Install Soundproofing And Bring An End To Noisy Neighbours

How to Reduce Noise Between Neighbouring Homes

Noise from an adjoining home can include conversations, televisions, music, footsteps, doors closing and household appliances. In flats and converted properties, sound may also travel from homes above or below.

Home soundproofing can help reduce this transmission, but it cannot guarantee that neighbouring activity will become completely inaudible.

The correct treatment depends on the type of noise, the building construction and the route through which the sound travels. Treating the most obvious wall without considering the surrounding floors, ceilings and openings may provide a smaller improvement than expected.

Identify the Type of Noise

Most noise between neighbouring homes involves airborne noise, impact noise or structure-borne vibration. Some situations include more than one type.

Airborne noise

Airborne noise initially travels through the air before reaching a wall, floor, ceiling, door or window.

Common examples include:

• Conversations and raised voices
• Televisions and gaming systems
• Music and speakers
• Dogs barking
• Household appliances

Reducing airborne noise normally involves adding suitable mass, improving airtightness and introducing separation between layers of the building construction.

Impact noise

Impact noise is created when something makes direct contact with the building. Footsteps, moving furniture, dropped objects and doors closing can transfer vibration through floors, joists, walls and ceilings.

This type of noise is generally best treated close to its source. A resilient floor system in the property above may be more effective than relying solely on a ceiling treatment below.

Structure-borne vibration

Washing machines, tumble dryers, speakers, pumps and other equipment may transfer vibration directly into the structure.

Isolation pads, anti-vibration mounts or changes to the way equipment is supported may be needed. Adding acoustic boards to a nearby wall will not necessarily solve vibration entering through the floor or connected structure.

Find the Main Transmission Path

The surface where noise sounds loudest is not always the route through which it first entered the room.

Possible transmission paths include:

• Party walls and internal partitions
• Floors and ceilings
• Timber joists and concrete slabs
• Chimney breasts and fireplaces
• Doors and communal hallways
• Loft spaces and ceiling voids
• Pipework, sockets and cable openings
• Ventilation ducts and grilles

Sound that bypasses the main separating surface through connected parts of the building is known as flanking transmission.

For example, voices may appear to pass through a party wall while some of the sound is travelling through the floor cavity or connected ceiling. Treating only the wall may therefore leave an important secondary route unchanged.

Reducing Noise Through a Party Wall

Where conversations, television noise or music pass through an adjoining wall, a suitable wall soundproofing system may help.

Depending on the original construction, a system may include:

• Acoustic insulation within a cavity
• Resilient bars or isolation clips
• An independent supporting framework
• Dense acoustic boards
• Flexible sealing around perimeter joints

The correct arrangement depends on whether the existing wall is masonry, blockwork, timber stud, metal stud or another construction.

Creating separation between the original wall and the new lining can help reduce direct vibration transfer. Rigid fixings that bridge resilient components can weaken the completed system.

JCW Silent Board Plus may form part of suitable wall or ceiling systems, but no single board should be expected to solve every neighbour-noise problem.

Noise from Neighbours Above

Noise from an upper property often combines airborne sound and impact vibration. Conversations and televisions may pass through the floor construction, while footsteps and moving furniture create direct structural vibration.

Where access to the upper floor is possible, a suitable floor soundproofing system may use:

• An acoustic underlay
• A resilient floor deck
• A floating floor construction
• Acoustic insulation between joists
• Additional dense layers within the floor

For impact noise, treatment to the floor where the activity occurs is normally preferable because it reduces vibration before it enters the main structure.

A floating floor must remain isolated from surrounding walls. Rigid contact around the perimeter can create an acoustic bridge through which vibration continues to travel.

Ceiling Soundproofing from Below

Where the floor above cannot be treated, ceiling soundproofing may help reduce voices, televisions and some impact noise.

Possible systems include:

• Acoustic insulation between joists
• Resiliently mounted ceiling boards
• Isolation clips and channels
• An independent ceiling beneath the original structure

An independent ceiling can provide greater separation but reduces the available room height.

Lighting, alarms, ventilation grilles and cable routes must also be incorporated carefully. Each penetration can weaken acoustic performance and may require suitable fire-rated treatment.

A ceiling system may reduce the direct sound path while some impact vibration continues through adjoining walls and structural connections.

Noise Travelling Up from a Property Below

Conversations, television noise and music can also travel upwards through floors.

Gaps between floorboards, uninsulated joist cavities and openings around heating pipes can all contribute to the problem.

Depending on the floor construction, treatment may combine acoustic insulation, additional mass and resilient floor layers.

Floor work may increase the finished level and affect doors, thresholds, skirting boards, radiator pipes and fitted furniture. These practical details should be considered before installation begins.

Doors and Communal Hallways

In flats and shared buildings, noise may enter through a lightweight entrance door or travel along a communal corridor.

A soundproof door may be appropriate where the doorway has been identified as a significant transmission route.

The performance of the complete doorset depends on:

• The mass and construction of the door leaf
• The door frame
• Perimeter seals
• The threshold or drop seal
• Ironmongery and closers
• Accurate installation and adjustment

A specialist door will provide limited benefit if most of the sound is travelling through the surrounding wall, floor, ceiling or ventilation system.

Alterations to flat entrance doors must also preserve any required fire and escape performance.

Noisy Appliances May Need Source Treatment

A washing machine, tumble dryer or other appliance may create airborne noise as well as structural vibration.

Before considering building work, check whether the appliance:

• Is level and stable
• Has worn or damaged components
• Touches surrounding cabinets or walls
• Is positioned on a weak or uneven floor
• Could use a suitable isolation mat or mount

Maintenance or source isolation may provide more value than upgrading an unrelated wall.

Equipment should remain safely supported, ventilated and accessible for servicing.

Seal Gaps and Service Penetrations

Small openings can reduce the performance of an otherwise substantial wall, floor or ceiling.

Common weak points include:

• Pipe and cable penetrations
• Electrical sockets
• Board edges and perimeter joints
• Gaps beneath skirting boards
• Openings into floor and ceiling cavities
• Door and window frames

A flexible acoustic sealant may help close suitable perimeter joints as part of a complete system.

Sealant alone will not soundproof a weak wall, floor or ceiling. Its role is to close small air paths that could otherwise undermine the main construction.

Service penetrations may also require tested fire-stopping products. Acoustic work must not compromise the fire resistance of the building.

Ventilation Routes Must Remain Functional

Sound can travel through ducts, vents and other openings that allow air to pass.

These openings should not simply be blocked. Homes require suitable ventilation for indoor air quality, moisture control and the safe operation of some appliances.

Acoustic vents, attenuators or redesigned duct routes may be needed where ventilation is a significant transmission path.

Noise in Flats and Converted Properties

Neighbour noise can be particularly complex in flats, apartments and converted buildings because several homes may share floors, walls, beams, ceiling voids and service routes.

A sound that appears to pass through one wall may actually have travelled through a connected floor slab, roof space or structural frame.

Our guidance on flat and HMO soundproofing explains some of the additional considerations found in multi-occupancy buildings.

Lease conditions, landlord permission, fire compartmentation and building requirements may also need to be checked before work begins.

Soundproofing Is Different from Sound Absorption

Soundproofing helps reduce noise passing between separate rooms or properties. Sound absorption controls echo and reverberation within the same room.

Acoustic foam, fabric panels and ceiling absorbers may make an internal space sound less reflective.

They should not be relied upon to block neighbour noise through walls, floors or ceilings.

A room may require both treatments, but each performs a different function.

Considerate Behaviour Can Support Soundproofing

Where it is appropriate and safe, a calm conversation with a neighbour may help. People are not always aware of how clearly their television, speakers, footsteps or appliances can be heard elsewhere.

Possible changes at the source may include:

• Moving speakers away from party walls
• Using isolation pads beneath equipment
• Reducing bass settings
• Using suitable floor coverings or underlays
• Avoiding noisy appliances during quieter hours

These measures do not replace soundproofing where a building provides poor separation, but they may reduce the amount of sound energy entering the structure.

Installation Quality Matters

Even suitable products can underperform if they are installed incorrectly.

Common problems include:

• Rigid fixings bridging resilient components
• Unsealed board edges
• Compressed cavity insulation
• Floating floors touching surrounding walls
• Untreated service openings
• Poorly fitted door seals

Some straightforward systems may be suitable for an experienced DIY installer. Independent walls, floating floors, suspended ceilings and work affecting ventilation or fire compartmentation may require a competent tradesperson familiar with acoustic construction.

Set Realistic Expectations

Soundproofing can reduce noise between neighbouring homes, but it cannot guarantee complete silence or prevent every sound from being heard.

The result will depend on:

• The source, level and frequency of the noise
• Whether it is airborne, impact-based or structure-borne
• The existing building construction
• The number and severity of weak points
• Flanking transmission
• The complete system selected
• The quality of installation

Low-frequency bass, heavy impact noise and structural vibration can be particularly difficult to control.

The practical objective is normally to achieve a useful reduction rather than bring neighbour noise to a complete end.

Plan a Targeted Soundproofing Project

Before ordering soundproofing products, establish the type of noise and identify the principal wall, floor, ceiling, door or service route involved.

A coordinated treatment based on the actual transmission paths is generally more effective than applying unrelated materials throughout the affected room.

Call Acoustic Supplies on 01204 548400 or contact the team online to discuss your soundproofing project.