Loose or Hollow Tiles in New Homes — What They Mean During a Building Inspection
- ClearScope Building Inspections
- Mar 12
- 7 min read
Updated: Mar 15
Homeowners completing a final walkthrough of their new home often begin tapping tiles out of curiosity and notice something unexpected, a tile that sounds hollow compared with the surrounding tiles. This can raise immediate concerns.
Is the tile loose?
Was it installed incorrectly?
Should it be repaired before handover?
During new build stage inspections and Practical Completion Inspections (PCI) across Melbourne growth areas such as Tarneit, Truganina, Clyde North, Officer and Donnybrook, hollow sounding tiles are something inspectors observe from time to time.
In many situations the tile installation remains stable and performs normally for many years. In other cases, a hollow sound may indicate that the tile adhesive beneath the tile did not fully bond during installation.
Understanding why hollow tiles occur, and how inspectors assess them, helps homeowners determine whether the issue is cosmetic, within tolerance, or something worth raising with the builder before settlement. This guide explains how hollow tiles form, how building inspectors test tile adhesion during inspections, and when repairs may be recommended in new homes.
Independent inspections provide a second set of experienced eyes on construction quality throughout the build. Our article Construction Stage Inspections — What Independent Inspectors Check explains how inspectors review workmanship, alignment and installation quality during each stage of a new home build.
What Are Loose or Hollow Tiles in New Homes?
A hollow tile is a tile that produces a noticeably different sound when tapped lightly compared with surrounding tiles. When tiles are installed correctly, tile adhesive bonds the tile firmly to the substrate beneath. This creates a solid surface with consistent support.
If small voids exist beneath the tile where adhesive coverage was incomplete, the tile may produce a hollow or “drummy” sound when tapped. The presence of a hollow sound does not automatically mean the tile is loose or defective.
Tile installation generally occurs during the internal finishing stages of construction once waterproofing and plaster works have been completed. Our article How a New Home Is Built in Australia — From Slab to Handover explains how tiling fits within the overall building process.
During building inspections, inspectors typically assess tiled areas by:
tapping tiles lightly to compare sound consistency
checking for movement when gentle pressure is applied
examining grout joints for cracking or separation
visually reviewing tile alignment and surface levels
In many cases hollow tiles remain completely stable and perform normally throughout the life of the installation. However, when hollow areas are widespread or accompanied by movement, the installation may require further assessment.
Finish quality becomes particularly important during the final inspection stages of a new home build. Alongside tiling observations, inspectors also review paint finish quality throughout the home. Our article Paint Defects in New Homes — What Should Be Fixed Before Handover explains what homeowners should look for before handover.
Why Tiles Sometimes Sound Loose or Hollow Tiles in New Homes
Tile installation involves several layers working together:
substrate or screed
tile adhesive
tile surface
A hollow sound typically occurs when one of these layers does not fully bond during installation. Several construction factors can contribute to this.
Incomplete Adhesive Coverage
Tile adhesive should normally cover most of the tile base to provide full support. If insufficient adhesive is applied during installation, small air gaps can remain beneath the tile. These gaps can create the hollow sound homeowners sometimes notice when tapping tiles.
Adhesive Skinning Before Tile Placement
Tile adhesive begins to dry once it is spread across the surface. If tiles are not placed quickly enough after adhesive is applied, the adhesive can begin to skin over. This reduces its ability to bond properly to the tile. When this occurs, parts of the tile may not fully adhere to the substrate.
Uneven Substrate Surfaces
Tiles rely on a relatively even substrate surface for consistent adhesive contact.
If the screed or substrate beneath the tiles contains minor variations, adhesive coverage can vary beneath the tile surface.
These conditions sometimes relate to the floor variations discussed in our article Uneven Floors in New Homes — What Is Within Tolerance?, which explains how inspectors assess floor levels during construction.
Rapid Installation Across Large Estates
Across Melbourne’s expanding estates such as Manor Lakes, Clyde North and Donnybrook, tiling trades often work across multiple homes simultaneously. While most installations are completed to a high standard, the pace of construction across large developments can occasionally result in minor adhesive inconsistencies beneath isolated tiles.
Where Inspectors Most Commonly Find Hollow Tiles
Hollow tiles can occur in several tiled areas throughout a new home. However, independent inspectors most frequently identify them in the following locations.
Shower Floors
Shower recess floors are one of the most technically complex tiled areas in a home.
Tiles must follow the floor fall toward the waste while maintaining consistent adhesive coverage. If installation sequencing or adhesive application varies slightly, hollow tiles can occasionally occur.
Inspectors also check whether the shower floor drains correctly. Our article Water Pooling in Shower — Is the Floor Fall Incorrect? explains how inspectors assess shower floor gradients.
Bathroom Wall Tiles
Large format bathroom wall tiles sometimes produce hollow sounds due to the way adhesive is applied to vertical surfaces. In most cases these tiles remain firmly bonded and do not require repair. Inspectors also check grout joints for cracking, which may indicate movement.
Our article Tile Grout Cracking in Bathrooms — Cosmetic Issue or Waterproofing Problem? explains how inspectors interpret grout cracking in tiled areas.
Kitchen Splashbacks
Kitchen splashbacks are typically installed over plasterboard surfaces. If adhesive is applied unevenly, hollow sounds may occasionally occur in isolated tiles. These installations generally remain stable unless tile movement develops.
Hallways and Living Areas
Large tiled floors in living areas or hallways can occasionally contain isolated hollow tiles due to slight variations in adhesive coverage beneath the tile surface. If the tiles remain firm and the grout remains intact, this situation is often considered cosmetic.
How Inspectors Test Tiles During Building Inspections
During PCI inspections and independent stage inspections, inspectors review tiled areas as part of the broader workmanship assessment.
Typical inspection methods include:
lightly tapping tiles to identify sound variation
checking tile edges for alignment differences
inspecting grout joints for cracking
confirming tiles remain firm when pressure is applied
Tile alignment is also reviewed. Uneven tile edges, commonly referred to as tile lipping, can sometimes occur alongside adhesive inconsistencies.
Our article Tile Lipping in New Homes — When Tiles Sit Uneven explains how inspectors assess tile alignment and what may be considered acceptable during construction.
Inspectors also observe whether hollow sounds occur across isolated tiles or across larger tiled sections, which may indicate a broader installation issue.
Many tiled areas are inspected again during practical completion inspections before handover. Our article New Build Stage Inspections in Armstrong Creek, Victoria explains how independent inspectors review installation observations during several construction stages across new housing estates.
Tiling observations are often documented during the later stages of a build before handover. Our article New Build Stage Inspections in Charlemont, Victoria explains how stage inspections allow inspectors to review installation quality during several construction milestones.
Are Hollow Tiles Always a Defect?
Not necessarily. Many hollow tiles remain completely stable and continue performing normally without any structural or waterproofing issues. When assessing hollow tiles, inspectors generally consider several factors.
Homeowners sometimes describe hollow sounding tiles using different terms such as “drummy” tiles or “loose” tiles. While these descriptions often refer to similar observations, the underlying causes can vary. Our guide Drummy Tiles in New Homes — Are They a Defect? explains how inspectors distinguish between hollow sounding tiles and tiles that have actually lost adhesive bond.
Situations Where Hollow Tiles May Be Acceptable
Hollow tiles may fall within normal construction tolerances when:
the tile remains firm and does not move
grout joints remain intact
the hollow area is small or isolated
the tile surface remains level with surrounding tiles
In these situations the installation may still fall within normal workmanship tolerances. Our article What Does “Within Tolerance” Actually Mean in a New Home Inspection? explains how inspectors interpret workmanship standards during construction.
Situations Where Repairs May Be
Recommended
Builders may consider repairing hollow tiles when:
several tiles sound hollow in the same area
the tile moves when pressure is applied
grout joints repeatedly crack
tile alignment is affected
hollow tiles occur in waterproofed shower floors
In these situations the builder may remove and replace the affected tiles before handover.
How Hollow Tiles Are Normally Repaired
When hollow tiles require repair, the process is usually straightforward.
The builder will typically:
remove the affected tile carefully
clean away old adhesive
apply fresh tile adhesive
reinstall a replacement tile
re-grout the surrounding joints
These repairs are generally easier to complete before handover while tiling trades remain active on site.
How Independent Inspections Help Identify Tile Installation Issues
Many homeowners choose to organise independent inspections at key construction milestones so workmanship can be reviewed before the next stage of building proceeds. Our guide New Build Stage Inspections — Complete Guide explains how slab, frame, pre-plaster and fixing stage inspections help identify issues early in the construction process.
Stage inspections and PCI inspections often identify minor installation observations that homeowners may not immediately notice.
These may include:
tile alignment variations
grout performance
isolated hollow tiles
floor level variations beneath tiles
Identifying these observations before settlement allows homeowners to discuss them with their builder while trades are still attending the site. This helps ensure any reasonable repairs can be addressed before handover.
FAQ
Why do tiles sometimes sound hollow in a new home?
Tiles may sound hollow if adhesive coverage beneath the tile was incomplete during installation, leaving small voids beneath the tile surface.
Are hollow tiles considered a building defect in Australia?
Not always. If the tile remains firm and the hollow area is small, the installation may still fall within acceptable building tolerances.
Can hollow tiles become loose later?
Most hollow tiles remain stable. However, if adhesive coverage is very limited, the tile may eventually loosen over time.
Should hollow tiles be repaired before handover?
If hollow tiles move, crack grout or occur across large areas, builders often repair them before handover.
Do hollow tiles affect waterproofing?
Hollow tiles alone do not usually affect waterproofing, but inspectors may review them closely in shower floors where water exposure is highest.
Final Thoughts
Loose or hollow sounding tiles are a relatively common observation during new home inspections. In many situations they simply reflect small variations in adhesive coverage beneath the tile and do not affect long-term performance.
However, when hollow tiles occur across large areas, move under pressure or appear in sensitive areas such as shower floors, further review may be appropriate. Independent building inspections help identify these details early so homeowners can better understand the quality of installation before moving into their new home.
Comments