Vinyl Flooring in Singapore Flats: Thickness and Subfloor

Does vinyl flooring need an HDB permit in Singapore?

No. HDB's renovation guidelines for building works list "laying of vinyl finishes/ carpet/ linoleum" under floor finishes with permit required marked as No and the guidelines column marked as not applicable (HDB Renovation Guidelines for Building Works). That is a meaningful difference from replacement of ceramic, homogeneous, terrazzo, marble, parquet or timber and other tiles, which HDB marks as requiring a permit and subjects to a condition that the total thickness of floor finishes and screed must not exceed 50mm (HDB Renovation Guidelines for Building Works).

Two neighbouring rules in HDB's building works table still shape a vinyl job in a Singapore flat. HDB's conditions for laying floor finishes over existing floor finishes using adhesive only are that there should be only one layer of existing floor finishes including cement screed before the additional layer is laid, that the thickness of the floor finishes inclusive of the adhesive must not exceed 13mm, that no tampering of the floor trap is allowed, and that the work should not result in backflow or lateral seepage into the bedroom (HDB Renovation Guidelines for Building Works). Separately, for laying or replacing parquet, timber, laminated or bamboo flooring in flats with existing floor finishes, HDB states the work should not involve raising the floor as a platform, the usage of cement screed, or the hacking and removal of existing floor finishes (HDB Renovation Guidelines for Building Works).

One honest limit on reading HDB's table: HDB lists vinyl separately from both of those rows and attaches no conditions to the vinyl row, so it does not spell out how a cementitious levelling compound under vinyl should be treated. If your flat needs levelling before vinyl goes down, ask HDB or have your contractor confirm the method with HDB rather than assuming it is covered.

Thickness and wear layer are two different numbers

The number on a vinyl plank's box and the number that determines how long the floor looks new are not the same. Total plank thickness is the whole build-up, commonly around 2mm for a thin glue-down luxury vinyl tile up to roughly 6mm for a rigid core plank with attached underlay; it buys rigidity, some tolerance of minor subfloor irregularity, and a little impact sound reduction. The wear layer is the clear film on top, commonly somewhere between about 0.2mm and 0.7mm, and it is the only part of a vinyl plank resisting scratching and abrasion.

None of those thickness ranges are published by a Singapore authority — they describe what manufacturers sell, so the number that governs your floor is the one printed on the product's own data sheet. Suppliers sometimes quote the wear layer in mil rather than millimetres, and the conversion is fixed: one mil is 0.0254mm, so a 12 mil wear layer is roughly 0.3mm and a 20 mil wear layer is roughly 0.5mm. A 5mm plank with a thin wear layer will scuff faster than a 3mm plank with a thick one, which is why comparing quotations on plank thickness alone is the most common way Singapore homeowners buy the wrong floor.

Ask the vinyl supplier for the manufacturer's data sheet and read three lines on it: wear layer thickness, whether the product is rated for residential or commercial traffic, and the stated warranty period with its conditions. The warranty conditions are where installation requirements live, and they are the same requirements a good installer will insist on.

Click-lock or glue-down: your subfloor and your windows decide

Click-lock rigid core vinyl floats. The planks lock to each other and rest on the existing floor, usually over a thin foam or attached underlay, and nothing bonds them to the substrate. Floating floors are faster to lay, are easier to lift later, and bridge small irregularities better, but they must be given an expansion gap around the entire perimeter and around every fixed object, and that gap must stay free.

Glue-down luxury vinyl is bonded to the substrate with adhesive. Bonded vinyl is more stable under heat, does not need a perimeter expansion gap in the same way, and handles heavy point loads better, but it is far less forgiving of a poor substrate: every hump, dip and grout line telegraphs through a thin bonded plank, and lifting it later takes the adhesive with it.

In a Singapore flat the deciding factors between floating and bonded vinyl are usually sunlight and carpentry. A living room behind full-height west-facing windows heats a dark floating floor enough to matter, and bonded vinyl is the safer specification there. A flat with heavy built-in wardrobes, a kitchen island or a feature wall landing on the floor pushes the same way, because a floating floor pinned under fixed carpentry cannot move and will peak or gap somewhere else instead.

What the subfloor has to be before vinyl goes down

A subfloor under vinyl has to be flat, sound, dry and clean, in that order. Most manufacturers specify a flatness tolerance in their installation instructions — 3mm measured under a 2m straightedge is a common figure — and they write the warranty against it, so the tolerance in your product's own document is the one that counts.

Soundness matters as much as flatness when vinyl is going over existing tiles, which is the usual case in a Singapore resale flat. Tap the existing tiles across the whole area with a light metal object and listen: a drummy, hollow note means the tile has debonded from the screed. HDB's home care guide gives expansion and contraction of tiles because of thermal movement and water absorption as the reason tiles become dislodged or pop, and gives impact by a heavy object or different rates of expansion or contraction between the tile and substrate as the reasons tiles crack (HDB Home Care Guide, Floor Finishes). A hollow tile left under new vinyl becomes a soft spot, then a failed joint.

Dryness matters because vinyl is a vapour barrier. Laying an impermeable floor over a substrate holding moisture traps it, and in a Singapore flat the usual sources are a leaking floor trap, a failed kerb at a toilet doorway, or a washing machine that has been overflowing quietly for months. HDB's guidance on parquet describes hollow or bulged-up strips caused by water seeping underneath and causing loss of adhesion, and advises finding out the source of water seepage and preventing contact with water (HDB Home Care Guide, Floor Finishes). The physics under vinyl is identical.

Where vinyl actually fails in Singapore flats

At thresholds and wet edges

The joints of a click-lock vinyl floor are water-resistant, not waterproof, and the substrate underneath is neither. The failure pattern in a flat is a toilet or kitchen doorway where water crosses the threshold repeatedly, wicks under the plank edge, and has nowhere to evaporate to. The tell is a musty smell before there is anything visible, followed by a joint that feels soft underfoot.

Under fixed carpentry

A floating vinyl floor laid wall to wall and then loaded with a full-height wardrobe, a kitchen island or a stone feature is pinned in place. Movement that the perimeter gap was meant to absorb goes somewhere else, and the result is peaking in the middle of a room or an opened joint along a wall. The fix is a decision made before installation, not after: either bond the floor, or lay the carpentry first and fit the floor around it.

Along sun lines

Dark vinyl planks behind unshaded glazing in Singapore reach temperatures well above room ambient in the afternoon. Flexible vinyl expands more than rigid core, and the joint or edge nearest the glass is where the movement shows first. Blinds, a lighter finish in that zone, or bonded vinyl are the three usual answers.

Grout lines and dents

Thin glue-down vinyl over existing tiles will eventually show the grout grid, because the adhesive layer is not thick enough to bridge it. Point loads from thin furniture legs and appliance feet dent vinyl more readily than they dent tile, and the dents do not recover.

What actually drives the vinyl flooring price in Singapore

Suppliers quote vinyl flooring per unit area, but the installed cost in a Singapore flat is set by a handful of line items that are easy to leave off a headline figure. Wear layer grade and brand are the material driver. Click-lock versus glue-down changes both labour and preparation. Subfloor levelling is the single largest swing item and cannot be priced before someone has checked the existing floor. Skirting, whether new or reinstated, and scotia beading to cover the expansion gap, are separate. Doors usually need undercutting once a floor gains height. Removal and disposal of an existing floor finish, if there is one to remove, is separate again. Transition strips at thresholds are small in cost and large in consequence.

Real figures belong here once quotations are attached, not before: TO FILL: supply and lay click-lock rigid core vinyl, whole-of-flat, 4-room resale, TO FILL: supply and lay glue-down LVT per unit area, TO FILL: self-levelling and subfloor preparation, TO FILL: skirting supply and installation, TO FILL: door undercutting and transition strips, TO FILL: removal and disposal of existing floor finishes.

When comparing vinyl quotations, check whether the area quoted is the measured floor area or the material area including wastage, because plank layouts in a flat with corridors and bedrooms generate real offcut loss and the two figures are not the same.

Formaldehyde, adhesives and what the 2026 NEA rule does not cover

Indoor air quality is a common reason for choosing vinyl over engineered timber, and the Singapore rule behind that choice is narrower than the marketing around it. From 1 January 2026 the National Environment Agency requires interior paints sold in Singapore to contain no formaldehyde, defined as an in-can content below 0.01% weight for weight (NEA). That NEA regulation covers interior paint. It does not regulate the adhesives used in composite wood, in carpentry, or in flooring installation.

If emissions are the reason for your flooring choice, the only reliable evidence is the product's own test report — for the plank and, separately, for the adhesive if the floor is glued down. Ask the supplier for it in writing. A verbal claim that a floor is "formaldehyde free" is not covered by the NEA interior paint rule and is not verifiable from the packaging.

Living with a vinyl floor, and what happens at resale

Day to day, vinyl asks for less than tile: sweep or vacuum grit, damp mop rather than flood, and keep standing water off the joints. Furniture pads matter more on vinyl than on tile because the surface dents. Where a plank is damaged, a bonded floor can usually be patched in place, while a floating floor is repaired by unclipping from the nearest wall — which is a reason to keep spare planks from the same batch.

One planning point applies to HDB owners specifically. HDB's condition for laying a further floor finish over an existing one using adhesive is that there should be only one layer of existing floor finishes including cement screed before the additional layer is laid (HDB Renovation Guidelines for Building Works). A flat that already carries original tiles plus a bonded vinyl layer has used that allowance, so the next renovation is a removal job rather than another overlay. That is not a reason to avoid vinyl, but it is a reason to be honest with a buyer about what is underneath.

On choosing who lays the floor: under the Housing and Development (Renovation Control) Rules an HDB flat owner must engage a contractor listed in HDB's Directory of Renovation Contractors, and contravention is an offence carrying a fine not exceeding S$5,000 (Renovation Control Rules). Listing is not a quality signal, because HDB states that it does not endorse nor guarantee the quality of listed contractors' works and that engaging them is a private contract between the flat owner and the contractor (HDB, Looking for Renovation Contractors). Noble Interior Design Pte. Ltd. is listed in HDB's Directory of Renovation Contractors (DRC Ref: HB-12-5230A, UEN 201722629H) and is CaseTrust-accredited.

The rule, in the regulator's own words

A permit from HDB is required before hacking or altering any walls in a flat.

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— HDB, via MyNiceHome

The text above is quoted from MyNiceHome — HDB renovation guide; the link goes to the primary source so it can be checked rather than taken on trust.