Why choose HardieFloor dB?

  •  Direct to joist
  •  Supports all floor finishes
  •  Enhanced acoustic performance
  •  Water resistant

The smart silent floor

A floor should be seen, not heard. Often the cause of costly remedial work after a project is complete, squeaking timber boards are also the most frequent noise related complaint made to the NHBC. Install HardieFloor dB® acoustic flooring and you’ll install a floor with superior acoustic performance, that doesn’t expand or contract like wood substrates.

In fact, at 27 mm, HardieFloor dB is a smart floor that provides the lowest height for direct to joist acoustic flooring in the market. Our acoustic flooring gives you all the benefits of a HardieFloor® structural floor, making it the perfect partner for underfloor heating.

The premium robust floor

Why settle for cheap alternatives? With a HardieFloor dB structural flooring on your next project you’ll have the peace of mind that your floor won’t warp.

  • Our cement formulation makes HardieFloor the durable solution for joisted floors
  • Provides up to 75% less build-up than traditional screed
  • As part of a system HardieFloor dB surpasses Part E of Building Regulations for new build projects with impact and airbourne noise
  • High point load gives up to 67% less deflection than conventional wood products
  • Cfl-s1 rating in accordance with EN13501-1


Quick & easy installation

HardieFloor has a revolutionary slim-line tongue and groove inter-lock system for easy installation.

  • Install direct to joist
  • Tile direct – no additional overlay or priming required


The floor that stays strong

HardieFloor boards don’t expand or contract like wood substrates. Robust and long-lasting, tiled floors remain crack-free.

  • Moisture resistant, robust, dimensionally stable and ready to tile
  • No need to cover installed floor when weather turns bad during build – once installed it can be left exposed to the weather for up to 90 days. Nor is there need for a priming or overlay: tiles can be directly fixed to the boards
  • Slimline HardieFloor boards make for a seamlessly smooth transition between rooms


Enhance your underfloor heating

Underfloor heating brings you the comfort of warm living. HardieFloor superior thermal transmission allows more heat to transfer where it should: into the room.

  • Our boards conduct heat over 30% more efficiently than chipboard or wood
  • HardieFloor remains solidly intact. It doesn’t expand, contract or squeak like wood due to temperature changes


The silent floor

From new build to refurbishment projects, for the ultimate acoustic performance choose HardieFloor dB.

  • Achieve an impact noise level of 54dB and an airborne level of 55dB when using HardieFloor dB

Book a CPD

James Hardie offers a range of CPD courses for industry design professionals. All of our CPDs are RIBA-approved courses which can be used to claim CPD points.

 Tel: 0800 068 3103
 Email: info@jameshardie.co.uk

The build was in winter and we had lots of rain. Luckily, the board is weather proof. It meant we didn’t have to replace any product.

Richard Milton, senior technical manager at Millgate Homes

HardieFloor dB versus HardieFloor

  • Combines the advantages of HardieFloor with optimum acoustic performance
  • Features a robust integrated matting for best noise resistance
  • HardieFloor dB acoustic floor surpasses the requirements set out in Part E of Building Regulations for new build projects with impact noise to only 54dB and airbourne noise to an outstanding 55dB

Get the looks

Every house forms part of its scenery, whether urban or rural. That’s why James Hardie products are made to fit in seamlessly. We help to build homes that are in perfect harmony with their surroundings.

Discover ideas & inspiration


Composition: Portland cement, sand, cellulose fibre, water, selected additives
Dimensions: 500 x 2400 x 27 mm
Weight: 35 kg
Accreditations: CE & BBA 13/5057
Fire rating: Cfl-s1
Warranty: 10 years

Product faq

Why is HardieFloor® and HardieFloor dB® made in a sheet size of 500mm?

HardieFloor® and HardieFloor dB® has a size of 500mm to cut down on weight, making it easier to carry. The critical dimension of the board is the length of 2400mm.

Do I need to protect the floor from the weather during the build?

No, the HardieFloor range is weather resistant and can be left exposed to the elements for up to 90 days.

Can I install electric floor heating mats onto HardieFloor®?

Yes, you can in accordance with the heating manufacturers installation instructions.

Is HardieFloor® suitable for use with wet under floor heating?

Yes, due to its unique properties, HardieFloor® will not swell or buckle due to the temperature changes occurring when the under floor heating is in operation. Its thermal conductance properties mean your heating system will react faster and conduct more heat to warming the room.

Is HardieFloor® structural flooring compatible with under floor heating?

Yes, HardieFloor® boards can be used in conjunction with both wet and electric systems.