What “hollow” and “popping” tiles are
- Hollow tiles make a dull, drum-like sound when tapped, because there is an air gap between the tile and the screed beneath.
- Popping or tenting tiles go further: a row of tiles lifts into a ridge, sometimes with a sudden loud crack, and may split.
Both are common in Malaysian condos and terraces, especially on large, sunny floors and in older buildings.
Why it happens
- Thermal expansion. Tiles heat up and expand faster than the concrete slab beneath — strong afternoon sun through glass doors makes this worse.
- Poor adhesive coverage. Tiles laid on a few dabs of mortar (“spot-bonding”) or on adhesive that dried before the tile went on have weak spots.
- No movement joints. Large floors need flexible joints at the perimeter and in the field so tiles can expand; tight tiling wall-to-wall leaves nowhere to go.
- Moisture beneath the tiles from leaks or a damp screed weakens the bond.
- Building movement as a new structure settles in its first years.
Is it dangerous?
A hollow sound on its own is usually not urgent, but keep an eye on it. Lifting, cracked or tented tiles are a trip and cut hazard — keep children and elderly family members away, and avoid stepping on raised edges until they are repaired.
Repair options
| Situation | Typical repair |
|---|---|
| A few hollow tiles, not lifted | Remove and re-bed those tiles with full adhesive coverage |
| A ridge of popped tiles | Remove the lifted rows, clean back the screed, re-lay with movement joints |
| Widespread hollow tiles across a room | Relay the floor, or overlay new tiles only if the old ones are firmly bonded |
| Hollow tiles plus damp | Find and fix the moisture source first (often a leak), then re-tile |
Injecting adhesive at the edges of hollow tiles is sometimes offered as a quick fix. It can help with very small voids, but it rarely restores a full bond across the tile, so problems often return. Keeping a few spare tiles from the original batch makes matching repairs much easier.
What it costs in Kuala Lumpur
| Job | Typical price |
|---|---|
| Hollow / popped tile repair (small area) | RM80 – RM250 |
| Re-grouting | RM3 – RM6 per sq ft |
| Hacking old tiles (plus debris disposal) | RM2 – RM4 per sq ft |
| Floor tiling labour (standard sizes) | RM4 – RM8 per sq ft |
| Large-format tiles (600×1200 mm and up) | RM7 – RM12 per sq ft |
See our tile installation service and the full price guide.
New condo? Use the defect liability period
If your unit is newly handed over, hollow and popping tiles are a common defect claim. Report them to the developer in writing, with photos and a floor plan marking the tiles, within the defect liability period (commonly 24 months from vacant possession) — before you renovate over them.
How to prevent it in a new tiling job
- Full adhesive coverage on the back of every tile (back-buttering large tiles).
- Perimeter gaps hidden under skirting, plus movement joints on large floors.
- Levelling clips for large-format tiles.
- Waterproofing and a dry, sound screed beneath wet areas.
Frequently asked questions
Why do floor tiles suddenly pop with a loud crack?
Heat makes the tiles expand faster than the concrete slab, and with weak adhesive or no movement joints the stress builds until the tiles lift in a ridge — often with a bang. It is common in Malaysia on sunny floors.
Can I just glue a hollow tile back down?
Injecting adhesive helps only with small voids. A lasting repair removes the tile, cleans the bed and re-sets it with full adhesive coverage — which is why keeping spare tiles is useful.
How much does it cost to repair popped tiles in KL?
A small area of hollow or popped tiles is typically RM80–RM250. Relaying a larger area is priced per sq ft — around RM4–RM8 for standard tiles plus hacking and materials.
Written by the Wanisa Renovations team in Kuala Lumpur, based on our day-to-day work in KL homes. Prices are guide ranges; your quote is confirmed before work starts.