Map the hollow area
We sound out the floor to establish the extent of the void, since the size and location determine whether it needs work at all.
Flooring Problems
Hollow-Sounding Floor
A hollow sound means the floor is not fully supported underneath — whether that matters depends entirely on what kind of floor it is.
- Kuala Lumpur & Selangor
- Hollow-Sounding Floor
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What This Problem Means
Understanding Hollow-Sounding Floor
A clear, honest explanation of what is happening so you know what you are dealing with.
When you tap or walk on a floor and it sounds hollow, you are hearing a void between the surface you are standing on and the structure beneath. Air is a poor conductor of sound, so a drummy note tells you the two are not in continuous contact. Where that void came from, and whether it is a problem, depends on the floor type.
For a floating floor — SPC, vinyl or laminate over an underlay — a degree of hollow sound is completely normal and is not a fault at all. The plank is deliberately not bonded to the subfloor. What is not normal is a distinct hollow patch in an otherwise consistent floor, because that points to a dip in the subfloor. For tiles, hollowness is a more serious sign: it means the adhesive bond has failed or was never fully achieved, and hollow tiles crack and lift over time.
The short answer
Hollow-Sounding Floor
A hollow sound means the floor is not fully supported underneath — whether that matters depends entirely on what kind of floor it is.
We explain the cause and the fix, not just the symptom.
Common Causes
What usually causes Hollow-Sounding Floor
Understanding the cause helps you know why it happened and what the right fix is.
An uneven subfloor leaving a dip that the flooring bridges.
Levelling compound that has cracked or broken up beneath the floor.
Underlay that has compressed, torn or shifted during installation.
For tiles, insufficient adhesive coverage — spot-bonding rather than a full bed.
Adhesive bond failure over time, often accelerated by moisture.
Moisture beneath the floor that has degraded the underlay or the bond.
Normal floating-floor acoustics, which is not a defect.
Warning Signs
Warning signs to look out for
Spotting these signs early can often prevent a small problem from becoming a larger repair.
One clearly hollow area in a floor that sounds solid elsewhere.
A soft or springy feel when you step on the hollow spot.
The hollow area growing over time.
Cracked or loose tiles within a hollow-sounding zone.
Creaking or clicking that accompanies the hollow sound.
Possible Solutions
How we can fix it
The practical approaches we take to resolve this problem — from a targeted repair to a fuller solution.
Distinguish normal from defective
For floating floors we will tell you honestly when a hollow sound is simply how the floor is built and needs nothing done.
Lift and level the subfloor
Where there is a genuine dip, the flooring is lifted and the subfloor levelled so the surface is fully supported.
Re-bed hollow tiles
Hollow tiles are lifted and re-laid on a full adhesive bed, because a hollow tile will eventually crack under load.
When to Call a Professional
When professional help is needed
Some problems are worth handling early, and some should always be left to a professional. Here is when to get in touch.
The hollow area feels soft or springs underfoot.
Tiles within the hollow zone have cracked or come loose.
The hollow patch is spreading.
The hollowness appeared after a leak or a spill.
You are not sure whether what you are hearing is normal for your floor type.
Related Renovix Service
The service that handles this
Hollow-Sounding Floor is handled by our Flooring team. The related services below are often part of the same job.
Sub-Services
The work that fixes Hollow-Sounding Floor
These are the scopes we carry out for this problem. Each one has its own page explaining the work, what is included and what changes the cost.
- SPC Flooring InstallationView details
Under Flooring
- Vinyl Flooring InstallationView details
Under Flooring
- Floor Hacking & RemovalView details
Under Flooring
- Floor Repair & Plank ReplacementView details
Under Flooring
Our Process
How We Deal With a Hollow Floor
The first job is deciding whether there is a problem at all, because for floating floors there frequently is not.
- Step 01
Sound the floor
We tap across the area to map exactly where the hollowness is and how far it extends.
- Step 02
Identify the floor build-up
We establish whether it is a floating floor, a glued floor or tile, since each has a different acceptable standard.
- Step 03
Lift and correct where needed
Where a genuine void exists, the surface is lifted, the subfloor levelled or the tile re-bedded on a full adhesive bed.
- Step 04
Reinstate and re-check
The floor is relaid and sounded again to confirm the void has gone.
Property Types
Property Types We Help With
Subfloor quality is the main variable, and it differs markedly by property age and type.
Terrace houses
Ground-floor slabs are often slightly dished in the middle of rooms, which shows up as a central hollow.
Semi-detached & bungalows
Larger floor areas make level variation more likely across a single continuous run.
Condominiums & apartments
Screeds laid over structural slabs vary in quality; hollowness near a wall often means the screed has debonded at the edge.
Shoplots & commercial
Heavy point loads over a hollow area accelerate cracking, so hollow tiles matter more here.
Older properties
Original screeds may have broken down in places, and a hollow patch can be the first visible sign.
Service Areas
Serving Kuala Lumpur & Selangor
We assess and repair hollow-sounding floors across Kuala Lumpur and Selangor.
Kuala Lumpur
The federal capital — heritage shophouses, mid-century landed estates, older flats and a dense high-rise belt, all within one city.
Selangor
Malaysia's most developed state — from 1950s Petaling Jaya and royal Klang to fast-growing corridors like Puchong, Kota Damansara and Cyberjaya.
- Petaling Jaya
- Subang Jaya
- Shah Alam
- Puchong
- Klang
- Selayang
- Gombak
- Ampang Jaya
- Kajang
- Seri Kembangan
- Cyberjaya
- Putrajaya
- Kota Damansara
- Sungai Buloh
- Rawang
- Semenyih
- USJ
- Bandar Sunway
- Bandar Utama
- Mutiara Damansara
- Damansara Perdana
- Ara Damansara
- Bandar Sri Damansara
- Bangi
- Serdang
- Balakong
- Bandar Baru Klang
- Sepang
- Setia Alam
- Bandar Kinrara
- Batu Caves
- Bandar Mahkota Cheras
Every area has its own guide
Local housing stock, common problems and practical service notes for neighbourhoods and towns across the Klang Valley.
Not sure if we cover your area? Ask us — we serve most Klang Valley locations.
FAQs
Hollow-Sounding Floor — Frequently Asked Questions
Straight answers to the questions customers ask us most about this problem.
My SPC floor sounds hollow everywhere. Is the installation bad?
Almost certainly not. SPC, vinyl and laminate are floating floors — they sit on an underlay and are deliberately not bonded to the subfloor, so a consistent hollow or slightly drummy sound across the whole floor is exactly how they are built. What would concern us is one distinct hollow patch in an otherwise even-sounding floor, which suggests a dip underneath.
How serious is a hollow tile?
More serious than a hollow floating floor, because a tile relies on full contact with its adhesive bed for strength. A hollow tile is unsupported, so it flexes under foot traffic and eventually cracks or works loose. A single hollow tile in a low-traffic corner can often be monitored; hollow tiles in a walkway are worth re-bedding.
Can the hollow spot be filled without lifting the floor?
For tiles there are injection techniques, but they are not reliable in every situation and we would not present them as a certain fix. For a floating floor, filling is not possible without lifting, because there is no route to the void. In most cases lifting the affected area and levelling the subfloor properly is the repair that lasts.
Will a hollow floor get worse?
A hollow area that is caused by a fixed dip in the subfloor tends to stay much the same. One caused by adhesive failure or by moisture usually does spread, because the same condition keeps acting on the surrounding area. If the hollow patch is growing, that is a reason to investigate rather than wait.
Does an underlay stop the hollow sound?
A better-quality or thicker acoustic underlay does reduce the drummy sound of a floating floor noticeably, and it is worth specifying if the sound bothers you. It will not fix a hollow caused by an uneven subfloor, though — that needs levelling before the floor goes down.
Knowledge Hub
Guides that explain this further
Background reading on cost, materials and what the work involves.
Related Problems
Problems that are often linked
These issues frequently appear together in Kuala Lumpur and Selangor homes.
Lifting or Separating Floor Planks
Planks that lift, gap or peak into a ridge are nearly always telling you about the installation rather than the flooring product.
View problemSqueaky or Creaking Floor
A squeak is friction — two surfaces rubbing that should not be. It is annoying rather than dangerous, but it usually points to something worth correcting.
View problemHollow Tile Problems
A hollow tile is a sign that the bond beneath has failed. Renovix detects and fixes hollow tiles before they lift, crack or let water through.
View problemGet a Free Quote
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Describe what you are seeing and where the property is located, and we will advise on the next step.
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