These 1200mm x 800mm acoustic boards are highly-engineered, offering superb, lab-tested performance as a high-spec replacement for one layer of standard acoustic plasterboard on both walls and ceilings.
Original price £27.50
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Original price £27.50
Original price
£27.50 ex VAT
£27.50
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£27.50
Current price £27.50 ex VAT
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In stock – Ready to ship
Estimated delivery: 3–5 business days
Quick Delivery Info
We know soundproofing gear isn't exactly letterbox-friendly. Most items are bulky and heavy but don’t worry, we’ve got it covered.
Heavy Products: Ensure you have enough help to handle your delivery.
Pallet deliveries are kerbside only: You will need to move the goods from the kerb to your property.
Non-pallet deliveries are hand-unloaded: The driver will need assistance but for safety/insurance reasons, can’t enter private property or carry items inside.
Low Cost Delivery: What we pay, you pay.
Split deliveries may be necessary: This keeps your costs low.
Specialist Delivery: Prices vary per item/location.
Pallet Delivery: £85 + VAT per pallet (max 750kg). We refund if fewer pallets are used.
Courier Delivery: £15 for small items, £32 for oversized.
Merchant Delivery: £50 under £300 | £25 under £1,000 | Free over £1,000 (min order £150).
Returns: Accepted within 30 days if items are resalable and authorised in advance (40% restock fee or £50 min).
For full details including access, insurance, and returns info, see our Delivery Page.
Our calculators work out exactly what you’ll need to soundproof a wall or ceiling.
Just enter the dimensions of your wall or ceiling, and you’ll get the correct number of GenieClips, furring strips, plasterboards and all the accessories you will need.
It’s the easiest way to make sure you’ve got everything to complete your project without waste or guesswork.
SBx 8.5mm Boards are high-performance, engineered acoustic boards that deliver superior soundproofing in a slim, 8.5mm design. Designed for both residential and commercial spaces, these boards are a versatile solution for soundproofing walls, ceilings, and floors. Whether you’re looking to control noise from neighbouring spaces, create a peaceful living environment, or enhance acoustics in music and entertainment rooms, SBx Boards offer a powerful, eco-friendly, and space-saving option.
Fully manufactured in the UK, SBx 8.5mm offers superb acoustic performance:
Impact Ln,w(c1): 52dB Airbourne Rw(C:Ctr): 67dB
What to find out what these numbers mean? See here.
What is an SBx Soundproof Board?
SBx Soundproof Boards are advanced acoustic insulation panels made from a combination of cross-fluted engineered card and hardboard filled with finely compacted quartz sand. This construction provides the boards with high mass, density, and unique self-decoupling properties, making them exceptionally effective at reducing both impact and airborne noise. The SBx 8.5mm board is the thinner version of the popular 15mm SBx model, designed to fit seamlessly into spaces where a slimmer profile is preferred without sacrificing soundproofing quality.
How Do SBx Acoustic Boards Work?
SBx Acoustic Boards work by utilising their dense sand-filled core and unique structural design to absorb and block sound energy. The cross-fluted card construction, combined with the compacted quartz sand, provides high mass and natural self-decoupling, which helps to break up sound waves and dampen vibrations. These properties make SBx boards exceptionally effective at reducing sound transmission between spaces, as well as improving thermal mass in lightweight structures. When installed, SBx boards act as a dense barrier, effectively trapping sound and reducing the level of noise that can pass through walls and ceilings.
What Type of Noise Do the 10mm SBx Acoustic Boards Stop?
SBx 10mm Boards are highly effective at blocking both airborne noise (such as voices, TV sounds, and music) and impact noise (like footsteps, furniture movement, and vibrations). Their high-density construction dampens sound energy, making them ideal for use in spaces where managing multiple types of noise is crucial. The boards are particularly beneficial in areas prone to noise transfer, like party walls, separating walls, and ceilings in multi-level buildings.
Where Can the 10mm SBx Soundproof Boards Be Used?
The 10mm SBx Soundproof Boards are designed to be versatile and can be installed on walls, ceilings, and floors across a variety of settings. They’re perfect for residential properties, offices, entertainment rooms, home studios, and music rooms, as well as in conversions, renovations, and new builds. Whether you’re soundproofing against a noisy neighbour or aiming to improve acoustics within a dedicated room, the SBx boards provide a reliable solution that fits into compact spaces.
How to Install the 8.5mm SBx Acoustic Boards
Prepare the Surface: Ensure the surface is clean, smooth, and free of dust or debris.
Fit the Boards: Cut the boards to size as needed using a standard saw or utility knife. The boards are designed for easy installation with simple butt joints, eliminating the need for flanking strips.
Secure in Place: Attach the SBx boards to the wall or ceiling surface using appropriate fixings, ensuring a tight fit between each board to maintain a seamless soundproof barrier. For optimal results, consider pairing with 60kg/m³ acoustic mineral wool for enhanced soundproofing.
What Are the Benefits of the SBx Soundproof Boards?
Superior Noise Reduction: Blocks both airborne and impact noise effectively, creating a quieter environment.
Space-Saving Design: At only 8.5mm thick, these boards are a slim alternative to standard plasterboard layers, perfect for tight spaces.
Eco-Friendly Composition: Made from sustainable, natural materials like cardboard and sand, these boards are pollutant-free, breathable, and odourless.
Simple Installation: Easy to cut and install with simple butt joints, making it a user-friendly choice for DIY and professional installers alike.
Versatile Applications: Suitable for walls, floors, and ceilings in residential, commercial, and specialised environments like studios and entertainment rooms.
Visit our Fitting Instructions section for more detailed guidance specific to your application.
Please contact our team if you have any questions about this product.
Looking for a complete soundproofing solution?
If your looking for soundproofing for a particular situation or application, then the best place to start is with our soundproofing solutions that cover walls, floors, ceilings and reducing echo. Select the relevant application below to find out more.
The SBX board is used in place of a 12.5mm acoustic plasterboard. The product can be screwed in the same way as plasterboard. Cutting and sealing is done in the same way on all sizes of SBx boards.
The boards are labelled with a particular side to be facing outwards. This ensures the product lies consistently from board to board.
Cutting SBx Boards to size
Ensure careful handling to minimise filler spillage – otherwise the final performance may be compromised
Only cut the SBx boards while it is laid flat
Use a straight edge for guidance
Cut with a jigsaw, hand saw, Stanley knife or circular saw (ceramic tile tungsten carbide grit jigsaw blade, or general purpose tungsten carbide fine tooth circular saw blade, for longevity)
Immediately seal all cut edges with SBx Tape while holding the board upright - See below for more details on using SBx Tape
We recommend installing SBx boards in portrait orientation on walls to allow socket holes to be cut without the loss of excess sand
Watch the SBx boards being installed by professionals:
Fitting Floor finishes over SBx Boards
Here is guidance on installing different floor finishes on top of the SBx boards:
a. Wood flooring must be acclimatised in the fitting location prior to fitting for the length of time specified by the flooring manufacturer. This prevents shrinkage, cupping and warping at a later date.
b. Prior to installation, the installer has the final responsibility to inspect the finished flooring as to grade, manufacture and factory finish. The installer must use reasonable selectivity and discard or cut off pieces with deficiencies.
c. It is imperative that the expansion gap is carefully adhered to as this is also necessary to prevent the transmission of sound from the wood flooring to the adjoining walls which in turn would transmit flanking noise. This gap is usually 6mm (12mm when floating) around all vertical objects and the whole perimeter of the room.
Fitting Fully Stuck LVT Tiles:
a. LVT can be fully stuck directly to the SBx board using the manufacturer's recommended adhesive. Most LVT manufacturers will recommend a 6mm flooring grade ply to be glued directly to the SBx board using a high grab adhesive, with the LVT fitted using the manufacturers guidelines.
b. SBx board is fully tested with F Ball for F44, F46, F48 Plus, F49, F60, F66, and F73.
Mechanical fixing (usually 6mm expansion gap):
a. Solid wooden flooring must not be nailed directly to SBx boards or through to the sub-deck, which would cause a sound bridge. For ‘Hidden Nail Technique’ glue 9mm (minimum) plywood, OSB or chipboard on top of SBx boards with wood flooring glue. Leave a 6mm gap between the wooden layer and the walls (and any other vertical structures) to reduce vibration and flanking noise.
b. Then nail the timber flooring directly into 9mm top layer only, leaving expansion gaps as per manufacturer’s instructions. Leave a 6mm gap between the flooring and the walls and any other vertical structures. The gap at the perimeter can be sealed with flexible acoustic sealant.
Bonding (usually 6mm expansion gap):
a. If the installer requires the option of being able to remove the wood flooring at a later date without damaging the SBx boards acoustic layer, then a wooden overlay must be laid and bonded to SBx boards - 3mm to 6mm thick plywood is common. It is important to leave a 6mm expansion gap around vertical objects and the whole perimeter of the room.
b. For bonding wooden flooring, use the wooden flooring adhesive as recommended by the flooring manufacturer (usually rubberised wood flooring glue) which should be spread evenly on the floor with a medium notched trowel, as per the flooring manufacturer’s instructions.
c. Always check for an adequate adhesive bond before proceeding.
Floating (usually 12mm expansion gap, 6mm for Laminate):
a. Flooring suitable for fitting as a floating layer, as per manufacturer’s guidance, (usually over 7mm thick), should be laid directly over SBx boards without underlay for the best acoustic performance.
b. It is important to leave a 12mm expansion gap, as recommended by flooring manufacturer, around vertical objects and the whole perimeter of the room. For laminate use the manufacturers recommended 6mm gap.
c. Joint Sealant for laminate flooring can be used to permanently protect laminate from moisture effects, if necessary.
Fitting Ceramic Tiles Directly over SBx boards
a. It is recommended to use marine plywood as your sub floor, if possible.
b. If floor height is not an issue it is recommended to lay a Tile Backing Board or a 6mm Marine (WBP) plywood board over SBx boards which is bonded to SBx boards using a grab adhesive. This will protect the SBx boards acoustic floor should you wish to change the tiles in the future. It is imperative to leave a 6mm expansion gap between the tile backing board / plywood and any vertical objects, as well as the whole perimeter of the room, and fill the gap with a permanently flexible and waterproof sealant, to reduce flanking noise.
c. If floor height is an issue, place a 100mm wide fibre glass mesh ‘scrim tape’ over all SBx boards joints. Then lay the tiles in a thin bed of rapid setting flexible cement based tile adhesive, suitable for wooden floors. The scrim tape ensures no movement will take place due to vapour in bathrooms and kitchens. If tiling a wet room, please see the next section.
Fitting Ceramic Tiles Directly over SBx boards in Wet Rooms
a. It is recommended to use marine ply as your sub floor, if possible.
b. SBx boards is moisture resistant and its performance will not deteriorate in these applications. Do not knock boards tightly together - simply lay lightly butted allowing for minimal expansion.
c. In high moisture areas it is important to lay a vapour barrier, or else it is recommended that a Tile Backing Board or a 6mm Marine (WBP) Plywood board should first be laid and bonded over SBx boards using a grab adhesive. It is imperative to leave a 6mm expansion gap between the tile backing board and any vertical objects, as well as the whole perimeter of the room, and fill the gap with a permanently flexible and waterproof sealant, to reduce flanking noise.
Fitting Carpet Directly over SBx boards
Carpets requiring an independent underlay:
a. SBx boards are not an ‘underlay’; a good quality carpet underlay is still required to protect the carpet and SBx boards.
b. Carpet grippers can be bonded to SBx boards in the same manner as for solid concrete floors; using a rapid set grab adhesive recommended for carpet grippers. Carpet tacks or nails ( if used ) are hammered through the carpet and into the carpet gripper - however it is imperative that these nails do not pass through into the sub-deck below. Common carpet gripper nails are insufficient length to pass through the SBx boards, but it is the installer’s responsibility to confirm this on site. Ideally there should not be penetrations through the carpet gripper but further screws can be added to support grippers as long as they don't exceed 500mm centres. What should be avoided is multiple penetrations though the board over a small area.
Carpets with a pre-bonded foam or felt underlay:
a. These carpets usually incorporate a thin foam or felt backing, insufficient to spread point pressure load, and therefore require a 3mm to 6mm plywood bonded to SBx boards prior to fitting the carpet.
b. The plywood is bonded to the SBx boards leaving a 6mm expansion gap around all vertical objects and the whole perimeter of the room, which can be filled with permanently flexible acoustic sealant.
c. Foam backed carpets should always have a brown building paper laid prior to fitting which prevents the foam from sticking to the floor when its glue seeps out.
Fitting Linoleum & Vinyl Directly over SBx boards
a. Linoleum or Vinyl cannot be fitted directly on the surface of SBx boards. For commercial applications use a hard Linoleum and Vinyl subfloor system floating over SBx boards or 6mm plywood bonded to SBx boards. For domestic applications, bond 3mm to 6mm plywood or similar to SBx boards.
b. The plywood is bonded to the SBx boards leaving a 6mm expansion gap around all vertical objects and the whole perimeter of the room, which can be filled with permanently flexible acoustic sealant.
Sealing a Cut SBx Board
Whenever the cut edge of the board is exposed the SBX sealing tape should be used to prevent silica leakage, here are basic instructions for sealing the cut boards:
Visit our Fitting Instructions section for more detailed instructions relating to your specific application.
Check out our Soundproofing Guides for more information, advice and tips on all aspects of soundproofing.
Don’t forget your SBx Board Sealing Tape!
Whenever the cut edge of the board is exposed the SBX sealing tape should be used to prevent silica leakage.
I will line the back of the plasterboard on all my walls when doing any future renovations. An excellent product. Especially when comnbined with Rockwool RWA3.
Best on line ‘sound insulation’ advice on website. Very helpful and knowledgeable in advising on products on phone.
Efficient and friendly service. Great ‘on hold’ music! A pleasure to deal with.
Very pleased with the brackets I purchased from soundstop, easy to install and good quality. Very helpful advice and fast delivery.
Thank you very much.
Sound proofing because of loud conversation downstairs
We had people in the flat below us, who spoke very very. Loudly . The soundproofing definitely helped. Thankfully they have now gone. Great product everyone I spoke to were very nice and helpful.thank you
Looking at designing a new soundproof wall for TV and sound system I choose Soundstore. Was impressed with ease on website, the call from them to advise delivery details. Overal great customer service.
Amazing service, an absolute pleasure calling them, they always answered, we're very patient and helpful with my endless questions. Once ordered, my delivery arrived two days later. I wish every company I dealt with ran their business like these guys.
Items arrived promptly and well-packaged. The strip at the bottom of the door came with a tiny set of instructions which are not easy to follow; a video link would have been useful.
Wrong product sent on first delivery, but great customer service ensured correct item was promptly delivered and apologies accepted. The self adhesive Tecsound is easy to apply and is a quality acoustic product. Well done team.
