Flooring

Flooring is the finish layer people walk on: carpet, vinyl sheet and tiles, timber (solid, engineered and parquet), laminate, ceramic and stone tiles, polished concrete and resin floors, laid over screeds, underlays and the structural floor. Flooring is judged on wear and appearance, but its failures also include slips and trips, acoustic complaints between apartments, moisture-driven failures that start in the slab below, and hazardous materials in older vinyl tiles and adhesives.

In offices the base-building floor finish usually belongs to the owner and tenant flooring to the tenant; in apartments flooring is usually the owner's, with by-laws controlling changes.

The engine should treat flooring by space: the same finish can be fine in a bedroom and a hazard in a wet entry.

What shortens life:

• Moisture from slabs without vapour barriers, leaks and wet cleaning.
• Missing movement joints in tiled floors.
• Heavy traffic and grit.
• Poor substrate preparation.

Floor life depends on traffic, grit control at entries, cleaning practices and moisture in the substrate. A good floor laid on a damp slab can fail within months, while a modest floor on a dry, well-prepared substrate with good matting can last decades.

Moisture from below

Moisture rising through concrete slabs debonds vinyl and resin, swells and cups timber, and causes adhesives to fail; old slabs without vapour barriers and new slabs not dried before flooring are the usual causes. Timber also cups from leaks and humidity.

Tile cracking and tenting

Tiled floors laid without movement joints at perimeters and across large areas crack, debond and lift in a ridge (tenting) as the slab and tiles move with temperature and shrinkage.

Impact noise

Hard floors in apartments, especially timber and tile laid over carpet areas without acoustic underlays, transmit footsteps to the unit below, generating complaints and by-law disputes.

Slips and trips

Polished and glazed surfaces become slippery when wet; lifted tiles, curled carpet edges and changes in level trip people.

Wear

Traffic paths wear carpet, scratch timber and wear through coatings; grit tracked in accelerates wear.

Hazardous materials

Older vinyl floor tiles and their adhesives commonly contain asbestos; they are safe in place but release fibres when broken up or sanded.

Substrate failures

Self-levelling compounds that crack or debond, screeds that are weak or uneven, and timber subfloors that move transmit their defects through the finish: cracks reflect through vinyl and tiles, and uneven substrates cause trips and premature wear.

Cleaning damage

Wrong cleaning chemicals strip coatings, polish stone, soften adhesives and leave slippery residues.

On site

• Timber boards cupped or gapped; vinyl bubbling or lifting.
• Tiles cracked, hollow-sounding or ridged.
• Worn carpet paths and frayed tile edges.
• Hard floors in upper apartments with complaints below.
• Older vinyl tiles of small square formats.
• Slippery entries and wet areas.

In the records

• Moisture test results before flooring.
• Strata approvals and by-laws for hard floors.
• Asbestos register.
• Slip incidents.

• Cracks in vinyl or tiles following a straight line, reflecting a joint or crack in the slab below.
• Dark discolouration or adhesive bleeding at vinyl seams, signs of moisture.
• Gaps between timber boards widening in dry weather and closing in wet.

• Grit and water tracked inside entries, wearing and dulling floors.

Flooring failures concentrated near external walls, wet areas or at ground level point to moisture; failures across the whole floor point to substrate preparation or the product.

Findings are graded by what they demand: safety (can hurt someone now), failure (failed and damaging the building), condition (distress present and progressing), lifecycle (renewal due on age and exposure), deadline (a regulator or ordinance sets the date), check (investigate before sizing works) and nil (cosmetic or stable).

Flooring findings rarely reach safety grade except for trip and slip hazards and disturbed asbestos tiles; most are condition and lifecycle items, but moisture-driven failures recur until the cause is fixed.

A building surveyor or flooring specialist leads, with an asbestos assessor for older floors and an acoustic consultant where noise is the issue.

• Condition survey of flooring by area: wear, lifting, cracking, cupping and trip edges.
• Moisture testing of slabs by in-situ relative humidity probes before new flooring, and of timber floors where cupping occurs.
• Tile inspection: tapping for hollow tiles, checking for movement joints.
• Slip resistance testing of floors at entries, wet areas and ramps.
• Acoustic testing of impact sound between apartments where complaints exist.
• Asbestos sampling of older vinyl tiles and adhesives before removal.

The report should give causes of failure, safety items, and replacement or repair recommendations.

Before replacing a failed floor, establish the cause, or the replacement will fail the same way.

For apartment noise disputes, test the floor as built rather than relying on product data, because installation details such as perimeter isolation decide the result.

• Moisture mitigation with surface membranes or proper drying before new flooring.
• Movement joints cut into tiled floors, with lifted tiles relaid.
• Acoustic underlays under hard floors in apartments, required by by-laws.
• Slip treatments or replacement finishes in wet and entry areas, with entry matting.
• Trip hazard repair: relay lifted tiles, restretch or replace carpet, fit transition strips.
• Refinishing timber floors rather than replacing them.
• Licensed removal of asbestos-containing tiles and adhesives, or leaving them encapsulated under new flooring.
• Replacement on cycle with products suited to the traffic and moisture conditions.

• Substrate repair: remove failed screeds and levelling compounds before new flooring.

• Entry matting long enough to remove grit and water, protecting floors throughout the building.

Flooring is priced by area. Moisture membranes add to the cost of new flooring but prevent repeat failures. Acoustic underlays add modestly. Asbestos removal adds licensed removal and clearance. Replacement in occupied buildings is staged, with furniture moves.

Safety items are immediate; replacement is lifecycle; repairs are repairs and maintenance; tenant-caused damage is recoverable.

Investigating moisture costs little compared with replacing a floor that fails twice.

Replacement in rental and hotel stock is timed with vacancies.

• Australia. Slip resistance classification follows AS 4586 with guidance in Standards Australia handbook HB 198; resilient flooring installation follows AS 1884; strata by-laws commonly require approval and acoustic underlays for hard floors; the National Construction Code sets sound insulation for apartment floors.
• United Kingdom. BS 8203 covers resilient floor coverings and BS 8204 screeds; Approved Document E covers sound insulation; the HSE slip assessment approach guides floor safety.
• United States. ASTM F2170 sets slab moisture testing; ANSI A326.3 slip resistance; the International Building Code sets impact insulation class for floors between dwellings; condominium rules often regulate hard floors.

In all three countries, apartment by-laws or rules often require owners to obtain approval and use acoustic underlays before laying hard floors.

• Moisture test results for recent flooring.
• Strata approvals and by-laws on hard flooring.
• Asbestos register covering floor tiles.
• Slip and trip incident records.
• Flooring warranties.

• Cleaning specifications.
• Substrate preparation records.
• Noise complaints from neighbours.

• Moisture records for the substrate.
• Records of leaks affecting floors.

• Product data for installed floors.