Acoustic Flat Roof Board

Acoustic flat roof boards are cover boards designed to reduce the sound penetrating through a roof assembly. Structures such as airports, buildings in urban environments or educational and public spaces such as libraries and schools have a desire to design noise and vibrations out. Buildings such as factories with increased levels of noise, due to internal machinery for instance, may conversely try to keep the noise in and prevent it from disrupting surrounding buildings and the environment.

Roofs play an important role in the acoustic strategy of any building as they are exposed to both airborne sounds from air and road traffic but also impact sounds such as rain. Flat roofs, especially metal and lightweight roofs, require careful design considerations to ensure their desired acoustic performance.

Gypsum core cover boards with their higher density cores have superior sound transmission and sound insulation qualities that help absorb or reduce noise. They can be installed in single or multiple layers to help achieve the required levels of acoustic performance. Acoustic flat roof cover boards are a practical solution for acoustic control that is economical, easy to install and does not impact design flexibility.

Noise pollution can have a devastating impact on occupant comfort, health, and productivity. Designing roofs with a cover board can help achieve better acoustic performance and therefore more comfortable buildings.

What is the application of acoustic DensDeck® Roof Boards?

DensDeck® Roof Boards are effective in reducing the sound impact as their high-density gypsum core helps reduce sound transmission and provides sound insulation. Our cover boards are often specified in environments where high external noise is expected, such as for airports. Here the boards help minimise the impact of sound on building users, enhancing occupant comfort, and improving their experience.

In urban areas, cover boards can be installed to help design external noise out of a building. They are used in museums, biotechnology centres, libraries and education and healthcare sectors to help minimise the impact of noise on health and productivity of occupiers and in the design of healthier buildings.

DensDeck® Roof Boards can also help minimise noise pollution from buildings such as factories, protecting surrounding buildings and environment. Roof systems designed as holistic systems using DensDeck® Roof Boards can achieve significant acoustic performance improvements, enabling architects to design, and specifiers to deliver, healthier buildings.

Acoustic Flat Roof Board

What are the benefits of acoustic flat roof boards?

• Increased acoustic performance
• Increased occupant comfort
• Noise pollution reduction


DensDeck® Prime Roof Board
Thickness (mm)6.4 (¼ inch)12.7 (½ inch)15.9 (⅝ inch)
Length (mm)243824382438
Width (mm)1219

Roof protection boards

The DensDeck® Roof Board helps protect all types of flat roof build ups from natural forces such as hail and wind. They provide dimensional stability to the roof system and shield the waterproofing membrane from dead loads of heavy plant and sudden impact, such as dropped tools or flying debris, whilst adding additional fire resistance.

Sound Reduction

DensDeck® Roof Boards help block the sound penetrating through a roof assembly into a building. Our cover boards help increase occupant acoustic comfort even in high noise commercial settings such as airports.

Acoustic performance >

Fire Resistant

DensDeck® Roof Boards help protect the roof assembly from external fire sources, such as malfunctioning solar panels or embers from a nearby building. They also help to protect the roof space from internal fire spread.

Fire resistance >

Weather Resistance

DensDeck® Roof Boards enhance fastener pull through, increase membrane bond strength as well as dimensional strength. This means greater resistance to wind uplift and repeated hail strikes.

Weather resistance >

Roof Access

DensDeck® Roof Boards spread loads and helps protect the insulation layer installed underneath roof build ups. Our cover boards have high compressive strength and add structural strength to the roof assembly, absorbing foot traffic and helping protect from sudden, damaging impacts.

Roof access >


Datacentre construction has a unique set of demands on the building envelope performance. The roof system must be robust and waterproof. Any moisture penetrating through the building envelope could cause service disruption with considerable commercial impact or even damage the expensive equipment. Specification of fibreglass mat face gypsum cover boards is ideal for both new datacentre projects and roof renovations that seek fast project delivery times and exceptional building performance.

Heritage buildings

Conservation and refurbishment of roofs for heritage buildings demands attention to detail. They often use roof coverings made from traditional materials, making installation more time and labour intensive.

Heritage roofs may have areas that are difficult to access, posing a challenge when it comes to the installation and the performance of the roof system. Cover boards are specified to make roof refurbishment easier. They also help increase the building performance of traditional, heritage buildings.

Museums & libraries

Roofing systems for museums and libraries have the important function of protecting valuable collections and creating a safe, comfortable space for the public visiting the facilities. Museums and libraries often combine traditional heritage buildings and striking modern extensions.

This allows architects and designers to blend high performing heritage roof refurbishments with modern green, metal, solar panel roofs, roof terraces with parapet systems or a fusion of the various roof types. Cover boards are a crucial part of these roof build ups capable of enhancing their performance and extending their design life.


Airports, hangar and maintenance buildings, car parks and other buildings in the aviation sector present their own set of challenges. These projects have intensive schedules and once finished, the highest level of building performance is expected to keep passengers comfortable and safe.

The performance enhancing capabilities of fibreglass mat face gypsum cover boards are ideal for specification in the aviation sector.


The construction of biotech centres must overcome a very specific set of challenges. These buildings fall within the critical sector and the expectation is that their roofing systems must be very robust.

Specification of fibreglass mat facer gypsum core cover boards enhances the performance and longevity of roof systems for biotech centres. It can also target improvement in specific areas of building performance, as required by each project.

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