Are my old vinyl floor tiles asbestos?

They may be. Asbestos was used as a binder in Australian vinyl floor tiles made from the 1950s through the 1970s — CSR's Vinylflex was still being marketed in 1979 — and installation continued until around 1990. Asbestos content in these tiles ran roughly 20 to 45 per cent. They were made in squares, rectangles, planks and strips, plain or imitating terrazzo, marble and woodgrain, and they turn up most often in kitchens, laundries, bathrooms and the floors of built-in cupboards.

The tiles are gone but there is black glue on the slab — is that asbestos?

Quite possibly, and it is the part people miss. Paint-on flooring adhesives — particularly the black bitumen-based ones — were commonly reinforced with asbestos, and some floors also had an asbestos felt underlay beneath the tiles. So a floor can test positive after every tile has been lifted. If you have black residue on a slab or on floorboards in a pre-1990 home, treat it as suspect and have the residue sampled, not just the tile.

Can I sand or lift old vinyl floor tiles myself?

Sanding, grinding or buffing a floor that might contain asbestos is one of the worst things you can do with it — it converts a bonded material straight into airborne dust, and it contaminates the whole room. We do not publish removal instructions for this work. If a pre-1990 floor is coming up as part of a renovation, have it tested first: the result decides whether it is an ordinary floor job or licensed asbestos work, and that is a much cheaper question to answer before the demolition than after it.

What Do Asbestos Vinyl Floor Tiles Look Like?

Test the floor, not the tile

An old vinyl tiled floor is a stack of up to four materials, and asbestos can be in any of them, independently:

The tile itself — asbestos was added to the vinyl resin as a binder, at roughly 20–45% of the product.
A backing layer on the tile — some products carried asbestos in a backing rather than in the tile body.
The adhesive — paint-on flooring adhesives, particularly the black bitumen-based ones, were commonly reinforced with asbestos.
The underlay — asbestos felt, or in some floors a sheet of asbestos cement, laid over floorboards to give a flat bed.

This is why a negative tile result is not a clear floor. A tile can test clean while the black glue holding it down does not. If you are testing a pre-1990 floor, the sample needs to cover the layers that are actually going to be disturbed — which usually means the adhesive as well as the tile.

What the tiles look like

There is no single appearance, which is exactly why the format and the date matter more than the pattern:

Small, hard, thin tiles laid in a grid — noticeably more rigid and brittle than modern vinyl, which flexes. Old thermoplastic tiles snap rather than bend. The size is the single most useful thing you can measure: the classic tile is 9 inches, about 230 mm, square, while modern vinyl is 300 mm or larger.
Squares are the classic, but the products were also made as rectangles, feature planks and strips, so a plank floor is not automatically newer.
Patterns imitating terrazzo, marble and woodgrain, alongside plain solid colours. Speckled marbled greys, greens, browns and creams are the familiar Australian look.
Damaged edges and corners showing exposed fibre bundles, and tiles lifting at the corners where the adhesive has let go.
Black residue visible at the joints or where a tile is missing — see below.

Sheet vinyl and linoleum from the same era can also contain asbestos, in the material or in a backing, so a continuous roll floor is not a safer finding than a tiled one.

Dates and brands

Asbestos vinyl flooring was manufactured in Australia through the 1950s to the 1970s. CSR's Vinylflex was still being marketed in 1979, and stock kept being laid until around 1990. Brand names on these products include Vinylflex (CSR), Kentile, Vinylcraft (Nairntile), Dunlop Vinyl, Royal Flexyl, Supervinyl (Nylex) and Armstrong Cork.

Practically, that means a kitchen, laundry or bathroom floor that has not been touched since the 1980s is a candidate, and one laid after about 1990 almost certainly is not. Renovation history matters more than the age of the house — a 1920s cottage re-floored in 1970 has the 1970 problem.

Where they are in a Sydney home

Kitchens and laundries — the two most common rooms by a wide margin.
Bathrooms and toilets, often under later tiling rather than removed first.
The floors of built-in cupboards and pantries, where the original floor survives untouched long after the rest of the room was redone.
Hallways and sunrooms in post-war housing.
Under carpet or floating floors — the most common way people discover them, mid-renovation.

Commercial premises are the other half: the product guide lists offices, shops, cafés, restaurants, commercial kitchens, hospitals and government buildings, which is much of Sydney's older strata and retail stock. See commercial asbestos removal for how that runs around a trading business.

The black adhesive and the underlay

If the tiles are already gone and you are looking at black, tarry residue on a concrete slab or on floorboards, treat it as suspect. Bitumen and asphalt-based flooring adhesives were commonly reinforced with asbestos fibres, and the black ones are the usual offenders. The same applies to bituminous membrane sheeting used under floors for waterproofing or sound-deadening.

Underneath a tiled floor over timber, you may also find asbestos felt or a sheet of asbestos cement laid as a levelling bed. Manufacturers supplied the felt underlay and the adhesive as part of the system, so where you find one you often find the other.

The practical rule: on a pre-1990 floor, whatever you are going to disturb is what needs to be identified. Lifting tiles disturbs the adhesive. Levelling a slab disturbs the residue. Pulling up floorboards disturbs the underlay.

The one thing never to do

Never sand, grind, buff or shot-blast a floor that might contain asbestos — and that includes grinding old adhesive off a slab to prepare it for new flooring. Abrasive methods take a bonded material and convert it directly into airborne dust, throughout the room, in minutes. It is the single most damaging thing done to these floors, and it is done most often by people who were being conscientious about surface preparation.

Alongside that:

Do not dry-scrape tiles up with a floor scraper or a rotary machine.
Do not use a heat gun on old adhesive.
Do not sweep or vacuum the debris — domestic vacuums pass fibres straight through.
Do not tile, screed or glue a new floor over an unidentified one without knowing what is underneath, because the next person to lift it inherits the problem.

We do not publish removal instructions for this work. What NSW law permits an unlicensed person to do is covered on the asbestos licensing page.

How it gets confirmed

A NATA-accredited laboratory analysing samples under AS 4964-2004. For a floor, tell whoever takes the sample what you intend to do to it, so the right layers get sampled — a tile-only sample answers a narrower question than most renovations ask. See asbestos testing, or asbestos inspection if a whole property is being stripped and you need a register rather than a single result.

What removal involves

Intact vinyl tiles are bonded asbestos, so this is normally non-friable removal work. It is, however, slow non-friable work: tiles bonded to a slab with black mastic come up one at a time in a confined room, and the adhesive residue has to be dealt with as well. That is why the cost guide shows floor tiles at a higher indicative rate per square metre than roof sheeting, despite being a smaller and simpler-looking job.

Where a floor has been sanded, ground, or is otherwise degraded to loose material, it may be assessed as friable — see friable vs bonded asbestos. For the removal itself, see asbestos removal, and for renovation and strip-out sequencing, demolition and strip-out.

Where this information comes from

Dates, asbestos content, brand names, formats and the adhesive and underlay detail are from the national Asbestos Product Guide (opens in a new tab) published by the Asbestos and Silica Safety and Eradication Agency, and from asbestos.nsw.gov.au (opens in a new tab).