STS TG4 Acoustic Flooring Board 18mm

Shipped by iKoustic from the UK


£41.94 inc. VAT

Delivery and Returns Policy

  • Performance: 33dB.*
  • Dimensions: 1200mm x 600mm x 18mm
  • Weight: 18.8kg
  • Mass: 26.1 kg/m²
  • For: Homes and commercial installations.
  • Compliance: Compliant with Part E Building Regulations (England, Wales, Northern Ireland and the Republic of Ireland).*
  • Installation: See our install section below.
  • Where: Structural flooring replacement where additional mass is needed for airborne sound reduction.

A load-bearing, cement particle board for the improvement of airborne noise in flooring systems.

STS TG4 Acoustic Flooring Board 18mm

A load-bearing acoustic flooring board at over double the density of standard P5 chipboards to improve the airborne sound reductions transferring through a floor. Commonly installed on top of our P8 isolation strip a floating floor system can be created. Floating floor systems are some of the highest performing systems for reduction of sound and vibration through floor/ ceiling partitions and when using the STS TG4 acoustic flooring board in place of conventional structural boarding minimal height is added on to the floor build up. The TG4 acoustic flooring boards can be installed on timber joist or metal structures with tongue and groove on four sides to give an airtight seal. 

As fibre cement is water resistant, this means the acoustic flooring board can also be used in a wide range of applications including: wet rooms, kitchens, outdoor tiled areas, flat rooms, balconies, garden rooms and many more.

The high thermal conductivity of the cement fibre board allows the cement fibre to absorb and release heat much more efficiently than chipboard, therefore enhancing the performance of you underfloor heating.

Further reductions in both impact and airborne sound transmission can be gained by using a suitable MuteMat underlay on top of the STS TG4 acoustic flooring board. The performance can even be further increased with the addition of Tecsound, which will help to further reduce sound and vibration for areas requiring higher levels of performance.

STS TG4 Acoustic Flooring Board Coverage Calculator
Single Product Calculator – STS TG4
Waterproof construction board

Water Resistant acoustic flooring board

Ideal for use in bathrooms and areas that may get wet. STS construction board will not rot or delaminate under damp conditions.

Fire rated

Fire resistant construction board

STS construction board has a Euroclass A1 fire rating.

Construction board acoustic underlay

Prevents Flex

Some Soundproof underlays like MuteMat 3 have foam that can be compressed as this helps prevent impact noise. With tiles and LVT this compression can cause issues. Construction board prevents this and adds acoustic protection.

packaging boxes wrapped plastic pallets with hand pallet truck shipping warehouse cargo shipment

Construction Board UK shipping

Our construction board is shipped on a pallet. Unlike others, we hold stock of all of our products ready to dispatch same day Monday to Friday. We also offer next day delivery for orders placed before 1pm Monday to Friday.

Underfloor heating

High thermal conductivity

STS TG4 board has a the ability to conduct heat much more efficiently than chipboard, therefore enhancing the performance of you underfloor heating.

The STS TG4 acoustic flooring board are a direct replacement for conventional structural floor boarding products and materials. The installation of the boards are very similar to a typical tongue and groove flooring installation with a few changes to tools and adhesives, more details can be found below:

Step 1Step 2Step 3Step 4
Cut boards to size Cut STS Construction board TG4 using a circular saw fixed with a vacuum extractor and an STS PCD Saw Blade. This method will cut boards easily and mitigate dust. Boards are fixed with board text facing up.Stick boards to joists STS Construction board TG4 can be fixed to timber or steel joists installed at maximum 600mm centres. To achieve an acceptable finish, it is important that floor joists are level. Apply a bead of STS Mega Strength PU Adhesive to the joist, then position the first board.Secure with screws Secure with 12 x 50mm STS Fibre Cement Board Screws, placed a minimum of 12mm from the square edge and 5mm from the side of the joist. Ensure screws are placed a minimum distance of 25mm from the tongue and groove edge.Apply adhesive to groove Lay in a brick bond pattern. Tongue and groove joins do not need to end on a joist but all square edges should be fully supported. Secure subsequent boards by applying Mega Strength PU Adhesive along the length of the board’s groove, before inserting the tongue of the next board. Ready to tile or install other surface finish immediately.

For further reductions in sound the STS TG4 boards can also be installed in a floating floor system.


Boards should be stored and handled in a manner to prevent deterioration and damage. The product should be protected from atmospheric actions, excessive humidity and temperature changes, such as rain, sun, winds and moisture. STS TG4 boards must always be stored flat. If boards are stored outside they must always be fully covered with a waterproof tarpaulin.


STS Construction Board TG4 must be protected from moisture and weather prior to installation. Although they will not deteriorate after installation even if subject to adverse weather conditions, it is recommended that if this is likely to happen a coat of waterproof primer, such as SBR, will reduce moisture ingress. Before the final finish is laid, boards should be thoroughly cleaned and allowed to acclimatise to the final ambient temperature and moisture conditions of the building. If piped under floor heating is installed this can be turned on to assist with acclimatisation.

Find out more information about STS TG4 Acoustic Flooring Board 18mm by downloading the guides below.

Product Data Sheet 

If you are looking to specify this product for a build, please refer to our downloads tab for technical product or systems information.

Technical Support
Should you require further technical assistance in specifying our products, please contact us and ask for our Technical Rep, Gabriel Whittle.

BIM Objects
iKoustic also supply a selection of BIM objects via our NBS profile, which can be found here. 

Important Information

Our products contain a high level of mass. If there are any structural concerns you will want to consult a Structural Engineer to discuss your requirements.

*Our Typical Performance Results and Noise Reduction Guidance are provided to indicate the results that have been achieved in previous tests but are not guaranteed to a specific site as multiple factors can affect this, you can view their variants on our ‘Featured Systems’ tab.

Delivery information.

If you place an order online it’s likely we will call to discuss delivery to make sure it runs as smoothly as possible. Deliveries can arrive on a large vehicle. If there are access issues or HGV restrictions, please do let us know in advance as our website options are given in good faith of no restrictions. All of our deliveries must be signed for so you will need to ensure someone is on the premises on the day of delivery.

Delivery Times