must be capable of withstanding the forces of a person falling against it. This is not something you can replicate with a few bits of timber nailed together.
Can a Homeowner Install Edge Protection Themselves?
This is where many people get caught out. Scaffolding and edge protection systems are not restricted work in the same legal sense as electrical or plumbing tasks — there is no specific licence required just to erect scaffolding. However:
- The system must still comply with WorkSafe NZ guidelines and relevant standards
- If you hire or borrow scaffold equipment, you are responsible for ensuring it is erected correctly
- Most hire companies will not release scaffold equipment without confirmation it will be erected by a competent person
- If something goes wrong and your edge protection fails, you carry full liability
In practice, for most homeowners, hiring a qualified scaffolder is the safest and most practical option. A competent scaffolder will erect a compliant system quickly, and you can then carry out your roofing work safely within it.
What a Homeowner Can Reasonably Do
If you are determined to manage some of this yourself, here are the steps you can take before a scaffolder arrives — or for very minor, low-risk tasks:
1. Assess the Job First
- Measure the eaves height from ground level. If it's 3 metres or more, compliant edge protection is mandatory, full stop.
- Check the roof pitch. Low-pitched roofs (under 25°) require edge protection even for short tasks.
- Identify access points — where will the scaffold tower or system be positioned?
2. Clear the Work Area
- Remove garden furniture, pot plants, and obstacles from around the perimeter of the house.
- Ensure the ground is firm and level where scaffold feet will be placed.
3. Use a Proprietary Scaffold Tower for Very Minor Tasks
For very low eaves (under 3 metres) and extremely brief tasks, a mobile scaffold tower hired from Bunnings or Mitre 10 may be appropriate — but you must follow the manufacturer's instructions exactly, ensure the tower is on firm ground, and never lean out beyond the guardrails.
4. Never Use Ladders as a Substitute
A ladder leaning against the fascia is not edge protection. It does not prevent a fall from the roof surface itself.
Typical Edge Protection Setup for a Low-Pitched Roof
| Component | Purpose | Minimum Spec |
|---|---|---|
| Standards (uprights) | Support the rail system | Spaced per manufacturer's guide |
| Top guardrail | Primary fall barrier | Min. 900 mm above roof edge |
| Mid-rail | Secondary barrier | Midway between top rail and toeboard |
| Toeboard | Prevents materials falling | Min. 100 mm high |
| Base plates / sole boards | Spread load on ground | Required on soft ground |
When to Call a Professional
You should always engage a qualified scaffolder when:
- The eaves height is 3 metres or more (which is most NZ homes)
- The roof pitch is under 25° (low-pitched)
- You are doing anything more than a very brief inspection
- You are unsure about any aspect of the setup
- You are hiring workers or contractors to do the roof work — under the HSWA, you have a duty to provide a safe working environment
A licensed scaffolder will erect a system that meets WorkSafe NZ requirements, and you'll have peace of mind that it's done correctly. You can find qualified local scaffolders on tradedirectory.co.nz.
A Note on Building Consent
Edge protection itself does not require a building consent. However, if the roofing work you're doing involves structural changes or re-roofing, you may need consent. Check with your local council or visit MBIE Building Performance for guidance on Schedule 1 exemptions.
Safety Reminders
- Never work on a wet or damp roof — low-pitched roofs become extremely slippery
- Wear non-slip footwear at all times
- Work with a buddy who can call for help if needed
- Check the weather forecast before starting any roof work
