Quietstone Light can be pigmented and finished for architectural and commercial applications.

Coloured Quietstone recycled glass acoustic panels installed as sound absorbing wall treatment

Outdoor Acoustic Panels That Can Also Work Indoors

Most people first come across acoustic panels in studios, offices or cinema rooms. The difficulty is that many real-world noise problems sit in much tougher environments: beside an air source heat pump, in a garden room, around plant equipment, in a workshop, on a balcony or against an external noise screen.

For these applications, a soft fabric panel or exposed mineral-fibre absorber may not be the most practical choice. The acoustic treatment needs to cope with impact, weather, moisture and day-to-day wear while still absorbing reflected sound.

That is the role of Quietstone Acoustic Panels. The 1200mm x 600mm x 50mm panel sold by Soundproofing King is a rigid sound absorber manufactured from recycled glass and intended for high-durability internal and external applications.

What Is Quietstone?

Quietstone Light is a rigid, porous acoustic panel made from expanded recycled glass. The manufacturer describes it as suitable for both interior and exterior use, particularly where durability and impact resistance are required.

·        High sound absorption for reducing reverberation and reflected noise

·        Weather-resistant construction for external and exposed applications

·        Rigid, self-bearing panel rather than a soft acoustic foam

·        Non-fibrous material

·        Non-combustible construction, with manufacturer fire classifications available

·        94% recycled glass according to the manufacturer brochure

·        Can be cut and worked on site with normal woodworking tools

·        Can be bonded to a suitable substrate or mechanically fixed

·        Can be pigmented or treated with a range of finishes

·        Manufacturer acoustic data reaches Class A performance in some thickness and mounting configurations

Close-up of the rigid porous Quietstone panel structure.

Heat Pump Noise: Where Acoustic Absorption Helps

Air source heat pumps contain fans and compressors, so some operational noise is unavoidable. The perceived noise can become more noticeable when the outdoor unit is placed close to brickwork, fences, rendered walls or inside a narrow passage because these hard surfaces can reflect sound back into the space.

Quietstone's own heat-pump guidance recommends treating nearby hard surfaces with weatherproof sound-absorbing panels where reverberation is contributing to the problem. It also discusses using acoustic panels as part of a properly designed enclosure.

A heat pump screen should do more than simply hide the unit

A solid screen can interrupt the direct line of sight between a heat pump and a neighbour, but a completely hard enclosure can create another problem: sound reflecting around the inside. Lining appropriate faces with an absorber helps reduce that internal build-up.

The best arrangement depends on the unit, the property and the receiver. A common design principle is to combine a solid barrier or screen where sound blocking is required with an absorbent facing on the noise-source side.

Do not compromise airflow

Heat pumps depend on free airflow and manufacturer-specified clearances. Acoustic treatment should never be used to create a sealed box around the unit. Any screen or enclosure should preserve inlet and discharge airflow, service access, drainage and the heat-pump manufacturer's installation requirements.

Garden Rooms, Home Offices and Workshops

Garden rooms and outbuildings often contain a lot of hard, parallel surfaces. Plasterboard, timber panels, glass doors and hard floors can produce an acoustically lively room, particularly when the space is used for calls, music, gaming, exercise or machinery.

Adding sound absorption reduces the amount of energy repeatedly bouncing around the room. This can improve speech clarity, make music and recorded audio easier to control, and reduce the harsh character of a reverberant space.

For projects that also need to control sound transfer through the structure, combine room treatment with the correct wall, floor and ceiling build-up. See Garden Studio Soundproofing for the structural soundproofing side of the project.

Recording Studios, Music Rooms and Fitness Spaces

Acoustic absorption can be integrated at high level and around ceilings where wall area is limited.

A studio needs two different acoustic strategies. Sound insulation controls noise passing into or out of the room. Acoustic treatment controls what the sound does once it is inside. Quietstone belongs primarily to the second category.

On walls or ceilings, rigid absorbers can help shorten reverberation and reduce strong reflections. That can improve vocal intelligibility, monitoring conditions and overall comfort. The rigid construction is particularly useful in areas where softer fabric absorbers could be knocked, marked or damaged.

If you are building a full recording, rehearsal or cinema room, browse Studio Soundproofing for isolation products, then use absorbers such as Quietstone for room-acoustic control.

Plant Rooms, Generators and Commercial Equipment

Mechanical plant rooms and generator areas are another strong application because they combine hard reflective surfaces with equipment noise. Acoustic absorption can be added to walls, screens or suitable enclosure surfaces to reduce reverberation around the source.

·        Air-conditioning and refrigeration plant areas

·        Generator and compressor enclosures

·        Mechanical and electrical plant rooms

·        Workshops and machinery areas

·        Loading and service areas with reflective walls

·        External equipment screens and acoustic barrier facings

For commercial plant, the noise-control design should be based on the actual equipment spectrum, operating condition, ventilation requirement and nearby noise-sensitive receptors. Quietstone can form the absorbent layer, but it should not be presented as a guaranteed standalone cure for every plant-noise problem.

Why a Rigid Weather-Resistant Absorber Is Useful

Quietstone can be installed as a neat modular wall treatment.

Traditional absorbers are often hidden behind fabric, perforated metal or other protective finishes. Quietstone is different because the absorber itself is rigid and durable. That opens up applications where the acoustic surface may be exposed.

·        External locations where rain and frost are a concern

·        Low-level wall areas that may be touched or knocked

·        Plant and service areas requiring a robust finish

·        Studios and commercial spaces where a clean architectural panel is preferred

·        Projects requiring coloured or custom-finished acoustic treatment

Does Quietstone Actually Soundproof a Wall?

Not on its own. This is one of the most important points to get right when specifying any acoustic panel.

A sound absorber reduces reflections within a room or enclosure. A sound-insulating wall or barrier is intended to reduce transmission from one side to the other. The two functions can be combined in one design, but they are not interchangeable.

For example, an external noise barrier may use a dense, continuous backing to block the direct sound path, with Quietstone fitted on the source-facing side to absorb reflected energy. In a studio, the separating wall may use plasterboard, mass, isolation and mineral wool, while Quietstone is then used on the room face to control reverberation.

Installation Options

Quietstone states that its panels can be bonded to suitable solid substrates or mechanically fixed. Mechanical fixing also allows panels to be installed on frameworks with an air gap, and the manufacturer's acoustic data shows that mounting arrangement can materially affect sound absorption.

1.        Check the substrate, exposure and fixing requirements for the specific project.

2.        Plan panel layout and joints before cutting.

3.        Use suitable mechanical fixings or an adhesive system approved for the substrate and exposure.

4.        Where an air gap or backing layer is part of the acoustic specification, maintain the designed cavity consistently.

5.        For external or plant applications, consider wind load, edge protection, drainage, maintenance access and structural safety.

For high-level ceilings, external structures and safety-critical installations, fixing design should be confirmed by the project installer or designer rather than assumed from a simple decorative wall installation.

Quietstone 1200mm x 600mm x 50mm: Product Summary

Frequently Asked Questions

Can Quietstone be used outside?

Yes. The manufacturer lists Quietstone Light as suitable for exterior use and weather resistant, including resistance to rain and frost. The fixing system and supporting structure still need to be appropriate for outdoor exposure.

Can Quietstone reduce heat pump noise?

It can help reduce reflected sound when used on nearby hard surfaces or as the absorbent lining of a correctly designed screen or enclosure. The complete result depends on the heat pump, layout, barrier design, airflow and receiver position.

Is Quietstone the same as acoustic foam?

No. Quietstone is a rigid recycled-glass absorber. It is substantially more durable than typical soft acoustic foam and is intended for demanding indoor and outdoor uses.

Can I use Quietstone in a recording studio?

Yes, as acoustic treatment for reverberation and reflection control. If you also need to stop sound escaping the studio, a separate sound-insulation build-up will normally be required.

Can Quietstone be cut on site?

Yes. Quietstone states that the material can be worked with normal woodworking equipment. Follow the manufacturer's handling and dust-control guidance.

Does the 50mm panel automatically achieve Class A absorption?

No. The manufacturer reports performance up to Class A depending on panel thickness and mounting. Acoustic class should be tied to the tested build-up rather than assumed from panel thickness alone.

Links:

·        Quietstone Acoustic Panels — https://soundproofingking.co.uk/products/quietstone-1200mm-x-600mm-x-50mm 

·        Acoustic Absorption / Panels — https://soundproofingking.co.uk/collections/acoustic-absorption-panels 

·        Studio Soundproofing — https://soundproofingking.co.uk/collections/studio-soundproofing 

·        Garden Studio Soundproofing — https://soundproofingking.co.uk/collections/garden-studio-soundproofing 

·        Contact Soundproofing King — https://soundproofingking.co.uk/pages/contact