How to specify acoustic fencing

An acoustic fencing specification defines the materials, construction methods, performance standards, and installation requirements needed to achieve effective noise reduction.

Whether you are specifying a barrier for highways, commercial developments, schools, or industrial sites, a clear specification is essential to ensure the fence performs as intended in real-world conditions.

Jakoustic Reflective (Commercial and Highway) installed at Ilderton Primary School to reduce road noise

Acoustic fencing specification checklist

A compliant and effective acoustic fence should meet the following requirements:

Jakoustic Reflective between a McDonald's car park and residential estate

Noise reduction performance

The primary purpose of acoustic fencing is to reduce noise transmission. While aesthetics, privacy, and security are important, they should remain secondary considerations when writing an acoustic fencing specification.

Standard timber garden fencing is not suitable for noise reduction due to low mass density, gaps between boards and inconsistent construction.

Surface mass density and thickness

Effective acoustic fencing must have sufficient weight to block sound.

Heavier, thicker materials help prevent sound waves from passing through the structure. Lightweight or thin fencing will not achieve effective acoustic performance.

Airtight construction

An acoustic fence must form a completely sealed barrier. Even small gaps can significantly reduce its ability to block sound.

UK compliance (UKCA marking)

For highways and railway applications in the UK, acoustic fencing must be UKCA marked as a complete system and supported by a Declaration of Performance.

It is important to note that individual components with UKCA marking do not automatically create a compliant acoustic barrier. The full system must be certified.

Reflective vs absorptive acoustic fencing

The correct barrier type should always be specified based on the site conditions.

Reflective acoustic fencing redirects sound away from the protected area and is typically used for highways, railways, and large open spaces.

Absorptive acoustic fencing is designed to absorb sound energy using materials such as mineral wool. It is more suitable for confined spaces such as plant enclosures, generators and HVAC equipment.

Choosing the wrong type of acoustic barrier can reduce effectiveness or even worsen noise issues.

Jakoustic Absorptive

Height, distance and positioning

The effectiveness of acoustic fencing depends not only on materials but also on positioning.

Because these variables are site-specific, a professional acoustic survey is recommended to determine the correct specification.

Panel design and construction methods

Not all timber fencing designs are suitable for acoustic applications.

Lap panels and featheredge designs can create inconsistencies and gaps, which allow sound to pass through.

Tongue and groove construction is recommended as it provides a tighter seal. Designs should also account for timber shrinkage over time to prevent gaps forming.

Single-sided and double-sided barriers

Single-sided acoustic fencing is the most common solution and works well in most environments.

Double-sided acoustic fencing can provide enhanced performance but requires a larger footprint and may not be suitable for all sites.

Acoustic fencing in practice

Acoustic fencing is used across a wide range of applications, including highways, schools, residential developments, industrial sites and healthcare environments.

Each location requires a tailored acoustic fencing specification based on noise levels, space constraints and performance requirements.

Acoustic fencing specification FAQs

What is an acoustic fencing specification?

An acoustic fencing specification outlines the requirements for designing and constructing a fence that effectively reduces noise, including materials, thickness, mass and installation details.

What thickness should acoustic fencing be?

Acoustic fencing should be at least 25mm thick, with 34mm recommended for improved noise reduction performance.

What is the minimum mass for acoustic fencing?

A minimum surface mass density of 10kg/m² is typically required to prevent sound passing through the material.

Does acoustic fencing need to be airtight?

Yes, acoustic fencing must be fully sealed with no gaps, as even small openings can significantly reduce effectiveness.

What is the difference between reflective and absorptive acoustic fencing?

Reflective fencing redirects sound away from an area, while absorptive fencing absorbs and dissipates sound energy. The correct option depends on the site conditions.

Do acoustic fences need UKCA certification?

For highways and railways in the UK, acoustic fencing must be UKCA marked as a complete system and supported by a Declaration of Performance.

How high should acoustic fencing be?

The required height depends on the location of the noise source, the receiver and the site layout. A professional acoustic assessment is recommended.

Is standard garden fencing acoustic?

No, standard garden fencing does not provide effective noise reduction due to insufficient mass and gaps in construction.

Expert acoustic fencing advice

Every project is different, and the most effective acoustic fencing specifications are developed using site surveys, noise measurements and professional acoustic input.

Working with an experienced manufacturer can help ensure your acoustic fencing meets performance, compliance and durability requirements.

A tailored solution for your project

From schools to hospitals, and retail/industrial estates to transport hubs, there are many types of places where controlling noise levels is necessary – virtually any space that is at times inhabited by large crowds or contains heavy machinery. But the requirements of a place of worship will be very different to a public space, hotel, bar or casino, or indeed a government office. Getting advice from trained professionals is a crucial step to ensuring your solution is effective.

To find out what we can do for you at Jacksons Fencing, speak to us today. Check out some of our other related blogs below for more advice and guidance on acoustic barriers.

Common Acoustic Fencing Mistakes

Managing Noise Pollution