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Fibreboard 5.5mm Underlay (10m2 Coverage)

Product Code: ACC003
  • £4.00 per m² £40.00 Per Pack
  • RRP £6.00 per m²
Want it by Tuesday 23rd July? Order within 1 day, 15 hours
Need help measuring your room? Click here ›
Want it by Tuesday 23rd July? Order within 1 day, 15 hours

Fibreboard 5.5mm Underlay 10m2
Thickness: 5.5mm
Concrete Subfloor: No
Moisture Barrier: No
Coverage: 10.03m2
Underfloor Heating: No
Tog Rating: 1.1


Fibreboard underlay is perfect for installation under your floor to help improve insulation, dampen sound, and to help level uneven subfloors  - though we’d always suggest that you make sure your subfloor is completely level before laying an underlay!

Fibreboard underlay is a premium natural insulating under floor board for use with all laminates and glue-less woods where a floating installation is required. It comes in "tiles" which cover an area of 10.03m2 per pack.

Each board is 5.5mm thick which helps with sound reduction, and this underlay is perfect where sound reduction is needed. For example, in rooms with high ceilings, or apartment buildings with neighbours underneath. You might also consider buying it as a Christmas present for your neighbours above, too!

This underlay shouldn’t be laid on concrete, as it doesn’t contain a moisture barrier. Concrete subfloors will generally leak moisture over time due to the nature of the material, and you’ll need a special underlay with a moisture barrier for a concrete subfloor.

For more information, check out our guide, Why You Need To Underlay Your Floor.


Review Summary - 4.9 out of 5 based on 14 ratings.
Sort reviews by:

Sorry don’t have a picture but these are so easy to use. Place down cut to size simple as that. Nice and thick cannot fault them.

March 16, 2019 |

Really happy with the purchase does the job great.

January 18, 2019 |

Great underlay easy to lay. The packs are much larger than in the shops great value for money. The image shows 1 pack in a 18ft long room

April 20, 2018 |

Looks a good product haven't used yet as decorating

March 28, 2018 |

March 9, 2018 |

Not yet laid but looks good for the job

February 7, 2018 |

Spot on from order to finished floor. Easy to order, and you are kept informed throughout the ordering and delivery process - Even the delivery man lets you know he's on his way and gives an approximate delivery time.

Great value underlay. Allows you to easily run speaker cables etc with a minimum of fuss

November 19, 2017 |

excellent product,covers a lot more than you think it will.Arrived in good condition on the day specified. All in all good product,excellent service

November 17, 2017 |

Easy to lay and makes a perfect surface on which to lay the laminates we used. Recommended.

October 12, 2017 |

Fibreboard 5.5mm Underlay (10m2 Coverage)

May 26, 2017 |

March 18, 2017 |

Good Product

I found this product easy to install and it help reduce sound levels. The service from this website was very good.

September 17, 2012 |


Really good quality product. It significantly reduced the noise produced from walking on the laminate.

September 17, 2012 |

Very impressed

Very impressed, installed under the laminate in the kids room upstairs. Noise level is reduced, very happy!

August 8, 2012 |

Standard Delivery



  • Monday - Friday kerbside delivery
  • Dates available will be 3 working days after the date you placed your order.
  • Between 8 am and 6.30pm on your chosen day
  • Delivery must be checked and signed for


Express Delivery£40


  • Next day Monday - Friday delivery when ordered before 2 pm
  • Between 8 am - 6.30pm
  • Delivery to kerbside only
  • Delivery must be checked and signed for


Saturday Delivery



  • Saturday date that suits you
  • Delivery between 8 am and 2 pm
  • Delivery to kerbside only
  • Delivery must be checked and signed for


Timed Delivery£20 extra
  • Chose a two-hour time window for your standard or express delivery 
Accessories Delivery£15


  • If you are only ordering accessories there is a £15 delivery charge
  • Next day delivery when ordered before 2 pm
  • Kerbside delivery only
  • Delivery must be checked and signed for


For full delivery information and our terms and conditions please see our full policy here.

14 day hassle free returns

We offer a 14-day returns policy, simply fill out this form to start the returns process. A refund will be issued 3 - 5 bank working days after goods have been received and checked in our warehouse. For further information please see our returns policy here