Bathroom Renovation Order Checklist: What to Confirm Before Checkout

When renovating an Australian bathroom, the difference between a smooth installation and weeks of expensive site downtime often comes down to just 15 millimetres of tile build-up, an unvetted toilet waste set-out, or an unslotted basin waste. Walking through this trade-tested checklist before placing your order ensures your products arrive on site ready for your plumber and tiler to install without friction.

1. Measure Finished Surfaces, Not Framing Studs

The most common measurement mistake homeowners make is measuring bare timber studs or masonry walls before wall linings and tiling are installed. Between fibre cement sheeting (10mm villaboard), waterproofing membranes (AS 3740), tile adhesive (3–5mm), and the tiles themselves (8–12mm), your room opening will shrink by 25mm to 40mm per wall.

• Alcove vanities: If your vanity sits enclosed between three walls, never order a 1200mm cabinet for a 1200mm framed opening. Wait until walls are fully sheeted and tiled, or select a slightly smaller vanity (e.g. 1180mm with filler strips) to guarantee a clean fit.
• Door swing & drawer clearances: Verify that the main bathroom door, shower screen door, and vanity drawers can open simultaneously without clashing. Aim for a minimum 100mm clearance from vanity gables to door architraves.
• Ceiling and bulkhead clearance: Confirm the total height of shaving cabinets, tallboys, and overhead shower heads against bulkheads, cornice lines, and light fixtures.

2. Check Plumbing Rough-In Compatibility

Plumbing rough-in positions cannot easily be shifted once pipes are set inside wall cavities or concrete floor slabs. Confirm these critical technical items with your plumber:

• Toilet waste set-out (S-Trap vs P-Trap): Check whether your waste pipe goes through the floor (S-trap) or the wall (P-trap). For S-trap suites, measure the exact distance from the finished tiled wall to the centre of the floor pipe. Australian S-trap set-outs typically range between 90mm and 180mm. An incorrect set-out will force an expensive floor core or an unsightly offset pan collar.
• Vanity waste & internal drawer cutouts: Contemporary floating vanities feature deep storage drawers with a central U-shaped cutout. Ensure your plumber positions the water inlet mini-stops and waste outlet within this clearance channel so drawers can close smoothly.
• In-wall mixer bodies: Concealed shower mixers, diverters, and wall basin spouts must have their rough-in bodies secured to timber noggings before sheeting and waterproofing. Never order wall-mounted tapware after wall linings are up.

3. Decode Listing Inclusions (Avoid the Missing Parts Surprise)

Online bathware listings vary widely in terms of what is bundled versus sold separately. Always double-check the itemised specifications:

• Cabinet-only vs complete vanity sets: A "Cabinet Only" listing supplies only the furniture body and runners. You must select your vanity top (ceramic, stone, or timber), basin, tapware, and waste trap separately.
• Basin overflow compatibility: If your basin features an overflow hole, you must pair it with a slotted 32mm pop-up waste. A non-overflow basin requires an unslotted waste. Fitting an unslotted waste to an overflow basin creates chronic water trapping and unpleasant odours.
• Watermark & WELS compliance: In Australia, all mixers, shower heads, toilets, and valves must carry valid Watermark certification and WELS registration to pass certifier sign-off and comply with the National Construction Code (NCC).

4. Delivery Coordination and the 48-Hour Unboxing Window

Heavy, fragile bathware—such as 100kg stone slabs, freestanding acrylic tubs, and 10mm toughened glass panels—requires practical logistics planning on site:

• Site access & storage: Ensure a dry, sheltered ground-floor space is prepared on site. Vanities and joinery must never be stored on damp concrete or left out in the weather.
• The 48-hour inspection rule: Open all packaging and inspect items within 48 hours of delivery, before your trades arrive to install. Check for freight scuffs, chips, or hairline cracks. Under Australian industry warranty terms, once a product is permanently installed or siliconed into place, claims for transit damage cannot be accepted.