8.5mm DBx PRO Acoustic Board is a slim, high-performance soundproofing board designed to improve acoustic performance in walls, floors and ceilings. Measuring 1200mm x 800mm x 8.5mm, each board covers 0.96m² and provides a very thin acoustic layer for domestic, commercial and trade soundproofing projects.
DBx PRO boards use a dense sand-filled corrugated board construction to help reduce sound transfer through walls, floors and ceilings. The 8.5mm version is the slimmest DBx PRO board option, making it especially useful where space is limited but acoustic improvement is still required.
8.5mm DBx PRO Acoustic Board is used as part of wall, floor and ceiling soundproofing systems where a very slim acoustic board layer is needed.
It is commonly used for party wall upgrades, timber floor soundproofing, ceiling soundproofing, home offices, bedrooms, studios, media rooms, flats, apartments, commercial spaces and refurbishment projects where available build-up depth is limited.
DBx PRO works by adding a dense acoustic board layer to the structure. The sand-filled core helps dissipate sound energy and add acoustic mass, while the board format makes it practical to install on walls, floors and ceilings.
In walls and ceilings, DBx PRO is commonly used with resilient bars, furring channels, acoustic plasterboard, acoustic mineral wool and acoustic sealant. In floors, it can be installed as a floating acoustic board layer beneath suitable floor finishes.
8.5mm DBx PRO Acoustic Board can help reduce both airborne noise and impact noise when used as part of the correct system.
Airborne noise includes voices, TV noise, music, traffic noise and general room-to-room sound transfer. Impact noise includes footsteps, dropped items, furniture movement and vibration through floor structures.
The final result will depend on the existing structure, board layout, fixing method, surrounding materials, sealing detail and whether flanking noise paths are treated.
8.5mm DBx PRO Acoustic Board is suitable for a range of acoustic applications, including:
8.5mm DBx PRO is useful where acoustic improvement is required but space loss needs to be kept as low as possible. At only 8.5mm thick, it can be used in very slim wall, floor and ceiling build-ups without adding excessive depth.
It is a versatile board that can be used across multiple applications, making it suitable for both DIY users and trade installers. It is especially useful where a dense acoustic board layer is required before installing the final wall, ceiling or floor finish.
The main difference is board thickness and mass. 8.5mm DBx PRO is the slimmest option, making it useful where space loss needs to be kept to an absolute minimum. 10mm DBx PRO provides a slightly thicker board layer, while 15mm DBx PRO is the thicker and heavier option.
The right option depends on the existing structure, available build-up depth, noise issue and overall soundproofing system design.
DBx PRO Acoustic Board performs best when used as part of a complete soundproofing system. The final result will depend on the existing wall, floor or ceiling structure, the fixing method, the surrounding materials and how well gaps, joints and perimeter edges are sealed.
For walls and ceilings, DBx PRO is commonly used with resilient bars, furring channels, acoustic plasterboard, acoustic mineral wool and acoustic sealant. For floors, it is commonly used as a floating acoustic board layer beneath compatible floor finishes.
If you are unsure whether 8.5mm DBx PRO is right for your project, please contact our team before ordering. We can help advise on the most suitable system based on your room, noise issue, structure and available build-up depth.
8.5mm DBx PRO Acoustic Board is a slim acoustic soundproofing board used within wall, floor and ceiling systems. It is designed to add mass and improve acoustic performance in domestic, commercial and refurbishment projects where a very thin acoustic board is required.
| Product Name | 8.5mm DBx PRO Acoustic Board |
| Brand | DBx PRO |
| Product Type | Acoustic soundproofing board / acoustic panel |
| Material | Engineering-grade corrugated board filled with fine kiln-dried sand |
| Application | Walls, floors and ceilings |
| Suitable For | Party walls, separating walls, floors, ceilings, commercial spaces, music rooms, performance spaces and studios |
| Board Size | 1200mm x 800mm |
| Thickness | 8.5mm |
| Coverage | 0.96m² per board |
| Pack Size | 1 board |
| Mass | 13.2kg/m² |
| Approx. Weight Per Board | Approx. 12.7kg, based on 13.2kg/m² and 0.96m² board coverage |
| Edge Type | Square edge |
| Fire Performance | B1 / B-s1, d0 |
| Main Noise Types | Airborne noise and impact noise, depending on system build-up |
| Published Acoustic Data | Published figures include up to 67dB airborne performance and up to 52dB impact performance; final performance depends on the full system and test conditions |
| Installation Method – Floors | Usually installed floating, tightly butted in a brickwork pattern |
| Installation Method – Walls/Ceilings | Fixed to resilient bars, furring channels or suitable wall surfaces depending on system design |
| Cutting Method | Utility knife, jigsaw with metal blade or circular saw |
| Sealing Method | Cut edges should be resealed with DBx board tape before installation |
| Underfloor Heating | Suitable for some underfloor heating systems; confirm full system compatibility before installation |
| Standalone Product? | No — should be used as part of a complete acoustic wall, floor or ceiling system |
8.5mm DBx PRO Acoustic Board can be used in a range of soundproofing applications, including:
DBx PRO is used to improve sound insulation by adding a dense acoustic board layer to the build-up. It can help reduce airborne noise through walls and ceilings, and it can also help reduce impact noise when used in suitable floor systems.
The 8.5mm version is especially useful for slim constructions where a thicker acoustic board may not be suitable.
8.5mm DBx PRO Acoustic Board is not a complete soundproofing system on its own. The final performance depends on the full wall, floor or ceiling construction.
Published acoustic figures should be treated as system or test-condition dependent. Existing structure, flanking paths, installation quality, board joints, perimeter sealing, floor finish and supporting materials can all affect the final result.
For compliance-led projects, such as Building Regulations Part E, use the correct tested system data and seek project-specific acoustic advice where required.
DBx PRO boards are dense and should be handled carefully. Store the boards flat, dry and protected before installation.
When cutting, keep the boards flat at all times to help retain the sand core inside the board. After cutting, reseal cut edges with DBx board tape before installation.
Avoid leaving exposed, unsealed cut edges. Neat cutting, tight joints and good sealing are important for acoustic performance.
8.5mm DBx PRO Acoustic Board can be installed in walls, floors and ceilings as part of a complete acoustic soundproofing system. The correct installation method depends on the structure, noise issue and final finish.
For best results, boards should be installed flat, tightly jointed and properly sealed. Any cut edges should be resealed with DBx board tape before installation.
Check the installation area before fitting the DBx PRO boards. The surface or frame should be clean, dry, stable and suitable for the chosen fixing method.
Inspect the wall, floor or ceiling for gaps, cracks, loose areas, service penetrations and weak points. These should be repaired or sealed before the boards are installed.
Plan the full acoustic build-up before starting. DBx PRO is most effective when used with suitable supporting materials such as acoustic mineral wool, resilient bars, furring channels, acoustic plasterboard and acoustic sealant.
Make sure the installation area is ready. The surface or frame should be:
For floors, fix any loose boards before installation. For walls, remove loose paint, wallpaper, unstable plaster or other weak surface material. For ceilings, make sure the fixing structure is capable of carrying the board weight.
Before fitting the boards, seal obvious sound leakage paths. Pay close attention to:
Use acoustic sealant where suitable. Sound can travel through small gaps, so sealing is an important part of the installation.
Measure the installation area and plan the board layout before cutting. DBx PRO boards measure 1200mm x 800mm and cover 0.96m² each.
Plan the layout so joints are tight and unnecessary small offcuts are avoided. For floors, boards are commonly installed in a brickwork pattern with staggered joints. For walls, portrait orientation is often preferred because it can make socket positioning and cutting easier.
Keep the boards flat while cutting. This helps retain the sand core inside the board.
DBx PRO boards can be cut using:
Cut carefully around sockets, pipes, corners, thresholds and other obstructions. Keep cuts neat and avoid leaving unnecessary gaps.
After cutting, reseal the cut edges with DBx board sealing tape before installation.
This is important because the board contains a sand-based core. Resealing the board helps keep the board intact and prevents material loss from cut edges.
Do not install boards with open or unsealed cut edges.
For floor installations, lay the DBx PRO boards floating over the prepared floor surface. Boards should be tightly butted together and installed in a brickwork pattern where possible.
Make sure the boards lie flat with no rocking, raised edges or open gaps. If the floor covering is being glued down, the DBx boards may need to be bonded to the floor or installed as part of a bonded board system depending on the floor finish requirements.
Keep all joints tight and seal perimeter gaps with acoustic sealant where required.
For wall installations, DBx PRO boards can be installed as part of a direct-to-wall or decoupled wall system.
For best decoupling results, DBx PRO is commonly mounted onto resilient bars or furring channels using suitable drywall screws. It can also be bonded directly to suitable wall surfaces using high-contact adhesive where the system allows.
When installing on walls, keep boards tightly jointed and avoid unnecessary gaps around sockets, corners and service penetrations.
For ceiling installations, DBx PRO is usually installed as part of a decoupled ceiling system with resilient bars or furring channels.
Ceiling installations must be securely fixed into a suitable structure. Check the board weight and make sure the ceiling system, fixings and framing are suitable before installation.
For best performance, DBx PRO may be combined with acoustic mineral wool in the ceiling void, resilient bars or furring channels, acoustic plasterboard and acoustic sealant.
Once the boards are installed, check all joints, cut areas and perimeter edges.
Use acoustic sealant to seal:
The aim is to create a continuous acoustic layer with no obvious sound leakage paths.
After the DBx PRO boards are fitted and sealed, install the final finish according to the project requirements.
Depending on the application, this may include:
Always check the final floor or wall finish manufacturer’s guidance before installation.
DBx PRO can be used below timber or laminate floor finishes where the flooring manufacturer allows. The boards should be laid flat, tightly butted and properly sealed before the final floor finish is installed.
Expansion gaps required by the floor finish manufacturer should still be followed. Where suitable, perimeter gaps can be sealed with flexible acoustic sealant to reduce flanking noise.
When installing carpet over DBx PRO boards, a suitable carpet underlay may be required for comfort and finish quality.
Gripper rods may need to be fixed using suitable screws or high-grab adhesive, depending on the system. Avoid unnecessary fixings through acoustic layers where this could create sound bridges.
DBx PRO can be suitable for use with some underfloor heating systems, but the full system must be checked before installation.
Confirm compatibility with the underfloor heating manufacturer and final floor finish manufacturer. The floor build-up must be suitable for heat transfer, load, expansion and long-term stability.
8.5mm DBx PRO Acoustic Board can improve the acoustic performance of a wall, floor or ceiling system, but the final result depends on the complete build-up.
Existing structure, flanking noise paths, board layout, fixing method, sealing detail, ceiling treatment, floor finish and surrounding materials can all affect performance.
If you are unsure how to use DBx PRO Acoustic Board in your project, please contact our team before installation. We can help advise on the most suitable acoustic system based on your room, structure, noise issue and available build-up depth.
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