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Garage Flooring

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The garage floor is the slab in an Australian house that nobody designed for looks. It carries a car, it gets hot, it takes rain off the tyres and oil off the sump, and on most houses it was poured at the same time as the rest of the slab and then left bare. So the question of what to put on it is really a question about a piece of structure you have been walking on for years without inspecting.

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There is one consideration here that does not apply to any other floor in the house, and it catches people out. On a slab-on-ground home, the perimeter of that slab is very often the termite inspection zone. Queensland's Standards and Tolerances Guide explains that where a termite management system is required, most systems rely on a 75 mm visual perimeter inspection zone, so that termite workings are forced into view. A coating, a tile bed, a raised timber deck floor or a run of storage built tight to the wall can bury the one thing the system relies on.

That does not mean a garage floor cannot be finished. It means the finish has to be chosen knowing where the slab edge is, what the durable notice in your meter box says about the termite system, and how an inspector will still see what they need to see. Any contractor quoting a garage floor in a termite area should be able to talk about this without being prompted.

What people actually put on an Australian garage slab

  • Nothing but a penetrating sealer or densifier: hardens the surface and cuts dusting, keeps the slab visible, and is the least intrusive option where termite inspection matters.
  • Roll-on or flake epoxy: a bonded resin system that hides slab imperfections and cleans easily, covered in detail in the epoxy flooring guide.
  • Polyurethane or polyaspartic topcoats: chosen where the floor gets direct sun through the roller door and colour stability matters.
  • Porcelain or full-body tiles: durable and handsome, but they add height, need a bedding system that can take a vehicle, and bury the slab surface completely.
  • Interlocking PVC or polypropylene tiles: dry-laid, liftable, forgiving of a cracked slab, and the only option that can be taken up for an inspection in an afternoon.
  • Roll-out vinyl garage matting: the least permanent answer, good at containing drips, and the one that traps moisture underneath if the slab is damp.
  • A grind and polish of the existing slab, which is a concrete floors job rather than a coating job and produces a genuinely permanent surface.

The termite inspection zone, and why it limits what you can lay

The ABCB Housing Provisions require a termite management system where a Class 1 or 10 building is built in an area where subterranean termites are a potential risk and primary building elements are susceptible to attack. The system must comply with AS 3660.1, or have been tested to AS 3660.3, and a durable notice must be permanently fixed in a prominent location such as the meter box stating the system used, the date of installation, the life expectancy of any chemical, and the inspection and maintenance recommendations. That notice is the first thing to read before you touch a garage floor.

Queensland's guide then explains how the system is meant to work in practice: the 75 mm visual perimeter inspection zone exists so that termites building around a barrier are forced into view, and work is defective if the inspection zone has not been provided in accordance with the NCC, AS 3660.1 or the manufacturer's instructions. It also notes that the zone is not the contractor's problem if the owner obstructs it afterwards — which is precisely what a raised floor, a tiled skirt or built-in shelving against the wall can do.

Cracks matter for the same reason. The guide states that where a slab is designed to act as part of a termite management system, cracks through the slab must not exceed Category 1 width, and that repairs to such a slab are defective unless they reinstate the termite management system in accordance with the NCC. So a crack repair in a garage is not only a cosmetic decision — in a termite area it is part of a system, and it should be done by someone who knows that.

Reading a garage slab before you cover it

  • Fine surface dust that reappears every time you sweep, which means the surface has dusted off and needs densifying or grinding, not coating over.
  • Dark patches that never dry out at the back or the low side of the garage, which point at moisture coming through the slab rather than being spilled on it.
  • Spalling or pitting in a patch, particularly under where a car sits, which is a surface durability problem worth diagnosing before it is buried.
  • Cracks that run right across the slab rather than stopping at a joint, which need measuring against the damage categories rather than filling on sight.
  • A step, a fall or a drain at the door, which is there to keep water out of the house and must not be lost under a new floor level.
  • White crystalline deposit at a crack or joint, which is efflorescence and a sign water is moving through the slab.
  • Oil staining, which has to be removed rather than sealed over, because no coating bonds to it.

Bonded, bedded or loose-laid: choosing by what you may need to undo

A bonded finish — epoxy, polyurethane, a sealer, a polish — becomes part of the slab. It is the toughest, the easiest to clean and the hardest to reverse, and it follows every fall and undulation the slab already has. If your slab is sound, if the drainage at the door works and if the inspection zone is not affected, this is usually the best long-term answer.

A bedded finish — tiles on adhesive over a screed — gives you a level surface on an unlevel slab and a genuinely hard wearing one, at the cost of height and reversibility. Height is the constraint most people underestimate: a tiled garage floor raises the level at the roller door threshold, at the internal door into the house and at any step down from the house, and it can compromise a fall that was there to keep water outside.

A loose-laid finish — interlocking tiles or matting — is the pragmatic middle. It covers a cracked or stained slab, takes a car, comes up when you need to inspect, repair or sell, and can be replaced in sections. It is also the only option that lets you lift the perimeter and show a pest inspector the slab edge without demolition. In a house with an active termite management system, that alone can decide it.

How the work should run

Clear the garage completely, including whatever is stacked against the walls, because the perimeter is where the slab edge and the inspection zone live and it is the part that never gets looked at. Read the termite durable notice while you are there. If the house is in a termite area and you cannot find the notice, a pest inspection before the floor work is cheap relative to what it can save.

Then the assessment: moisture, soundness, cracks measured rather than glanced at, falls checked with a level and a straight edge, and the slab edge exposure recorded. Any crack repair, spall rebuild or grinding happens before any decision about finish, because the state of the slab often eliminates options. A slab moving seasonally will crack a rigid finish again.

Finally the finish, with two details that get skipped. First, the threshold: where the new floor meets the roller door, the internal door and any step, and how water that blows under the door still gets out. Second, the perimeter: where the finish stops relative to the wall and the slab edge, and whether a pest inspector can still see what they need to. Both belong on the quote drawing, not in a conversation.

Keeping a garage floor

  • Sweep before you hose; grit under a tyre is what scratches every finish, bonded or not.
  • Keep the door threshold and any grate clear so that water driven under the roller door in a storm still leaves.
  • Deal with oil and fuel quickly rather than letting it sit, since dwell time rather than contact is what damages a coating or stains bare concrete.
  • Lift matting or interlocking tiles periodically and let the slab dry, because anything loose-laid over a damp slab holds moisture underneath.
  • Keep storage off the perimeter in a termite area so the slab edge stays visible, and keep the durable notice where it was fixed.
  • Book the termite inspections the durable notice recommends and make the garage accessible for them; a system nobody can inspect is not a system.
  • Watch new cracks rather than filling them immediately — a crack that keeps opening and closing with the seasons is telling you something a filler will hide.

What to agree before anyone starts, and finding the trade

Put four things on the quote that garage floor quotes usually leave out: what happens to the slab edge and the termite inspection zone, what the finished level is at every threshold, how cracks are being treated and whether any of them are in a slab forming part of a termite management system, and what the moisture testing showed. Those four are where the disputes come from.

Licensing depends on what is actually being done. In Queensland, resin and seamless floor coverings sit in the QBCC's floor finishing and covering (hard sector) class, tiling is its own class, and concreting is another again. In New South Wales, Service NSW's licence check covers residential building work and the occupational trades, and the other states run their own registers. Ask which class the contractor holds for the specific work.

The Australian Consumer Law guarantees — acceptable care and skill, fitness for any stated purpose, a reasonable time — apply on top of whatever is written. Use LokalMatch to get a few quotes on the same brief, and include a photograph of the slab edge at the roller door and of the durable notice in your meter box. Contractors who engage with those two photographs are the ones who have understood the job.

Garage Flooring: frequently asked questions

Will a garage floor coating affect my termite protection?

It can. Most termite management systems rely on a visual inspection zone at the slab perimeter — Queensland's guide describes a 75 mm zone — so that termite workings are forced into view. Anything that buries the slab edge, including a coating carried up the wall, a tiled skirt, a raised floor or storage built tight to the perimeter, can obstruct it. Read the durable notice in your meter box first and tell the contractor what it says.

Should I fix the cracks before finishing the floor?

Yes, and in a termite area the repair method matters. Queensland's guide says cracks through a slab forming part of a termite management system must not exceed Category 1 width, and that repairs to such a slab are defective unless the termite management system is reinstated in accordance with the NCC. So a crack repair there is part of a system, not a cosmetic fill.

Can I tile a garage floor?

You can, with tiles rated for vehicle loading and a bedding system to match, but check the height first. Tiling raises the floor at the roller door threshold, at the internal door into the house and at any step, and it can defeat a fall that was there to keep water outside. It also buries the slab permanently, which is a consideration where termite inspection matters.

Why is my garage floor always dusty?

The surface layer has broken down, usually because the slab was finished or cured poorly or has simply worn. Sweeping removes the dust and makes more. The answer is to treat the surface rather than cover it: grinding to sound concrete, a penetrating densifier, or a bonded coating. Painting over a dusting slab bonds the paint to loose material and it will lift.

Is interlocking tile a serious option or a stopgap?

It is a serious option in the right house. It tolerates a cracked or stained slab, takes vehicle loads in the right grades, can be replaced in sections and comes up for inspection or repair. Its real weakness is moisture: over a damp slab it holds water underneath, so lift it periodically and let the slab dry.

Does water get under the roller door?

In most Australian garages, in a decent storm, yes. That is why there is usually a fall, a step or a grate at the door. Whatever floor you put down must not flatten that fall or block that grate, and a new finish that raises the level at the threshold is the most common way people accidentally start getting water into their garage.

Sources

  1. ABCB Housing Provisions Standard 2022, Part 3.4 termite risk management
  2. QBCC Standards and Tolerances Guide (Queensland, December 2023)
  3. QBCC licence class: floor finishing and covering (hard sector)
  4. Service NSW: check a builder or tradesperson licence
  5. ACCC: consumer rights and guarantees

Written by the LokalMatch editorial team. Last reviewed 22 September 2026. How we write and check our guides

What affects the cost of garage flooring

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Floor area and the number of rooms
  • Type and grade of flooring
  • Removal of the existing floor
  • Subfloor repairs or levelling
  • Stairs, angles and custom cuts
  • Trim, transitions and baseboards

How to compare flooring contractors before you hire

  • Choose an installer who works regularly with the type of flooring you want, since hardwood, tile, vinyl and carpet each need different skills.
  • Ask them to check the subfloor and moisture levels before giving a final price.
  • Get a written quote that covers removal of the old floor, subfloor prep, underlay, trim and transitions.
  • Ask whether you or the installer will supply the flooring, and who is responsible for ordering extra for waste.
  • Look at recent work in person or in photos, paying attention to seams, edges and transitions.

Questions to ask flooring contractors before you hire

  • Will you remove and dispose of the old flooring?
  • How will you check and prepare the subfloor?
  • Is my space suitable for this type of flooring, especially in a basement, kitchen or bathroom?
  • Are baseboards, transitions and stair nosings included?
  • Will you move the furniture and appliances, or should I?
  • Does your workmanship warranty cover problems like lifting, gaps or cracked tiles?

Garage flooring permits and local rules

Some garage flooring work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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