Floor noise can be surprisingly disruptive. Footsteps from upstairs, chairs scraping across tiles, and conversations travelling between levels can all make a home feel louder than it should. In apartments, the same sounds can also lead to complaints from neighbours below.
The right way to soundproof a floor depends on the noise, floor structure and surface finish. A rug may soften sound inside a room, but meaningful floor soundproofing usually requires treating the path sound takes through the building.
What is the best way to soundproof a floor?
The most effective approach is a floor system that reduces vibration and blocks sound transmission. This may combine acoustic underlay, a dense barrier, insulation between joists or an isolated ceiling below.
Start by identifying the noise you want to control:
- Use resilient acoustic underlay to reduce footsteps, dropped objects and furniture movement.
- Add mass and seal gaps to control voices, television, music and other airborne noise.
- Insulate floor or ceiling cavities when sound is travelling between storeys.
- Use isolation methods when vibration is passing directly through joists, slabs or connected building elements.
No single material suits every floor. The complete assembly matters, including the subfloor, underlay, finish, perimeter and ceiling below.
Understand the type of floor noise first
Before choosing a product, work out what you can hear and where it is coming from. Floor noise generally falls into three categories.
Impact noise
Impact noise begins when something physically strikes or moves across the floor. Common examples include footsteps, children running, dropped objects, chairs moving and exercise equipment.
The impact makes the structure vibrate, and that vibration can travel through joists, slabs, walls and ceilings. This is why upstairs footsteps can sound much louder below.
Acoustic underlay is often the starting point. It creates a resilient layer between the floor finish and structure, helping to limit vibration transfer.
Airborne noise
Airborne noise includes voices, television, music and barking dogs. It travels through the air before reaching a floor, wall or ceiling and making that surface vibrate.
Reducing airborne noise generally requires mass, airtight construction and suitable cavity insulation. Products such as Sound-Stop 5 mass-loaded vinyl can add density to a floor assembly and help reduce sound transmission when they are installed as part of a suitable system
Flanking noise
Flanking noise bypasses the main soundproofing layer through perimeter gaps, wall cavities, penetrations, ductwork or connected joists.
This is an important detail because even a well-treated floor can underperform if sound can bypass it. Sealing junctions carefully and considering the surrounding walls and ceiling are essential parts of a complete solution.
If you are new to these concepts, SPW’s Soundproofing 101 guide explains the roles of sound barriers, absorbers and diffusers.
Can you soundproof an existing floor?
Yes, but your options depend on how much of the floor you can access.
If the surface is being replaced, you can usually install acoustic underlay or a larger system beneath the new flooring. This is the best opportunity to treat impact noise at its source.
If the floor must stay, rugs, runners and soft furniture can reduce reflected sound and soften some impacts. They are unlikely to stop significant noise travelling between levels.
With no access from above, the ceiling below may be treated with acoustic insulation, added mass and resilient channels or isolation clips.
For an existing floor, the first question should be practical: can you lift the floor finish, access the cavity, work from the ceiling below, or only add treatments on top? The answer will narrow the suitable options quickly.
The main ways to soundproof flooring
Install acoustic underlay
Acoustic underlay sits beneath the finished floor to reduce impact noise. It can suit many timber, vinyl, tile, laminate, bamboo, cork and carpet systems, although installation methods vary.
Not every underlay performs equally. Standard foam may improve comfort without delivering the noise control required in an apartment. Look at the tested complete floor build-up, not just a packaging claim.
AngelStep GOLD8 acoustic underlay is an Australian-made option designed to reduce impact noise through hard-surface floors. It combines a high-density sound absorber with cross-linked microcellular foams and can be used with floor finishes including timber, vinyl, tile, carpet and parquetry.
Before ordering, confirm compatibility with the floor finish, substrate, adhesives and installation method.
Add mass to block airborne sound
Impact isolation and airborne sound control are different jobs. If voices or music are travelling between floors, acoustic underlay alone may not be enough.
Adding a dense, flexible barrier can improve resistance to airborne sound. Mass-loaded vinyl may be installed over timber joists before the subfloor or incorporated elsewhere in a suitable build-up. Joins and perimeters need careful sealing.
Mass is particularly useful in lightweight timber construction, but it works best alongside cavity insulation and isolation rather than as a standalone fix.
Insulate the floor cavity
An empty cavity between timber joists can pass sound between levels. Acoustic insulation helps absorb energy within it.
Bradford SoundScreen acoustic insulation can be installed in internal wall, floor and ceiling cavities as part of a broader acoustic system. Insulation alone will not stop all floor noise, but it can improve the performance of an assembly that also uses mass, sealing and isolation.
Cavity treatment is easiest during construction or renovation, when the subfloor or ceiling lining is already open.
Decouple the ceiling below
When noise from an upper floor is heard in the room below, treating the ceiling can sometimes be the most practical option. Decoupling separates the plasterboard lining from the joists so less vibration passes directly into the ceiling surface.
Resilient channels can form part of a decoupled ceiling system. They are commonly paired with acoustic insulation, additional mass and careful perimeter sealing.
Installation detail matters. Screws passing through the channel into a joist create a rigid bridge. Lighting, vents and penetrations also need attention.
Seal gaps and junctions
Sound behaves a little like air. If there is a path through the structure, it can find it.
Check gaps around floor edges, skirting, pipework and ducts. Flexible acoustic sealant can accommodate movement better than rigid filler.
Sealing is not a substitute for underlay, insulation or added mass, but it helps those components work as intended.
How to soundproof a timber floor
Timber floors can transmit both impact and airborne noise, especially when they sit over open joist cavities.
For a new or lifted timber floor, a robust system may include:
- Acoustic insulation fitted between the joists.
- A dense sound barrier or suitable acoustic layer above the joists.
- A well-sealed and securely installed subfloor.
- Acoustic underlay beneath the finished boards.
- Perimeter isolation to prevent the floor from making hard contact with surrounding walls.
If existing boards are staying, rugs and runners can soften impacts. Repair loose or squeaking boards because movement creates extra noise.
Floating timber needs compatible underlay. Direct-stick timber may require a different tested system with suitable adhesives or an intermediate layer.
How to soundproof vinyl flooring
Vinyl is softer than tile and can be quieter underfoot, but thin vinyl laid directly over a hard substrate may still transfer considerable impact noise.
Luxury vinyl planks, sheet vinyl and hybrid products have different requirements. Some include attached backing; others need separate underlay. An attached layer may not satisfy a multi-storey building’s acoustic requirements.
For better vinyl floor soundproofing:
- Choose an acoustic underlay approved for the specific vinyl system.
- Confirm that the finished floor will remain stable under furniture and foot traffic.
- Check moisture and adhesive requirements.
- Avoid doubling underlays unless the flooring and underlay manufacturers approve the combination.
- Obtain test information for the complete floor system when strata approval is required.
The goal is to reduce vibration without affecting stability, joints or warranties.
How to soundproof a tiled floor
Tile is hard, dense and reflective. It can make impacts sound sharp inside the room and transfer vibration into the structure below.
An acoustic layer beneath the tile bed can help reduce impact noise, but it must be designed to support a rigid finish. Excess movement may contribute to cracked grout or tiles, so a general-purpose soft underlay is not suitable.
The system may need an acoustic mat, compatible adhesive, screed or fibre-cement layer. Wet areas also require careful waterproofing.
Because tiled systems are difficult and expensive to remove, confirm the acoustic, structural and waterproofing details before installation begins.
Rugs can help reduce echo and surface noise after the tiles are installed, but they will not provide the same level of impact isolation as a properly designed layer beneath the floor.
How to soundproof a carpeted floor
Carpet is generally the quietest common floor finish because its soft surface absorbs sound and cushions footsteps. A dense carpet with a quality acoustic underlay can provide strong impact-noise control in bedrooms, living areas and upper storeys.
For better results:
- Use an underlay selected for acoustic performance, not thickness alone.
- Cover as much of the floor as practical.
- Repair loose or squeaking subfloor sections before laying carpet.
- Treat the floor cavity if airborne noise is still travelling between levels.
- Seal major perimeter gaps and service openings.
Carpet and underlay may handle moderate footfall. Voices, bass or machinery passing through the floor may also require mass, insulation or decoupling.
Soundproofing apartment floors and strata properties
Flooring changes in apartments can affect the people living below, so approval and acoustic documentation are important.
Before replacing carpet with timber, vinyl or tile:
- Read the building’s by-laws and flooring requirements.
- Ask the body corporate, owners corporation or strata manager what approval is needed.
- Confirm the acoustic target for the complete floor and underlay system.
- Request relevant test documentation from the supplier.
- Check finished floor height, door clearances and transitions.
- Keep records of the approved products and installation method.
Do not choose underlay from a claimed decibel reduction alone. Laboratory results depend on the tested slab or subfloor, ceiling and finish. Results can differ in another assembly.
Strata schemes may impose conditions beyond relevant Australian building requirements. For compliance-sensitive work, speak with the strata manager and an appropriately qualified acoustic consultant.
How to choose the right floor soundproofing solution
A useful recommendation starts with the building. Consider these questions.
What noise are you trying to reduce?
Footsteps point towards impact isolation. Voices and music call for mass and airtightness. Speakers, gym equipment and machinery may need greater isolation.
Where can the work be completed?
Access from above is usually best for impact noise. Access below may suit airborne sound and ceiling decoupling. With neither surface open, expect more limited improvement.
What is the floor structure?
Concrete slabs and lightweight timber floors behave differently. The joist depth, cavity, subfloor, ceiling lining and surrounding walls all affect performance.
Which floor finish will be installed?
Timber, vinyl, tile and carpet place different demands on underlay. Thickness, strength, moisture, adhesives and finished height influence the choice.
Is tested performance required?
For apartments and commercial work, request testing that reflects the proposed build-up. Isolated product numbers do not guarantee the same result in every building.
Common floor soundproofing mistakes
Even good products can disappoint when the complete system is overlooked. Common mistakes include:
- Treating airborne and impact noise as the same problem.
- Buying underlay based only on thickness or a marketing claim.
- Installing hard flooring without checking strata requirements.
- Ignoring gaps, penetrations and flanking paths.
- Allowing the finished floor to make rigid contact with walls.
- Using incompatible underlay, adhesive or flooring combinations.
- Expecting rugs or acoustic panels to block sound between storeys.
- Covering one surface without investigating the rest of the sound path.
The best results come from choosing compatible components and installing them as one acoustic system.
DIY or professional floor soundproofing?
Some improvements are straightforward. Rugs, runners, furniture pads and minor gap sealing can be suitable DIY tasks. Experienced renovators may also be comfortable installing underlay beneath a floating floor when they follow the manufacturer’s instructions.
Tiled floors, direct-stick systems, structural changes, waterproofed areas and serviced ceilings may require qualified trades. Apartment projects may also need approval or acoustic testing.
Soundproof Warehouse supplies products Australia-wide and can help narrow the options. For complex or compliance-sensitive builds, the team can recommend an acoustic engineer when required.
Plan the whole floor system before you start
Good floor soundproofing starts with a clear diagnosis. Identify the type of noise, trace its path and choose a solution suited to the floor structure and finish. Acoustic underlay can be highly effective for impact noise, but airborne sound or structural vibration may also call for mass, insulation, sealing and isolation.
Planning the complete assembly early is easier than trying to fix a noisy floor after the finish has been installed.
If you need help choosing compatible products for timber, vinyl, tile or carpet, contact Soundproof Warehouse for practical guidance on your floor soundproofing project.
Frequently asked questions about floor soundproofing
What is the best material for soundproofing a floor?
There is no universal best material. Acoustic underlay is commonly used for impact noise, while mass-loaded vinyl, cavity insulation and decoupled ceilings can help with airborne sound. The right combination depends on the noise and floor construction.
Can acoustic underlay stop footsteps?
Acoustic underlay can reduce the vibration created by footsteps and other impacts. Results depend on the underlay, floor finish, substrate and installation details.
Can you soundproof a floor from below?
You can improve sound isolation by treating the ceiling below with insulation, added mass and a decoupling system. This may help with airborne noise and some vibration, but impact noise is generally most effectively treated near its source on the floor above.
Do rugs soundproof a floor?
Rugs soften footsteps and reduce reflected sound inside a room. They are useful for modest improvements, particularly on timber or tile, but they do not fully soundproof the floor structure.
Does floor soundproofing work in apartments?
Yes, a properly selected and installed acoustic floor system can reduce noise transfer. Check the building’s by-laws and approval process before changing the flooring, and use test documentation relevant to the proposed assembly.
Should acoustic underlay go above or below the subfloor?
It depends on the product and floor system. Many underlays sit between the subfloor and finished flooring, while other acoustic layers form part of a deeper build-up. Follow the product and flooring manufacturer’s installation requirements.
