Floating Floor vs Glue Down: Which Suits Your Home?

A floating floor is joined board to board and rests on an underlay without being fixed to what’s underneath. A glue-down floor, also called direct stick, is bonded to the slab or subfloor with flexible flooring adhesive. Glue-down feels firmer and quieter underfoot and is the standard way to lay herringbone. Floating is faster, has no adhesive to cure, and is how click laminate is always installed. Which one you should have depends on the board, the subfloor and, in an apartment, the building’s rules.

How each method works

With a floating floor, the boards lock to each other, either through a click profile or with glue run along a tongue and groove joint. The finished floor sits on an underlay as one large sheet. Nothing holds it down except its own weight and the skirting or scotia around the edge, which covers a gap left at every wall so the floor can expand and shrink with the seasons.

With a glue-down floor, the installer spreads adhesive over the slab with a notched trowel and presses each board into it. Once the adhesive cures, board and slab behave as one. There is no soft layer in between, although some adhesive systems also act as a moisture barrier and some apartment jobs use an acoustic mat under the glue.

And on a timber subfloor?

Plenty of houses in Melbourne’s east have timber floors on stumps and joists, or particleboard sheeting upstairs. Tongue and groove boards can be fixed over these with adhesive and fixings through the tongue, so nothing shows on the surface. It behaves much like a glue-down floor: solid, with no give from an underlay. Floating over a timber subfloor is also possible if the old floor is flat and firm.

How they feel and sound underfoot

This is the difference most people notice first. A floating floor has a small amount of give. On a good underlay over a flat slab you mostly won’t feel it, but in hard-soled shoes you will hear a lighter, slightly hollow note than on a glued floor. Where the slab has a dip, a floating board flexes as you step on it, and that is where clicking and creaking usually start.

A glued floor sounds and feels heavier, closer to the old solid boards many people grew up with. If you’ve lived on a solid timber floor and liked it, glue-down is the nearer match.

Apartments add a second question: how much noise reaches the people below. That is mostly down to the underlay or acoustic mat, and to what your owners corporation requires. Both methods can be used in apartments, but the acoustic performance comes from the tested combination of board and underlay, not from the method alone. Our guide to soundproof flooring for apartments goes through this in more detail.

Which method suits your subfloor

The subfloor narrows the choice before taste comes into it. This is how it usually plays out on the jobs we measure.

Situation	Usual method	Why
Ground-floor concrete slab in a house	Glue-down for engineered timber, floating for laminate	Glue gives the solid feel; laminate is designed to float
Apartment slab	Set by the building rules, often floating over acoustic underlay	Impact noise to the unit below decides it
Particleboard or ply upstairs	Fixed tongue and groove, or floating	Both work if the sheets are firmly fixed and flat
Old boards on joists	Fixed over, or floating after flattening	Cupped or loose boards have to be dealt with first
Existing tiles in good condition	Floating, if the extra height works	Gluing to tile depends on the adhesive maker’s rules
Herringbone on any subfloor	Glue-down	Each block is set individually to hold the pattern

On concrete, both methods need a moisture test first. A floating floor goes over a moisture barrier film, and a glued floor may need a barrier primer or an adhesive rated for the job. Our post on laying a timber floor on a concrete slab covers testing and levelling step by step.

Flatness matters for both

People sometimes assume glue will take up an uneven slab, but it doesn’t. Adhesive fills small texture in the concrete, but a dip is still a dip, and a board glued across it can end up hollow underneath, which you hear as a dull knock when you walk over it.

Floating floors are less forgiving again. A floating board spanning a low spot moves every time you step on it, and over months that movement wears the joint. With click laminate the click itself can break. Manufacturers set a flatness limit over a given distance, and the installer checks against it with a long straight edge.

Longer, wider boards need a flatter base than short ones, so a 2200 mm wide board shows problems that a shorter plank might ride over. Grinding high spots and filling low ones with levelling compound is part of the preparation on most jobs, and it is explained on our floor removal and subfloor preparation page.

What changes the price

We don’t publish prices, because the method is only one line on the quote. It does affect several of the other lines, though, so here is what to look for when you compare quotes.

1. Materials under the board. Floating means underlay plus a moisture film on concrete. Glue-down means adhesive, and sometimes a primer or barrier. Both add to the cost, and the rated products for apartments cost more than basic ones.
2. Labour time. Gluing is slower than clicking boards together, and herringbone is slower again because every block is set by hand.
3. Preparation. Both need a flat, clean base. If levelling is left out of a quote, it usually comes back as a variation once the carpet is up.
4. Curing time. Glued floors need time before heavy furniture goes back, which can matter if you’re living in the house or have a move-in date.
5. Trims and breaks. Long floating runs may need expansion breaks at doorways, which adds trims. Glued floors can often run further without them.
6. Future removal. Lifting a floating floor is quick. Lifting a glued one means scraping and grinding adhesive off the slab. That is a cost for whoever replaces the floor in twenty years.

Ask for the install method to be written on the quote. If two quotes use different methods, you are not comparing the same job.

Repairs and water damage

Boards can be damaged in everyday life, for example by a dropped cast-iron pan, a leaking fridge line or a dog at the door frame. How each floor handles a repair is worth knowing before you choose.

On a floating click floor, a damaged board can be reached by unclicking rows from the nearest wall, or cut out and replaced with a modified board. On a glued floor, the installer cuts the damaged board out, cleans the old adhesive off and glues a new one in. Both are routine for an experienced installer. Both go much better if you kept a few spare boards from the original batch, because colour varies between production runs.

Water behaves differently too. Under a floating floor there is a thin layer of underlay and film, and water from a slow leak can travel across it before it shows at the surface. A glued floor has no such gap, so damage tends to stay closer to where the water came in. Neither method makes timber or laminate waterproof. Please wipe up spills and have leaks fixed quickly.

If the boards are engineered timber with a decent wear layer, the floor can be sanded later whichever way it was laid, as long as it is firmly installed. We explain the limits in can you sand engineered timber flooring.

How our range is usually laid

Every board in our range comes with the maker’s installation instructions, and those decide what is allowed. As a general guide:

Board	Joint	Usual method
Engineered European oak plank and wide board, 15 mm, 4 mm oak wear layer	Tongue and groove	Glued to a slab, or fixed over a timber subfloor
Engineered oak herringbone, 900 × 150 × 15 mm	Tongue and groove	Glued down
Engineered Blackbutt, Spotted Gum and Victorian Ash, 14 mm, 3 mm wear layer	Tongue and groove	Glued to a slab, or fixed over a timber subfloor
Laminate, 12 mm, 2260 × 236 mm	Välinge 5G click	Floating on underlay
Hybrid, 7 mm or 9 mm with attached 2 mm underlay	Unilin click	Floating

Some tongue and groove engineered boards can also be floated with glue in the joints where the manufacturer allows it, which can suit an apartment with strict acoustic rules. We can let you know whether that is an option for the board you like. You can browse the engineered oak range and the laminate range to see the full specs.

Next step: get the method on the quote

You don’t need to decide this on your own. At a free measure and quote we look at the subfloor, check the flatness, ask about apartment rules and heating, and recommend a method with the reasons written down. The quote then shows the underlay or adhesive, preparation and labour as separate lines, so you can see what the method costs you. You can read how a job runs from delivery to clean-up on our supply and installation page.

If you’d like to feel the difference first, you’re welcome to visit the showroom at 2/1386 Toorak Road, Camberwell, or call 1300 690 160 and let us know what’s under your current floor.