Bathroom Mirrors: A Specification Guide for Australian Renovations
Most homeowners pick the mirror last. By then the electrician has already done the rough-in, the tiler has set the wall heights, and the vanity is either on site or on order. What feels like a late finishing touch has actually been constrained at every earlier stage — the wall light positions, the GPO locations, the available width above the vanity. The mirror you end up with is often the one that fits what’s already there, not the one you would have specified from scratch.
That’s the case for getting the mirror into the brief early. Not because it’s complicated, but because it sits at the intersection of several other decisions that are: electrical rough-in positions, waterproofing zone proximity, vanity top dimensions, and whether you’re fitting a mirror or a shaving cabinet — which affects all of the above in different ways.
The mirror-versus-shaving-cabinet question is the first fork in the road. It looks like an aesthetic call. It’s partly structural. A recessed shaving cabinet requires a wall cavity of 90–150mm, confirmed stud bay spacing, and a clear run of wall without services behind it. Get that wrong at the brief stage and you’re looking at a change order after tiling has started. This guide covers both paths — and the six mirror types that sit within and around them — so the decision gets made with the right information in hand.
Mirror Types: What Each Is Suited For
There are six types of mirror regularly specified in Australian bathroom renovations. They’re not interchangeable — each has its own applications, installation requirements, and failure modes. The ones that carry the most decision-making weight are frameless mirrors, illuminated/LED mirrors, and shaving cabinets. The rest are narrower in scope.
Frameless mirrors
The default in most contemporary Australian bathroom renovations. A frameless mirror is a single sheet of glass — typically 4–6mm thick — with a polished or bevelled edge, mounted directly to the wall with adhesive, standoff fixings, or a combination. They suit most situations: above a vanity, in a main bathroom, ensuite, or powder room.
The glass type matters more than most homeowners expect. Standard float glass has a green-grey tint caused by iron content in the silica — visible at the cut edge and increasingly obvious on larger formats. Low-iron glass (sold under names like Optiwhite) is significantly clearer and renders colour accurately. The difference is more apparent on mirrors above 900mm wide. The premium at supply level is real: typically 30–60% over standard float depending on format and supplier.
Mounting method is the other variable worth considering. Adhesive-only mounts work, but the adhesive must be mirror-safe silicone — standard construction silicone contains acetic acid that attacks the silver backing layer. Standoff fixings are more secure for heavier mirrors and simpler to remove if the bathroom is renovated again. In humid bathrooms, confirm the mirror edge is sealed with silicone after installation — exposed backing at the cut edge is where moisture gets in and edge blackening begins.
Supply cost: $80–$400, size and glass type dependent.
Framed mirrors
A framed mirror works well in a powder room, over a freestanding vanity, or in a period home where a frameless edge looks unfinished against traditional joinery. The frame material determines where it can and can’t go. Powder-coated aluminium and PVC hold up in humid environments. Solid timber and MDF do not — even with a sealed finish, sustained humidity causes swelling, warping, and finish failure over time. A framed mirror within the direct splash zone above a basin is fine if the frame is aluminium or a quality PVC. It’s a problem if it isn’t.
Supply cost: $120–$600.
Illuminated/LED mirrors
A growing category in Australian renovations, and for good reason. An LED mirror with the right colour temperature delivers better task lighting than most overhead or above-mirror fixtures. The two variables that matter most are light position and colour temperature.
Front-lit mirrors have LEDs along the face of the frame and cast light directly onto the face — the most effective configuration for task lighting and makeup application. Backlit mirrors have LEDs behind the glass, creating a soft perimeter glow — better for atmosphere than for inspecting detail. Edge-lit sits between the two in both light quality and price.
Colour temperature is where most people make a costly mistake. Warm white (2700K) is flattering but inaccurate — skin tones look better than they are, which defeats the purpose for makeup. Neutral white (4000K) is the most versatile. Daylight (5000K) is the only temperature that renders colour accurately enough for precise makeup application. If colour accuracy matters, specify 4000K or above.
One critical point: LED mirrors connect to mains power. That electrical connection must be made by a licensed electrician in Australia — it is not a DIY task, regardless of how the product instructions read. In Zone 2 (within 600mm horizontally of a bath or shower edge), the mirror must carry a minimum IP rating of IPX4 under AS/NZS 3000. Most mirrors sold in the Australian market meet this; check the specification sheet before purchasing. Most mid-range and above LED mirrors also include an integrated demister pad — worth confirming before specifying one separately.
Supply cost: $300–$1,200.
Demister mirrors (non-illuminated)
A demister mirror is a standard mirror with a resistive heating element behind the glass, thermostat-controlled, that keeps the mirror surface above dewpoint temperature so it stays clear while the bathroom is still steaming up. It does one thing well — the mirror is usable immediately after a shower.
What it doesn’t do is substitute for an exhaust fan. A demister prevents condensation on the mirror surface. It does nothing for humidity in the room, mould on grout, or condensation on other surfaces. In a well-ventilated bathroom, a demister is a useful convenience. In a poorly ventilated one, it treats a symptom while leaving the cause in place.
Supply cost: $180–$500.
Shaving cabinets — surface-mounted and recessed
A shaving cabinet occupies the same wall position as a mirror and serves the same primary function. The choice between the two is covered in depth in the decision framework section below. At the type level:
Surface-mounted cabinets sit proud of the wall by 100–150mm. The installation is straightforward — wall fixings into studs or solid blocking, no wall modification required. The visual result is a box on the wall, which some flush-face cabinet designs manage better than others.
Recessed cabinets sit flush with the wall surface. The look is cleaner, but the install requires confirmed timber-frame construction, a clear stud bay of at least 450mm, no services running through the target cavity, and a minimum wall depth of 90–150mm depending on the cabinet. In solid masonry or double-brick walls, a recessed installation is either impractical or requires significant additional work.
Supply cost: Surface-mounted $200–$600, recessed $350–$900.
Custom-cut mirrors
For non-standard sizes or shapes — an awkward alcove, a large-format single mirror spanning a double vanity, or a specific profile to suit an older-style bathroom. Custom mirrors are cut and edged by a glazier, typically to a 5–10 business day lead time. Order them before the tiling is finished, not after. Waiting until practical completion adds that lead time to the project close-out.
When specifying to a glazier: provide exact dimensions, edge treatment (polished, bevelled, or pencil edge), fixing method, and backing specification. Don’t assume the glazier will specify copper-free or safety-backed glass by default — state it explicitly if required.
Supply cost: $150–$500+, depending on size and complexity.
Mirror Size and Placement
Three sizing mistakes come up regularly in Australian bathroom renovations. The mirror is too small for the vanity it sits above. The mirror is centred on the wall rather than the vanity, creating a misalignment that reads as an error even if the homeowner can’t immediately identify what’s off. Or the mirror is mounted too high, leaving a gap between the splashback top and the mirror bottom that serves no purpose and looks proportionally wrong. None of these are hard to avoid, but all of them require the mirror dimensions to be confirmed before electrical rough-in and before tiling begins.
Width
The standard approach: mirror width equal to, or up to 50mm narrower on each side than, the vanity top. A 1,200mm vanity top warrants a mirror in the 1,100–1,200mm range. Narrower than that and the mirror looks undersized — it appears to be floating without context. Wider than the vanity top and the proportions invert; the mirror dominates the vanity rather than sitting above it. On a double vanity, the choice is one large mirror spanning the full width or two individual mirrors centred over each basin. Either works — resolve the choice before rough-in, because it directly affects wall light positioning.
Height
Mirror height for a standard single bathroom mirror runs 600–900mm. Taller formats work in rooms with higher ceilings or where the mirror is being used as a deliberate vertical design element. The bottom edge of the mirror typically sits at splashback height — around 900–950mm from finished floor level depending on the tile layout. Don’t leave an unexplained gap between the splashback top and the mirror bottom unless there’s a clear design reason for it.
Mounting height
Mirror centre at approximately 1,600–1,650mm from finished floor level suits standard adult eye height. In a bathroom used regularly by both adults and children, a lower centre point is worth considering.
Centring
Centre the mirror on the vanity, not on the wall. In rooms where the vanity is centred on the wall, this makes no practical difference. In rooms where the vanity is offset — positioned against one wall with a toilet beside it, for example — centring the mirror on the wall creates a visible misalignment with the vanity beneath it. It’s one of the more common finish-stage errors in residential renovation, and one of the more obvious ones once you know to look for it.
Wall light positioning
Side-mounted lights flanking the mirror are the current standard in contemporary Australian bathrooms, producing shadow-free task lighting that overhead or above-mirror fittings can’t replicate. They typically sit at 1,500–1,600mm from finished floor level. Their position is determined by the mirror width — the conduit rough-in position depends on knowing the mirror dimensions before the electrician returns for second fix. If the mirror decision gets made after rough-in, the light positions are already fixed and the mirror has to work around them.
Compliance note: Any electrical fitting within Zone 2 (within 600mm horizontally of a bath or shower edge) must meet a minimum of IPX4 under AS/NZS 3000. This applies to wall lights flanking the mirror, integrated LED mirror connections, and any GPO in the area. Electrical connection requires a licensed electrician — this is not a DIY task in Australia.
Material and Finish Considerations
This is where specification decisions separate a mirror that performs for twenty years from one that starts showing edge deterioration inside three. The glass, the backing, the edge sealing, and — where a frame is involved — the frame material all contribute.
Glass
Standard float glass is what most mirrors are made from. It has a slight green-grey tint caused by iron content in the silica — visible at the cut edge and increasingly apparent on larger formats. On mirrors under 800mm wide, the tint is rarely noticeable in use. On larger mirrors, or anywhere that colour accuracy matters, it’s worth addressing.
Low-iron glass — sold as Optiwhite, UltraClear, or similar — is manufactured with significantly reduced iron content. The colour cast is effectively eliminated, and the reflective quality is visibly different from standard float when you place the two side by side. The premium is real: typically 30–60% over standard float depending on size and supplier. It’s a relevant upgrade for any large-format mirror and for applications where skin tone or colour rendering matters.
Glass thickness: 4mm is standard for mirrors up to approximately 900mm in either dimension. Above that threshold, 6mm glass is the appropriate specification. It reduces flex — which produces distortion at the perimeter of large thin mirrors — and adds structural stability over larger wall areas.
Backing and moisture resistance
The silver reflective layer sits on the back of the glass. Behind it is either a copper protective layer (traditional mirrors) or a copper-free coating (moisture-resistant mirrors), followed by a paint layer. Moisture that penetrates the edge seal attacks this layering from the edge inward, producing the grey-black edge discolouration known as foxing.
Copper-free backing is significantly more resistant to moisture-related corrosion. It costs marginally more at supply level and is worth specifying in any bathroom with limited ventilation, or for a mirror positioned in direct proximity to steam.
Edge sealing on installation matters. The mirror back should not sit flush against a wall with no perimeter treatment — moisture finds its way in. A bead of mirror-safe silicone around the perimeter after installation seals the vulnerable edge. Standard construction silicone is not the right product; it contains acetic acid that attacks the silver backing. Use silicone specified as mirror-safe or neutral-cure.
Frame materials
Powder-coated aluminium is the correct frame material for bathroom environments. It is moisture-resistant, dimensionally stable, and available in the standard current finishes — matte black, brushed gold, brushed nickel, chrome.
Timber and MDF frames are not appropriate in wet or humid bathroom environments unless the room runs essentially dry. Even with a sealed finish, sustained humidity causes swelling, finish cracking, and eventual frame failure. It’s a gradual process that takes a few years to become obvious, at which point the mirror is usually past practical repair. Suitable in a dry-zone powder room; not in a main bathroom or ensuite with regular shower use.
PVC-framed mirrors are budget-category product. Moisture-resistant and structurally stable, but prone to yellowing and warping under sustained heat and steam. Not recommended for a primary bathroom where steam is generated daily.
Anti-fog coatings vs demister pads
Surface anti-fog coatings work by spreading condensation into a thin transparent film rather than letting it form droplets. Performance is reasonable when new; it degrades with repeated cleaning — particularly with products containing alcohol or solvents. A freshly coated mirror performs noticeably better than the same mirror two years later.
A demister pad is the reliable long-term solution. It keeps the mirror surface above dewpoint temperature so condensation cannot form in the first place. Most mid-range and above LED mirrors include an integrated demister pad. For a standard mirror without one, a demister pad can be retrofitted — it requires hardwiring by a licensed electrician.
Compliance note: Under AS/NZS 2208 (Safety Glazing Materials in Buildings), some mirror applications require a backing film that holds glass fragments in place on impact. Whether this applies to a specific installation depends on the location and fixing method. A licensed contractor specifying and installing a bathroom mirror should be able to confirm whether safety backing is required for the specific application — don’t assume it isn’t.
Mirror vs Shaving Cabinet: A Decision Framework
The mirror-versus-shaving-cabinet choice looks like a storage decision. It’s also a structural decision, a budget question, and — if it’s made without checking the wall — a potential change order after tiling has started. Start with the wall. A recessed shaving cabinet needs 90–150mm of clear cavity depth behind the wall lining, a stud bay wide enough to fit the cabinet (most recessed cabinets are 450–600mm wide, which fits a standard 600mm stud bay), and confirmation that no services — plumbing, electrical conduit — run through the intended bay. In a standard timber-frame house, this is usually achievable with some investigation. In a double-brick, solid masonry, or concrete-block wall, a recessed cabinet is either impractical or requires significant additional work. Check the wall construction before the specification is finalised — this is a five-minute investigation that can save a three-figure change order.
The wet zone proximity issue catches people out more than the wall construction issue does. A recessed cabinet installed in or adjacent to a tiled shower wall creates a waterproofing continuity problem — the membrane needs to seal continuously around the perimeter of the recessed opening, which is technically difficult to achieve correctly around a box penetration. Most licensed waterproofers won’t certify the installation, and they’re right not to. The practical outcome: recessed shaving cabinets belong on the wall above the vanity, outside the waterproofed wet zone. If the bathroom layout puts the vanity close to the shower enclosure, a surface-mounted cabinet or a plain mirror is the lower-risk specification.
When a recessed cabinet makes sense: Timber-frame construction with confirmed wall cavity depth, the stud bay clear of services, the installation positioned above the vanity and outside the wet zone, and a household that genuinely needs the storage. Done correctly, the cabinet face sits flush with the wall and the storage is meaningfully useful in a main family bathroom.
When a mirror is the right call: Solid or masonry walls where creating a cavity is impractical, bathrooms where the vanity is positioned close to the shower enclosure, renovation scopes that don’t include a carpenter for wall modification, or any situation where the wall cavity hasn’t been confirmed before the product is ordered.
On cost: At supply level, a mid-range recessed cabinet and a mid-range LED mirror are not dramatically different in price. The installation costs diverge. Fitting a recessed cabinet correctly — including any wall modification and associated carpentry — will cost meaningfully more than wall-mounting a mirror. In a cost-sensitive brief, that difference matters.
What to Sort Out Before You Order
Seven things worth confirming before the order goes in. Each one has caused a problem on a renovation when it was left until later.
Lock in wall light rough-in positions before specifying mirror dimensions.
If side-mounted wall lights are planned, the electrician needs to know the mirror width before rough-in. That rough-in happens before tiling. Once the tiles are on the wall, the conduit is where it is. The mirror width should determine the light positions — not the other way around.
Measure the vanity top, not the cabinet box.
The reference dimension for mirror width is the top surface — including any overhang — not the cabinet carcass underneath it. These often differ by 30–60mm. Order from the wrong measurement and the mirror looks off above the vanity even if it’s hung straight.
Confirm wall construction type before specifying a recessed shaving cabinet.
Timber frame: likely feasible, pending a services check. Double brick, solid masonry, or concrete block: assume not feasible without further investigation and likely additional cost. Confirm before committing to the product.
Establish the tiling layout before finalising standoff fixing positions.
Adhesive-mounted mirrors can sit anywhere on the wall surface. Mirrors with standoff fixings require wall anchors — if those anchors land on a grout joint or tile edge, the fixing integrity is compromised. Work out where the grout lines will run before the fixing positions are finalised.
Verify IP rating compliance if specifying an illuminated mirror or demister.
In Zone 2 — within 600mm horizontally of a bath or shower — any electrical fitting must be rated to a minimum of IPX4 under AS/NZS 3000. Most Australian-market LED mirrors meet this; check the product specification sheet rather than assuming. The licensed electrician connecting the mirror will confirm compliance on installation.
Order custom mirrors before tiling is complete.
Lead time from a local glazier runs 5–10 business days from measurement to delivery. Waiting until after practical completion adds that lead time to the project close-out, which matters when the bathroom is already out of service.
Check delivery dimensions against site access.
A 1,500mm frameless mirror is fragile and awkward to manoeuvre through a standard hallway or up a staircase. Confirm access dimensions with the supplier before the order goes in, and confirm again on delivery day. Glass breakage between the delivery truck and a first-floor bathroom is more common than it should be.
Related: Full cost breakdown for bathroom renovations in NSW — what each trade line should include. See our bathroom renovation cost guide ›
Related: Bathroom vanity sizes, materials, and what to specify before ordering. See our bathroom vanity guide ›
Ready to Brief Your Bathroom Renovation?
Specification decisions — mirror type, electrical integration, shaving cabinet feasibility — tend to get resolved properly during the quoting process, not before it. A licensed renovator quoting the full scope will work through these questions as part of scoping the job, not leave them to be sorted out mid-build. If you’re at the stage of briefing a bathroom renovation in NSW or the Riverina and want a quote conversation with a licensed specialist, that’s the right place to work through decisions like these with someone who’s done it before.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. We connect homeowners and property professionals across NSW with vetted, licenced bathroom renovation specialists.
Common Questions About Bathroom Mirrors
The mirror itself has no minimum clearance requirement under the NCC or AS/NZS 3000. The restriction applies to any electrical component integrated with or adjacent to the mirror — the lighting, demister pad wiring, or nearby GPOs — which must meet Zone classification requirements. A plain unlit frameless mirror can be positioned wherever the design requires without triggering an electrical compliance issue. An LED mirror with a hardwired transformer, or wall lights flanking the mirror, must meet Zone 2 requirements (minimum IPX4) if within 600mm horizontally of a shower or bath edge. When in doubt, confirm with the licensed electrician before rough-in is done.
A plain frameless or framed mirror is generally a reasonable DIY job, assuming the wall fixings suit the substrate and the mirror weight is manageable for a two-person lift. Where it stops being a DIY task: any mirror with a hardwired electrical connection — LED mirrors, demister mirrors with a mains-connected heating element — must be connected by a licensed electrician. That’s a legal requirement in Australia, not a suggestion. A recessed shaving cabinet sits in similar territory — a competent DIYer can manage the cabinetry work in a timber-frame wall, but any electrical connection is licensed work and needs to be treated as such.
The grey-black edge discolouration — called foxing — is caused by moisture penetrating the mirror’s edge seal and attacking the silver or copper backing layer behind the glass. It almost always traces back to two things: inadequate edge sealing on installation and poor bathroom ventilation. A mirror in a steamy bathroom with an undersized exhaust fan, mounted flush to the wall without perimeter silicone, is a predictable candidate. The fix is straightforward: specify copper-free backing for any mirror going into a high-humidity environment, seal the mirror edges with mirror-safe silicone after installation, and confirm the exhaust fan is appropriately rated for the room volume. The edge sealing step takes ten minutes and gets skipped more often than it should.
Two options: one large mirror spanning the full vanity top width (typically 1,200–1,500mm for a standard double vanity) or two individual mirrors centred above each basin. A single mirror is simpler to source and install and tends to read as cleaner in most contemporary designs. Two individual mirrors allow different mounting heights and create a defined zone for each user — useful if the basins are used simultaneously and positioned well apart. In either case, mirror width should not exceed vanity top width. If side-mounted wall lights are planned, confirm mirror width and light positions together before electrical rough-in — not separately.
The glass is the same product. The differences are in backing treatment, edge sealing specification, and — for illuminated versions — IP rating for the electrical components. A decorative wall mirror without moisture-resistant backing and sealed edges will deteriorate faster in a bathroom environment than one sold specifically for the application. The label isn’t a guarantee of correct specification — check the backing material on the product data sheet. If you’re repurposing a decorative mirror in a bathroom, check the backing, seal the edges with mirror-safe silicone before hanging it, and make sure the exhaust ventilation is working properly. The mirror itself isn’t the problem; what surrounds it usually is.
Bathroom Mirror Specification — Done Once, Done Right
The specification decisions that determine whether a bathroom mirror performs for twenty years — glass type, backing treatment, edge sealing, electrical integration — get made before the mirror goes on the wall. Getting them right is a two-minute conversation at the brief stage. Undoing them later is not.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. We connect homeowners, investors, and property professionals across NSW with vetted, licenced bathroom renovation specialists.