SPC Flooring Lifting or Bubbling
Causes, Checks & Fixes (2026)

What lifting, peaking and bubbling look like

SPC (stone-plastic composite) is a rigid plank that is usually laid as a floating floor: the planks click to each other, not to the slab, and the whole floor sits loose on an underlay. That is why it can go down over old tiles in a day, and it is also why it can lift. When a floating floor has no room to move, or the base under it changes, the stress comes out at its weakest point.

• Doming or tenting: a raised area in the middle of the room that springs when you step on it.
• Peaking: two planks pushing up against each other at a joint, forming a small ridge.
• Bubbling: a soft, raised patch, most often on glue-down floors where the adhesive has let go.
• Gapping: joints opening at the ends of planks, often in the same room that lifts at another time of day.
• Hollow drumming: a planked area that sounds empty underfoot and moves slightly.

Symptom and likely cause

Most lifting has one of five causes. Match what you see before deciding on a fix.

No expansion gap: the most common cause

SPC is more stable than laminate, but it still moves with temperature. ClickBina's vinyl and SPC cost guide says to leave a 6–10 mm gap at all fixed edges and cover it with skirting or quarter-round trim. Its SPC supply-and-install guide names the missing gap as the mistake it gets called out to: a floor jammed against the walls has nowhere to go and lifts in the middle, and that is almost always a rushed install rather than a bad product.

The gap can also be lost after installation. Skirting nailed down through the planks, a door frame or a kitchen plinth set on top of the floor, grout or silicone run into the edge, or heavy built-in furniture standing on the planks all pin a floating floor. Once pinned, it cannot expand and it buckles somewhere else.

Sun and heat cycling

A room with a big west-facing window and no blinds puts the floor through a heat cycle every afternoon. The SPC guide warns that direct, sustained sun on a rigid plank floor is heat cycling, and heat cycling is what opens gaps at the ends of planks. The same room can peak in the afternoon and gap in the morning.

Blinds, curtains or window film cut the heat that reaches the floor. If the floor was laid with no gap, shading alone will not fix it, but it stops a correctly laid floor being pushed to its limit.

Moisture from below and water through the joints

SPC is water-resistant, not a waterproofing system. The SPC guide explains that in bathrooms, wet kitchens and areas with a floor trap, water gets through the joints to the slab and stays there, and you get smell and mould rather than a swollen floor. The vinyl cost guide adds that moisture rising from below the slab can cause adhesive failure or mould between the subfloor and the planks.

Ground-floor rooms on a slab-on-ground are the ones at risk. If a wall darkens in the monsoon or the room smells musty, deal with that first; ClickBina's rising damp guide covers the diagnosis. Re-laying planks over a damp slab only buries the problem again.

An uneven subfloor or doubled underlay

A rigid plank bridges small hollows, but it does not correct a floor. The vinyl cost guide says any high spots over 3 mm in a 1.8 m radius will cause click-lock joints to separate or create hollow sounds underfoot. The planks flex every time someone walks the same line, and the joints work loose and can peak.

The other hidden cause is underlay. The SPC guide says underlay is either pre-attached to the plank or laid as a separate sheet, not both, because doubling up makes the floor spongy and stresses the joints. Check the plank backing before blaming the product.

Bubbles on a glue-down floor

Some SPC and vinyl floors are fully glued to the slab instead of floating. They do not dome in the same way; instead, a patch lets go and forms a soft bubble. The usual reason is moisture below the adhesive or a dusty, poorly prepared slab. The vinyl cost guide notes that peel-and-stick tiles are not recommended for permanent use in Malaysia's heat because the adhesive can fail.

A glued floor is harder to repair, because planks cannot simply be unclicked and lifted. That is one reason the SPC guide calls floating the default for homes.

Diagnosing it yourself, step by step

1. Note when it lifts: all day, or only in the afternoon sun.
2. Lift one length of skirting or beading and look for a gap between the planks and the wall.
3. Look for anything pinning the floor: nails through planks, a door frame, a kitchen plinth, built-in furniture, silicone at the edge.
4. Check the edges and the room for a musty smell, dark marks or a wall that darkens after rain.
5. Lay a long straightedge across the lifted area in several directions and look for dips and humps.
6. Check whether the planks have underlay attached, and whether a separate underlay sheet was also laid.
7. Keep a spare box of planks if you have one; the SPC guide notes batch colours drift.

Fixes, from simple to a full re-lay

Because a click-lock floating floor can be lifted plank by plank, the SPC guide notes that a damaged plank can be swapped without disturbing the rest, which is why keeping a spare box matters.

What the fix costs

These are ClickBina's published SPC ranges (indicative 2026, Klang Valley). A fix that only frees the edges costs far less than one that needs the floor lifted and the slab levelled.

If new planks are needed and your spare box has run out, a new batch may not match exactly, so re-lay whole rooms rather than patches where you can.

How ClickBina can help

WhatsApp us your job details for a quote: which room, when the floor lifts, whether it is a floating or glued floor, whether it is on the ground floor, and whether you have spare planks. ClickBina is an experienced KL & Selangor contractor for whole-house refurbishment and trade coordination, and supplies and installs interior finishes by budget and use case. We reply within the hour, and the price we agree is a flat price with no hidden charges. A site visit is RM150, waived if you go ahead.

Sources & methodology

• ClickBina SPC flooring guide — floating installation, the expansion gap, underlay, heat cycling, wet areas, repairs and the SPC price table.
• ClickBina vinyl and SPC flooring cost guide — the expansion gap width, acclimatisation, subfloor flatness, moisture from below and adhesive failure.
• ClickBina rising damp guide — diagnosing damp in ground-floor rooms.

How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina guides named above; they are indicative Klang Valley ranges for 2026, not fixed rates.