How to Safely Use a Pole Saw to Trim High Branches

Trimming high branches with a pole saw is something many NZ homeowners tackle themselves — and with the right preparation, it can be done safely. However, working overhead with a cutting tool carries real risks, so understanding correct technique and knowing your limits is essential before you start.

What Is a Pole Saw and Which Type Should You Use?

A pole saw is an extendable saw — either manual or powered — designed to cut branches that are out of normal reach. The main types available in New Zealand are:

• Manual pole saws – A pruning saw blade on an extendable fibreglass or aluminium pole. Best for lighter branches up to around 75–100 mm in diameter.
• Electric (corded or battery) pole saws – Chainsaw-style bar and chain on a pole. Faster cutting but heavier and requires more control.
• Petrol pole saws – Most powerful option, suited to thicker branches, but heavier and noisier. Generally better left to professionals.

For most DIY homeowners, a battery-powered pole saw offers a good balance of power and manageability. You'll find a range of options at Bunnings or Mitre 10.

Personal Protective Equipment (PPE) — Non-Negotiable

Before you pick up any pole saw, gear up properly. WorkSafe NZ recommends appropriate PPE for all cutting and overhead work:

• Safety helmet (hard hat) to protect against falling branches
• Safety glasses or goggles — sawdust and wood chips fall directly downward
• Hearing protection if using a powered saw
• Cut-resistant gloves
• Sturdy, closed-toe boots — ideally steel-capped
• Long sleeves and trousers — no loose clothing that could catch

Never use a pole saw while standing on a ladder. The combination of an overhead cutting force and an unstable platform is a leading cause of serious falls.

Planning the Cut — Before You Start

Good preparation prevents most accidents:

1. Assess the branch size and position. Pole saws are generally suited to branches up to about 150 mm in diameter. Anything larger, or branches under significant tension, should be left to a qualified arborist.
2. Check for powerlines. This is critical in New Zealand. If any branch is close to a powerline, stop — this is specialist work. Check with your lines company for the applicable safe approach distances. Contact your lines company or hire a certified arborist. Working near powerlines is covered by WorkSafe NZ electrical safety guidelines.
3. Identify the fall zone. Work out where the branch will land and clear the area of people, pets, vehicles, and structures. Establish a drop zone at least 1.5× the length of the branch in all directions.
4. Check the branch for tension. A branch growing upward or outward under load can spring unpredictably when cut. If you're unsure, call a professional.
5. Tell someone you're working. Never work alone when using overhead cutting tools.

Correct Cutting Technique

Using the three-cut method prevents bark tearing and protects the tree's health:

Never cut flush with the trunk — always leave the branch collar intact. The collar contains the tissue the tree uses to seal the wound.

Pole Saw Positioning Tips

• Keep the pole at a slight angle rather than directly vertical — this gives you better control and reduces the chance of the saw binding.
• Use smooth, steady strokes rather than forcing the cut.
• Keep both feet firmly on the ground, shoulder-width apart.
• Never reach beyond a comfortable, balanced stance.
• Extend the pole only as far as needed — a longer pole is harder to control.

Powered Pole Saw Safety

If you're using an electric or petrol pole saw, these additional rules apply:

• Read the manufacturer's manual before use — every model differs.
• Check the chain tension and lubrication before starting.
• Engage the chain brake whenever you're repositioning.
• Never operate a powered pole saw above shoulder height for extended periods — fatigue increases risk significantly.
• Keep bystanders well clear of the work area.

Tree Work and the NZ Building Code

Most routine pruning of your own trees doesn't require a building consent, but there are situations where you need to check with your local council:

• Protected trees — many councils have Notable Tree schedules in their district plans. Pruning or removing a protected tree without consent can result in significant fines.
• Trees near boundaries — work affecting neighbouring properties may have legal implications under the Resource Management Act.

Always check with your local council before undertaking significant tree work. MBIE Building Performance can also provide guidance on consent requirements.

When to Call a Professional

Some tree work is simply beyond safe DIY scope. Call a qualified NZ arborist if:

• The branch is larger than 150 mm in diameter
• The tree or branch is near powerlines
• The branch is over a structure, vehicle, or public area
• The tree shows signs of disease, decay, or structural weakness
• You need to work at height beyond comfortable ground-level reach
• The job involves removing large sections of the tree (significant pruning or felling)

A qualified arborist will hold relevant training (such as an NZ Certificate in Arboriculture) and carry appropriate insurance. You can find experienced, local arborists on tradedirectory.co.nz.

Sources & Further Reading

• WorkSafe NZ — Working Safely at Height
• MBIE Building Performance — Building Consent Information
• BRANZ — Tree and Vegetation Guidance
• Bunnings NZ — Pole Saws and Garden Tools
• Mitre 10 NZ — Outdoor Power Equipment