Floor Levelling and Screeding Services VIC 2026 - Get Quotes

Why Victorian Floors Go Out of Level

Timber stumps account for more uneven floors in Melbourne than anything else. A very large share of the city is weatherboard and period housing built on stumps and not a slab, and those stumps carry the bearers that carry the joists that carry the floor. When a stump settles into the ground, rots at the point where it meets the soil, or is pushed up and down by reactive clay, the floor above follows it. Rot concentrates at ground level rather than throughout the stump. The zone right at the soil surface stays damp and has oxygen available, which is where timber breaks down fastest, so a stump can look sound from the subfloor while having lost much of its section at the base. That is why settlement often appears suddenly after years of nothing.

Reactive clay affects stumped houses and slab houses differently but drives both. Under a slab, seasonal swelling and shrinking moves the whole plate and shows up as slope and cracking. Under a stumped house, the same movement lifts and drops individual stumps by different amounts, which produces a floor that undulates instead of tilting evenly. Perimeter stumps move more than internal ones for the same reason walls crack at corners. Soil around the edge of a building is exposed to rainfall and evaporation while soil underneath is sheltered, so moisture content swings much further at the perimeter and the stumps there rise and fall more. Floors frequently slope away toward external walls as a result.

Poor subfloor ventilation accelerates everything on a stumped house. Blocked or insufficient vents keep the subfloor damp, which speeds up stump rot, encourages borer and rot in bearers and joists, and keeps the ground beneath wetter than it should be. Improving airflow underneath falls to subfloor repairs and ventilation. Slab floors go out for their own set of reasons.

Settlement from poorly compacted fill, movement from reactive clay, an uneven original pour, or a slab that was finished to a standard adequate for carpet but not for tile all produce floors that need correcting before a hard floor covering goes down. Old floors were frequently never flat to begin with. Board floors laid a century ago were built to a different expectation, patched over decades as plumbing and wiring went through them, and sanded repeatedly, so the surface reflects that history rather than any single failure. Bringing an old board floor back is a job for floor sanding and polishing.

How Flat Is Flat Enough

The answer depends entirely on what is going down, and that is the question to settle before getting quotes. Flooring manufacturers publish tolerances as a maximum deviation over a stated length, and those specifications are what a warranty is written against, so the floor covering decides the preparation rather than the other way around. Carpet over underlay is the most forgiving surface covering available. The underlay absorbs a good deal of unevenness and the carpet drapes over what remains, which is why an old floor that has always looked acceptable under carpet suddenly becomes a problem when somebody decides to replace it with something hard. Floating laminate sits in the middle and depends on the product. A floating floor bridges small dips because it is not fixed down, though a dip beyond what the system tolerates produces flexing underfoot, clicking as the joints work, and eventually failure at the locking edges.

Vinyl plank and sheet vinyl are considerably less forgiving than most people expect. Those products are thin and conform closely to whatever is beneath them, so every hump, dip, trowel mark and patch telegraphs through to the visible surface, and on a sheet product the light across the floor makes it obvious. Large format tile is the tightest requirement of the common finishes. A long rigid tile bridges a dip and sits on its high points, which produces lippage between tiles, drummy tiles that sound hollow underfoot, cracked grout and eventually cracked tiles, so tile work generally demands the flattest substrate, meaning the surface the flooring is laid onto. Laying the tile itself is a separate trade covered at tiling services.

Engineered and solid timber sit between laminate and tile. Glued down engineered boards follow the substrate closely and need a flat base, while a floating installation tolerates more, and the manufacturer specification for the particular product is what settles it. For board and plank products, see timber and laminate flooring. Getting this wrong is the most expensive mistake available on a flooring job. A flooring installer who arrives to find the substrate outside tolerance either walks away, proceeds and voids the warranty, or adds preparation as a variation, and all three cost more than settling the requirement beforehand.

Self Levelling Compound or Traditional Screed

Self levelling compound is the default for most residential preparation work. A cementitious powder is mixed to a fluid consistency, poured onto a primed substrate and spread with a gauge rake, and it flows out to find its own level before setting, producing a flat surface suited to flooring. Ardex, Mapei and Sika are among the brands commonly specified for this work in Australia, and each publishes its own depth range, primer requirements and moisture limits. How deep the product can go is what limits where it can be used. Standard compounds work in a range from a couple of millimetres up to around twenty, deep fill products extend that further, and beyond that the cost climbs steeply because the material itself is expensive per bag compared with sand and cement. The speed is what makes it workable in a house people are living in.

A compound can commonly be walked on within a few hours and take flooring within a day or so depending on the product and conditions, which compares favourably against a traditional screed that needs far longer. Skipping the primer is the usual reason a compound fails to bond. The substrate has to be clean, sound and primed with the correct product for that surface, because compound poured onto dusty, contaminated or unprimed concrete does not bond and lifts later, and leaving it out is the most common shortcut in this trade. Traditional sand and cement screed suits depth and falls. A semi dry mix is laid and compacted to a screeded finish, it works economically at greater thicknesses, and it can be laid to a deliberate fall instead of flat, which is what wet areas need. Screed takes considerably longer to cure, and people underestimate that.

A sand and cement screed needs substantially longer before flooring can go down, commonly measured in weeks rather than days depending on thickness, and laying an impermeable floor covering over a screed that has not dried is a reliable way to produce a failure. Grinding is the option where the floor is high and not low. Isolated humps, trowel ridges or a slab edge sitting proud can be ground down instead of building the whole floor up to meet them, which is faster and cheaper where the problem is localised. Machines for taking high spots off a slab come from concrete grinding.

Moisture Testing Before Anything Goes Down

Moisture in a slab causes more flooring failures than unevenness does, and it is the step most often skipped. Concrete holds water long after it appears dry on the surface, and an impermeable floor covering laid over a slab that is still releasing moisture traps it at the bond line, where it breaks down adhesives and lifts the floor. The symptoms appear weeks or months later rather than immediately. Vinyl lifting at the edges, timber cupping across the boards, adhesive that has gone soft and stringy, a mouldy smell, or tiles sounding drummy underfoot are all the same problem showing up in different materials. Victorian winters make this worse than most people expect. Cold damp months slow drying considerably, ground moisture beneath a slab is higher, and a reading taken in July on a slab that would test fine in February can differ enough to change the recommendation, so the season the test was taken in matters.

A new slab needs substantial drying time and the rule of thumb surprises people. Concrete releases moisture slowly and a slab commonly needs months instead of weeks before it is ready for an impermeable covering, which is why flooring is one of the last trades on a new build and why rushing it produces claims. Older slabs are not automatically dry either, particularly without a vapour barrier. A slab poured without a membrane beneath it keeps drawing ground moisture upward year after year, which means the age of the slab tells you very little on its own and only a reading settles it.

Moisture barriers applied on top are the answer where readings are high. A liquid applied epoxy or similar system seals the slab surface so the covering can go down, and it is a standard product rather than an exotic one, though it needs specifying and pricing instead of discovered on the day. Surface applied barrier systems fall to waterproofing services. Insist on a documented result with the date and method. That record is what a flooring manufacturer will ask for if a warranty claim is ever made, and a verbal assurance that the slab seemed fine is worth nothing in that conversation.

Timber Floors and Subfloors

Levelling a timber floor works differently from levelling a slab and the distinction matters. A timber floor moves, flexes and breathes, so pouring a rigid cementitious compound directly onto old boards is a poor idea unless the system is specifically rated for it and the floor has been made adequately stiff first. Overlaying with sheet material is the common approach on board floors. Plywood or a proprietary underlay sheet fixed down over the boards creates a stable, continuous surface for the new flooring, and packing beneath the sheets corrects local dips as it goes. Fibre cement sheet underlay is the usual choice where tile is going down. Tiles need a rigid substrate that does not flex, and a timber floor sheeted appropriately and fixed at the specified centres provides that, whereas tiling directly onto boards produces cracked grout and drummy tiles within a year.

Deflection is the property that decides whether a timber floor can take a hard covering at all. A floor that visibly moves when somebody walks across it will crack tile and stress glued flooring regardless of how flat the surface is, so stiffening the subfloor comes before any surface work. Adding bearers, or noggins fixed between the joists to stop them twisting, is carpentry work, found at carpentry services. Individual boards that have cupped, lifted or been patched need attention before sheeting over them. Planing high spots, refixing loose boards and replacing damaged sections gives the sheet something even to sit on, and skipping it means the unevenness simply transfers upward. Replacing damaged boards first falls to floorboard repair and replacement.

Subfloor condition is worth checking while the floor is open. Bearers and joists with rot, borer damage or inadequate support explain a great deal of surface unevenness, and finding that after the new floor is down is the worst possible timing. Where the boards themselves are staying as the finished floor, sanding does the job that levelling would otherwise be asked to do. A period board floor being restored is sanded and finished rather than covered, which addresses surface irregularity without adding height or hiding the timber. Sanding a floor flat instead of levelling over it is a job for floor sanding and polishing.

Getting the Order Right

Structural correction comes before surface levelling and that is the single most important sequencing point on this page. Levelling compound poured over a floor that is still moving because stumps are failing produces a flat floor that goes out again, and the compound has added cost and height for nothing. Restumping is the obvious case on Melbourne's period housing. Where stumps have settled or rotted, replacing them corrects the floor levels structurally and frequently reduces the amount of surface levelling needed afterward to very little. Replacing the stumps themselves falls to restumping and reblocking.

Slab movement needs establishing before anybody levels over it. Where a slab has settled or a house shows cracking alongside the uneven floor, an assessment determines whether the movement has stabilised, because levelling an actively moving slab has the same problem as levelling over failing stumps. For a structural opinion, engage a structural engineer. Plumbing and services belong before the floor goes down. Any pipework, wiring, underfloor heating or drainage that needs to run through or beneath the floor has to be finished and tested first, because opening a newly levelled floor is expensive and rarely finishes invisibly.

Wet areas follow their own sequence entirely. Falls to the waste, then the waterproofing membrane, then the screed or bedding, then the tile, and getting that order wrong on a bathroom is both a leak risk and a compliance problem. Membranes and falls in a wet area are handled at bathroom waterproofing. Moisture testing sits between preparation and flooring rather than at the start. Test after any levelling work has cured, because the compound or screed itself introduces water, and a reading taken before that work means very little by the time the floor goes down.

Floor Levelling Across Victoria

Inner and middle Melbourne is dominated by stumped housing and that shapes the work. Fitzroy, Northcote, Brunswick, Coburg, Preston, Yarraville and the surrounding suburbs carry a huge stock of weatherboard and period homes on stumps, where restumping and subfloor work frequently precede any surface levelling. The western and northern growth corridors present slab problems instead. Melton, Point Cook, Werribee, Craigieburn and Wollert sit on reactive clay with slab on ground construction, so the issues are slab movement, uneven pours and moisture instead of stumps. Bayside and the inner east mix both housing types. Period homes on stumps sit alongside newer slab construction and extensive renovation work, which means a levelling contractor in those suburbs deals with timber subfloors one week and slabs the next.

The outer east and hills bring sloping blocks and split levels. Cut and fill construction, homes stepped down a slope and subfloors that vary in height across a building all complicate levelling, and the transition between a slab section and a timber section within one house is common. Regional Victoria carries a large stock of older stumped housing. Ballarat, Bendigo, Geelong and the goldfields towns have extensive Victorian era housing where stumps, subfloor ventilation and board floors are the dominant considerations rather than slab preparation.

What Floor Levelling Typically Costs

Self levelling compound commonly runs $35 to $90 per square metre depending on the depth required, the product used and how much preparation the substrate needs first. A single room frequently lands between $900 and $2,500 once preparation, priming and minimum charges are counted. Depth drives that figure more than area does. Compound is expensive per bag, so a floor needing an average of fifteen millimetres costs far more than one needing three, and it is why grinding high spots down is often better value than building the whole floor up to meet them. Sand and cement screed generally prices lower per square metre at depth, commonly $45 to $100 including labour, and becomes the sensible choice once the correction exceeds what compound handles economically. You pay for the lower material cost in waiting time.

Moisture barrier systems add meaningfully to a job and belong in the budget upfront. A liquid applied barrier over a slab with high readings can add $25 to $60 per square metre, and discovering the need for it after quoting is a common source of variations. Sheeting a timber floor typically runs $45 to $95 per square metre including packing, sheet material and fixing. Where the subfloor needs stiffening or boards need repair first, that is separate work and worth quoting separately so the two are visible.

What to Look Out For

Be cautious about any levelling quote that does not ask what floor covering is going down. The tolerance requirement comes from the flooring product, so a contractor who has not asked cannot know what standard they are working to, and level the floor is not a measurable commitment. Ask specifically about priming and what product will be used. Compound poured onto unprimed or contaminated concrete debonds and lifts, it is the most common shortcut in this trade, and the failure appears months later once the flooring is already down. Insist on moisture testing with a documented result before flooring is laid. That single piece of paper is what a warranty claim turns on, and no reputable flooring installer objects to being asked for it.

Question a proposal to level a floor on a stumped house without looking underneath. Where stumps have settled or rotted, surface levelling treats the symptom, and a contractor who has not been into the subfloor has not diagnosed the floor. Check insurance and consumer protections before committing. Site safety obligations fall under WorkSafe Victoria, guarantees on the work you buy are administered by the ACCC, and building work in Victoria is regulated by the Building and Plumbing Commission.

How to Get Useful Quotes

Name the floor covering going down and the specific product if you have chosen one. That determines the tolerance the substrate has to meet, and it is the single most useful piece of information you can give. Measure the worst deviation rather than describing it. A long straight edge or a string line across the room with a tape measure at the biggest gap gives a figure in millimetres, and that number decides both method and price. Say whether the floor is a slab or timber on stumps. The two involve entirely different methods and different trades, and it is the first thing an operator needs to know.

Mention any previous flooring failure and how it presented. Lifting at the edges, cupping or drummy tiles point at moisture instead of levels, and knowing that changes the investigation before anybody quotes. Give the room dimensions and say how many rooms are involved. Area sets the base figure, and grouping several rooms into one attendance is nearly always cheaper than doing them separately. For a look across the whole property, try building inspection.

Have each quote state the tolerance being worked to, the method and depth, the priming system, whether moisture testing and any barrier are included, and what happens if the substrate turns out worse than expected. Pinning down those five is what turns a pile of quotes into a genuine comparison. Anything structural underneath belongs with structural repairs. That last clause about an unexpected substrate is the one worth reading closely.