How To Retile Bathroom: What Should Homeowners Know First?

The best way to retile a bathroom is to inspect the existing surfaces, repair any underlying problems, prepare the substrate correctly, complete waterproofing where required, and install new tiles using the correct materials and techniques. A successful bathroom retiling project depends just as much on the preparation beneath the tiles as the finish that is visible once the renovation is complete.

Why Retiling Is More Complex Than It Looks?

Tiling is the most visible layer of a bathroom renovation, but it is also the last layer to be installed, and everything beneath it has to be correct before a single tile is fixed in place.

Existing tiles hide the state of the substrate, waterproofing membrane, and structural surfaces behind and beneath them, and stripping those tiles is frequently where problems that have been developing for years become visible for the first time.

Old waterproofing membranes that have failed, fibrous cement substrates affected by moisture, and wall linings that have shifted or deteriorated are all common findings in Melbourne bathrooms being retiled after ten or more years of use.

A home renovation that addresses only the visible surface without correcting these underlying conditions creates a new tiled surface sitting over an unresolved problem, which will cause the same or worse issues in a much shorter timeframe than the original installation.

This is why retiling in Victoria is not simply a cosmetic project and why the waterproofing step has its own mandatory inspection point built into the sequence.

How to Demolish a Bathroom Before Retiling

Before any new tile can go down, the existing tiled surface has to come off and the substrate beneath it has to be fully exposed and assessed.

A full breakdown of how to demolish a bathroom for renovation covers the correct removal sequence, what to protect before demolition begins, what to look for as tiles come off, and how to handle the discovery of asbestos-containing materials in older Melbourne homes, which is a genuine consideration in properties built before the mid-1980s.

The key points that are specific to a retiling project are:

Starting with fixture removal, disconnecting services, and protecting the floor waste and drainage point before any physical demolition begins is standard practice.

Tiles should be removed progressively rather than aggressively, because the goal is to expose the substrate cleanly and assess its condition rather than to clear the room as quickly as possible.

Where the substrate is compressed sheeting that has absorbed moisture or shifted, it will need to be replaced in full before waterproofing can be applied, and discovering this early in the process gives the project the best possible foundation for what follows.

Waterproofing: The Non-Negotiable Step Before Any Tile Goes Down

Waterproofing a bathroom is a mandatory regulated step in Victoria, and it must be completed by a licensed waterproofer before any tiling begins.

The VBA’s guidance on waterproofing of wet areas is clear that compliant waterproofing in bathrooms and showers is critical to preventing moisture-related problems including mould growth, structural damage, and water infiltration into adjacent areas, and that the membrane must comply with the prescriptive requirements of the ABCB Housing Provisions Standard 2022.

In practical terms for a retiling project, the waterproofing requirements mean:

• The membrane must cover all wet area surfaces to the required height: the full shower interior, the floor within the defined wet area, and the wall surfaces to specified heights depending on whether the shower is enclosed or open.
• The membrane must cure before tiling begins: most liquid membranes require a minimum of 24 to 48 hours of curing time after application before tiles can be laid over them.
• A waterproofing inspection must be completed before tiles go down: the membrane is inspected and approved while it is still fully visible, because once tiles are laid on top, the condition of the waterproofing can no longer be assessed without destructive testing.
• A compliance certificate is issued on completion: this is the homeowner’s proof that the waterproofing was applied correctly and inspected to the required standard.
• Silicone joints, not grout, are used at all internal corners: movement between surfaces over time causes grout to crack at junctions, allowing water to track behind the tile surface. Correctly applied silicone at all floor-to-wall and wall-to-wall internal corners is the correct approach and is required under the standard.

Bathroom Renovation Steps: Where Tiling Fits in the Full Sequence

Tiling is not the beginning or the end of a retiling project in the same way it might appear from looking at the finished result, and understanding where it sits in the full bathroom renovations sequence is what allows homeowners to plan correctly and avoid the costly mistakes that come from trying to move faster than the process allows.

A detailed guide to bathroom renovation steps from planning through to completion covers the full sequence in order, from initial layout decisions and trade scheduling through to final compliance handover, and positions tiling clearly within the trades that must precede and follow it.

For a retiling project specifically, tiling cannot begin until demolition is complete, the substrate has been assessed and repaired, the waterproofing membrane has been applied, cured, and approved, and the floor has been confirmed level and correctly graded toward the waste point.

Once tiling is complete, grout must cure for at least 24 hours before the space is used, and the silicone at all junctions needs between 48 and 72 hours of cure time before the shower is wetted.

Rushing any of these intervals compromises the integrity of the finish and, in the case of the waterproofing inspection, creates a compliance failure that affects the certificate and the property’s records.

Choosing Tiles for a Bathroom Renovation

Tile selection is one of the most time-consuming parts of a retiling project, and it benefits from being decided well before demolition begins rather than during construction when trade schedules are already running.

Tiles need to be specified, ordered, and in many cases custom-cut to suit the room’s dimensions, and delivery lead times of two to four weeks for certain products mean a late selection decision can halt a project mid-construction.

Key decisions to make before ordering tiles:

• Floor tile format and slip rating: Floor tiles in wet areas require a slip resistance rating of P4 or P5 for areas that will be wet underfoot. Smaller format tiles create more grout lines and more drainage paths on a floor, which improves slip resistance on a shower floor compared to large format tiles.
• Wall tile format and weight: Large format tiles have become the standard for contemporary Melbourne bathrooms, but heavier tiles require appropriate substrate and adhesive to hold correctly on vertical surfaces.
• Matching grout colour: Grout colour affects the finished appearance as much as tile colour. Light grout reads clean but shows staining more readily over time. Matched or contrasted grout decisions should be made alongside tile selection, not after.
• Ordering with a waste allowance: A standard waste allowance is 10 to 15 percent on top of the measured tile quantity, accounting for cuts, breakages, and pattern matching. Custom formats and difficult room shapes require a higher allowance.

Working through tile selection with input from the building team before the project starts simplifies the procurement process. A guide to bathroom renovation suppliers for Melbourne homeowners covers where to source tiles, vanities, and fittings from suppliers who understand the requirements of the local home renovation market.

How to Renovate a Shower When Retiling

How to renovate a shower as part of a retiling project follows the same sequence as the broader retile but with specific additional requirements for the shower zone itself.

The shower floor must be correctly graded toward the waste at a minimum fall of 1:80 and a maximum of 1:50 under the Victorian housing provisions, and achieving this fall means the substrate preparation in the shower recess must account for that gradient before any membrane or tiles are applied.

The shower screen is removed and replaced after tiling is complete, not before, because the tile installation determines the final dimensions that the screen must fit against.

Tapware is removed before tiling and reinstated at the fix-out stage once tiles and grout have fully cured, which typically puts tapware reinstatement at the same time as vanity and other fixture connections.

Where a homeowner wants to change the position of the shower rose or add a shower niche or shelf during the retile, these changes require plumbing rough-in work to be completed before the substrate is prepared, which needs to be scoped and agreed before demolition rather than requested during the tiling stage.

How Long Does Retiling Take and What Does It Cost?

The total timeline for a bathroom retiling project in Melbourne runs from initial assessment and tile ordering through to the grout and silicone cure period at the end, and understanding the phases helps homeowners plan around the period when the bathroom is out of use.

The typical cost and time components of a bathroom retile in Melbourne are:

1. Strip and substrate preparation: The demolition and substrate assessment phase typically takes one day for a standard bathroom, longer if substrate replacement is required.
2. Waterproofing application and cure: Waterproofing takes one day to apply and requires one to two days of cure time before the inspection can be booked and before tiling can start.
3. Tiling labour: A standard Melbourne bathroom of six to ten square metres of wall and floor area typically takes two to three days of tiling to complete, depending on tile format and room complexity.
4. Grout and silicone, and cure period: Grouting is completed the day after tiling and requires 24 hours before the space is used and 48 to 72 hours before the shower is used.
5. Total on-site duration: Most bathroom retiling projects in Melbourne run three to five on-site working days from strip to grout, plus the cure periods at each end.
6. Tiling labour costs: Tiling labour in Melbourne typically runs from $80 to $160 per square metre depending on tile format, room complexity, and access.
7. Tile material costs: Tile prices vary widely, from $30 to $200 or more per square metre for the tiles themselves, independent of labour.

Consumer Affairs Victoria’s domestic building consumer guide outlines the rights and obligations of homeowners engaging licensed building trades for home renovations in Victoria, and is worth reviewing before signing any contract for retiling or broader bathroom work.

Need Help Planning Your Bathroom Renovation in Melbourne?

YoungConstruct manages bathroom renovations in Melbourne including full retiling projects, from the initial scope and tile selection through to waterproofing compliance, tiling, fix-out, and final handover.

All waterproofing work is completed by licensed trades with compliance certificates issued on completion, and every project is managed end-to-end by one licensed builder from the first site visit through to final sign-off.

Call 0428 400 258 or get in touch through the website to book your free onsite quote.

Final Thoughts on How to Retile a Bathroom

How to retile bathroom walls and floors correctly means understanding that the tile is the last layer in a sequence, not the first consideration.

Demolition reveals what is underneath. Substrate assessment determines what needs to be repaired before waterproofing can begin. Waterproofing is applied, inspected, and cured before any tile goes down. Tiling follows. Grout and silicone cure before the bathroom is used again.

Every step in that sequence exists for a reason, and the bathroom renovations that deliver a result lasting ten or fifteen years before any attention is needed are the ones where each step was done correctly and in the right order.