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Cellecta ScreedBoard 20 – Underfloor Heating Overlay board

Cellecta ScreedBoard 20 is a high-density, gypsum-based acoustic flooring deck that can be used to improve acoustic performance and safely overlay underfloor heating.

Because of its high thermal conductivity, Cellecta ScreedBoard 20, is an ideal overlay board that both protects underfloor heating and allows it to run efficiently with faster reaction times.

ScreedBoard 20 can also be laid directly onto routed insulation, reducing installation time, while also offering a minimal increase in floor height – due to its low 20mm profile.

Does Cellecta ScreedBoard 20 offer floor soundproofing?

To meet UK building regulations, planners and architects will need to consider both aesthetics and performance – and Cellecta ScreedBoard 20 does both, offering excellent floor soundproofing for both airborne noise and impact noise:

Airborne noise is an example of sound pollution that is transmitted through the air and includes common sources of disruption, like talking, laughter, noise from the TV or radio, and dogs barking.

Impact noise, on the other hand, travels through buildings or solid materials via vibrations and sound waves. This includes footsteps, door slamming, and the noise of moving furniture.

Because of this acoustic insulation, Cellecta ScreedBoard 20 is the ideal acoustic flooring option for flats, apartments, hotels, schools, and multiple-storey buildings of all types.

Why choose Cellecta ScreedBoard 20 for acoustic floor coverings?

Give the effect of screed without the extra steps

Cellecta ScreedBoard 20 looks and feels like a screed whilst eliminating the mess, fuss, and drying times associated with a wet trade.

Why run the risk of poor or incomplete curing and awkward logistics when you can get the same benefits with an acoustic flooring system?

Suitable for finished flooring of all types

Thanks to the interlocking edges of Cellecta ScreedBoard 20, it is the optimal solution for meeting building regulations and being able to choose from a wide range of finished flooring options, including:

  • Tiles, including ceramic tiles
  • Amtico vinyl flooring
  • Laminate wooden flooring
  • Carpet
  • And many more

Tiles can also be laid directly onto the ScreedBoard 20 without the need for overlaying with plywood – saving time and money and helping complete jobs faster!


Cellecta ScreedBoard 20 is Robust Detail Compliant for E-FS-3, E-FT-5, and E-FT-6 and allows underfloor heating to be incorporated into the acoustic flooring while meeting building regulations in England and Wales.


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At a glance features and benefits of Cellecta ScreedBoard 20

  • Only 20mm thick
  • Suitable for timber, steel, and concrete floors
  • F-FT-4 Robust Detail-compliant 
  • Meets UK building regulations
  • Robust Detail treatment for E-FS-3, E-FT-5, and E-FT-6
  • Hard-wearing and durable surface designed to look and feel like a screed
  • Easy to cut and install – leave the tools at home and complete cuts with a hand saw while interlocking edges mean no screws are required to complete installation.
  • Excellent impact and airborne performance
  • Compatible with most floor finishes, including laminate wooden flooring, ceramic tiles, Amtico vinyl flooring, and carpet
  • Manufactured from 100% recycled materials
  • Can be used on floating floors and on pre-existing timber floor joists

Why choose an acoustic flooring system from JCW Acoustic Flooring?

First formed in 2004 as a specialist acoustic division, JCW now has over 15 years of experience in installing all types of Robust Detail compliant acoustic flooring solutions.

Over this time, the expert team at JCW Acoustic Flooring has installed acoustic flooring for projects across the UK, as far north as Aberdeen and as far south as London Heathrow Airport – and everywhere in between.

We have the knowledge and expertise to ensure that your floating floors, floating acoustic floors, and floor soundproofing are supplied and installed expertly – giving you complete peace of mind and helping keep your project on time and within budget.

For a bespoke quotation, you can call us on 01204 548 400 or email us at enquiries@jcwgroup.co.uk and we’ll be in touch as soon as we can.

Frequently Asked Questions

What is Cellecta Screedboard 20?

Cellecta Screedboard 20 is a high-density overlay board, typically used for acoustic and underfloor heating applications.

Screedboard 20 is a 20mm calcium sulphate board that’s reinforced with cellulose fibre. It offers high thermal conductivity, allowing underfloor heating systems to operate efficiently, and helps to minimise running costs.

How does Cellecta Screedboard 20 compare with Cellecta Screedboard 28?

Cellecta provides Screedboard 20 and Screedboard 28.

Both are suitable for all types of steel, concrete, and timber floors. They look and feel like screed and can accept all types of floor coverings, including tiles.

However, Cellecta Screedboard 28 is used to combat unwanted airborne and impact noise, whereas Cellecta Screedboard 20 offers excellent acoustic properties and can also be used to overlay underfloor heating systems.

Another distinct difference between the two is their thickness. Screedboard 20 is only 20mm thick, whereas Screedboard 28 is 28mm thick, including a 20mm facing board and 8mm resilient layer.

Cellecta Screedboard 20 is also slightly lighter than Screedboard 28, weighing 25kg/m².

Whilst Cellecta Screedboard 28 is a robust treatment for E-FS-3, E-FT-5 and E-FT-6, Screedboard 20 is also FFT4 compliant.

For help determining whether Screedboard 20 or Screedboard 28 is right for you, call JCW Acoustic Flooring on 01204 548 400.

What are the benefits of using Cellecta Screedboard 20?

Cellecta Screedboard 20 offers numerous advantages.

Due to its low thermal resistance, combined with its rapid transfer of heat, this product is brilliant for underfloor heating applications.

Another benefit of using Cellecta Screedboard 20 is that, unlike standard screed, it provides quick drying times – meaning you won’t have to wait too long to apply the final floor covering.

Once installed correctly, it will accept a wide range of floor finishes – ranging from wooden flooring to carpet, ceramic tiles, and vinyl flooring.

Screedboard 20 is made from 100% recycled high-density gypsum and cellulose, making it an eco-friendly option for homes and businesses. On top of this, it delivers unparalleled performance and complies with Robust Detail.

If you’d like to know more about why you should consider using Cellecta Screedboard 20, don’t hesitate to get in touch today.

Is Cellecta Screedboard 20 easy to install?

Yes, you’ll be pleased to know that Cellecta Screedboard 20 is both quick and easy to install.

No screws are needed – just a tape measure, Pro adhesive, YELOfon FS/ES strip, hand or circular saw, 6-8mm packers, and club hammer.

When installing Screedboard 20 atop an underfloor heating system, you must make sure you carry out the necessary tests (including pressure testing), and never use the heat from the system to dry the adhesive.

With that said, the team at JCW Acoustic Flooring can take care of the installation for you – ensuring that the overlay boards are laid correctly and efficiently. We have been installing Cellecta Screedboard 20 for more than 15 years, and work hard to complete every job quickly without skimping on quality or safety.

To find out more about the process of fitting Screedboard 20, or to ask about the product, fill out the enquiry form above.

Is Cellecta Screedboard acoustic flooring suitable for concrete floors?

Some acoustic flooring types can only be used with specific sub-floor types, to provide the best acoustic performance, and meet UK Building Regulations/ Robust Detail.

Cellecta ScreedBoard 20, on the other hand, is one of the only acoustic flooring options that can be used on all types of steel, concrete and timber floors.

It can also be used on established timber floor joists – making it ideal for renovation and new-build projects.

To find out if Cellecta ScreedBoard 20 is suitable for your acoustic flooring project, read out today!

Cellecta Screedboard Case Studies

Schloss Roxburghe Hotel, Kelso

Schloss Roxburghe Hotel, Kelso

Cellecta Screedboard 28

Pendine Attractor Project, Pendine

Pendine Attractor Project, Pendine

Cellecta Screedboard 30

New Emissions Building, Bentley Motors, Crewe

New Emissions Building, Bentley Motors, Crewe

Cellecta Screedboard 20

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