Guides

Guides to electrical, solar, air conditioning and roofing work

This is a general information site for Australian home owners. Each guide below explains what a job usually involves, the signs that tell you it might be needed, and the questions worth asking the licensed tradesperson you hire.

Start here

Understand the job before you start ringing around

When you know roughly what a job involves, the conversation with a licensed tradesperson is shorter, the quotes are easier to compare, and you are less likely to be sold work your home does not need.

These guides are written in plain language for home owners. They do not replace an on site assessment by a licensed tradesperson who has actually looked at your property. Use them to get your bearings, then get more than one quote and compare them line by line.

The guides

Five topics that cover most home owner questions

01

Electrical work

This covers the fixed wiring of your home: switchboards, rewiring older properties, safety switches, and three phase supply. It is the category most home owners bump into first, usually through a switchboard that is out of room or a circuit that keeps tripping.

What the work involves

A switchboard upgrade typically means a new enclosure with safety switches protecting the circuits. Rewiring means replacing old cable throughout the home, which is invasive and depends on roof and wall access. Three phase supply relates to how power is delivered to the property and what equipment can run from it. All of this is fixed wiring work carried out by a licensed electrician.

Signs you might need it
  • An older board with ceramic fuses or no safety switches visible.
  • Lights flickering, circuits tripping repeatedly, or a burning smell near the board.
  • Cracked or perished cable insulation in an older home.
  • Plans to add equipment that draws a lot of power.
Questions to ask
  • What exactly is included, and what is listed separately?
  • Who will sign the electrical safety certificate for the work?
  • What happens if the wiring fails testing once the job starts?
  • Can you explain the difference between single phase and three phase supply for my situation?
02

Solar and batteries

Solar panels and home batteries are a common upgrade, and the parts most people underestimate are the site assessment and the wiring between the equipment and the rest of the home.

What the work involves

Panels are mounted on the roof, connected through an inverter, and wired into your switchboard. A battery stores what the panels generate so you can use it later. The job usually includes mounting, cabling, an inverter, a connection to your board, and paperwork at the end. Roof condition, shading and the age of your switchboard all affect the plan.

Signs you might need it
  • Power bills that feel out of step with how much you use.
  • A roof that gets good sun for most of the day.
  • An existing system that is old and no longer performing.
  • An interest in storing your own generation rather than exporting it.
Questions to ask
  • How was the system sized for my usage and my roof?
  • What is covered by the warranty, and for how long on each part?
  • Does my switchboard need work before this can be connected?
  • What happens at the end of the system life, and who removes it?
03

Air conditioning

Air conditioning is part installation, part electrical work. The unit itself is only one piece of the job; the position, the electrical supply and the drainage all matter.

What the work involves

A split system has an indoor unit and an outdoor unit connected by pipework and cabling. The installer positions both, runs the pipework, and provides a dedicated electrical supply. Larger or multi room systems may need more supply capacity. Ducted systems add ductwork through the roof or under the floor.

Signs you might need it
  • Rooms that are hard to keep comfortable in summer or winter.
  • An older unit that is noisy, leaking or no longer cooling well.
  • Plans to add a room or extend the house.
  • Damp or mould that keeps returning despite ventilation.
Questions to ask
  • What size unit suits the room, and how was that decided?
  • Is a dedicated electrical circuit needed, and is it in the quote?
  • Where will the outdoor unit sit, and how will it be supported?
  • Where does the condensate drain go?
04

Roofing: repairs, restoration and replacement

Roof work covers a wide range, from patching a leak to restoring an ageing roof to a full replacement. The right answer depends on the condition of the roof and what is underneath it.

What the work involves

A repair deals with a specific problem such as a cracked tile, a failed flashing or a damaged section of sheet roofing. Restoration usually means cleaning, treating and recoating an existing roof to extend its life. Replacement means removing the old covering and installing a new one, and often includes checking the battens, insulation and roof sarking while the roof is open.

Signs you might need it
  • Stains on the ceiling or damp patches after rain.
  • Cracked, slipped or missing tiles or sheets.
  • Rust or corrosion on metal roofing.
  • A roof that is visibly tired and shedding its coating.
Questions to ask
  • Is this a repair, a restoration or a replacement, and why?
  • What is the condition of the parts underneath the covering?
  • What is excluded from the quote, such as scaffolding or disposal?
  • What warranty applies, and what does it actually cover?
05

Solar panel meshing for bird control

Birds nesting under solar panels are a common problem. They build nests in the gap between the panels and the roof, which can lead to mess, noise and damage to cabling over time. Meshing closes that gap.

What the work involves

A coated wire mesh is fitted around the perimeter of the array to stop birds getting underneath, fixed so it follows the shape of the panels and the roof. The installers need to work safely at height and take care not to disturb the panels, the mounting or the wiring while fitting it.

Signs you might need it
  • Birds seen flying in and out from under the panels.
  • Nesting material, droppings or feathers around the array.
  • Noise from the roof, especially early in the morning.
  • Chewed or disturbed cabling noticed during a check.
Questions to ask
  • Will fitting the mesh affect the panels or the mounting?
  • How is the mesh fixed, and will it damage the roof surface?
  • Does the work involve any electrical components, and who is licensed for that?
  • What does the mesh look like from the street?
🔧
🏠
How to use these guides

Four things to settle before any work begins

Is the quote itemised?

A single lump sum tells you very little. Ask for labour, materials and testing listed separately, with any allowance for unknown conditions written down rather than left implied.

Who is signing off on the work?

Ask for the name and licence number of the person responsible, and check it yourself against the relevant state register before work starts.

What happens if something needs opening up?

Agree in advance who patches walls, ceilings or roofing once the work is done. Many quotes stop at making the area safe, not at restoring the surface.

Is anything else affected?

Adding a new circuit, a solar system or air conditioning can put pressure on a switchboard that is already full. Ask whether the board needs attention before the new work goes in.

Getting started

How to work through this site

1

Read the guide

Start with the guide closest to your situation. Each one is written to be read in a few minutes.

2

Check the jargon

The resources page translates the terms that get thrown around in quotes so nothing catches you by surprise.

3

Ask better questions

Go into the conversation with the questions from the guide and the quotes get much easier to compare.

Common questions

What home owners ask most

Do I need a licensed tradesperson for this work?

Yes. Electrical work, solar and battery installation, air conditioning installs and roofing should all be carried out by a licensed tradesperson in the relevant field. Ask for the licence and check it against your state register before work begins.

How do I check a licence is real?

Each state and territory has a public register of licensed trades. Search by name or licence number, and make sure the scope on the licence matches the job you are having done.

Why do quotes for the same job differ so much?

Usually it comes down to different assumptions about access, different quality of materials, and whether testing and certificates are included or added afterwards. Compare the line items, not just the total.

Can I do any of this myself as a home owner?

Some minor tasks are permitted for home owners in some states, but anything involving fixed wiring, new circuits, the switchboard, roofing at height or solar equipment should go to a licensed tradesperson. Check what applies where you live.

Where this advice fits

This site is a general information service. Nothing here substitutes for an on site assessment by a licensed tradesperson who has actually seen your property.

Use these guides to understand the shape of the job, then get more than one quote and compare them line by line.

Not sure which guide you need?

Read the resources page for a plain glossary, or visit the about page to see what this site does and does not cover.

Read the guides