From £0.84 + VAT per board

Wood fibre underlay board – UdiSTEP

UdiSTEP wood fibre underlay is:-

  • available in 5mm and 8mm thickness
  • an eco friendly, breathable, high density wood fibre underlay board.
  • a highly effective sound deadening underlay for laminate or engineered timber floors.
  • a cushioning underlay for the Lithotherm underfloor heating system.
  • easy and quick to install.

Product overview

Where is it used?

  • Under any type of engineered, floating or laminate timber flooring.
  • On top of concrete screeds/slabs or over joists
  • As a cushioning layer under the Lithotherm underfloor heating tiles.

How is it used?

  • On floor joists, the boards can be simply laid on top of the joists and glued or stapled in position.
  • Make sure that there are no gaps between the UdiSTEP boards for maximum acoustic absorption.
  • When laying on insulated solid floor slabs, ensure the surface is clean and dry and has no lumps in it. UdiSTEP boards can be simply laid directly on to the slab.
  • They should be pressed up close to each other and there is no need to leave a gap around the perimeter for expansion.
  • If the slab isn’t insulated then lay insulation, such as UdiTHERM, prior to the UdiSTEP, ensuring the insulation has the correct compressive strength.

How much will you need?

Each UdiSTEP 8mm wood fibre underlay board is 1150 x 750mm or 0.8625m² per board. Allow 5% for waste, depending on the complexity of the area to be covered.

Frequently asked questions

What is their thermal conductivity?

The UdiSTEP boards do offer some insulation although as they are only 8mm thick this will be limited. The thermal conductivity of the board is 0.049 W/mK and they have a density of 230 kg/m³.

Technical details

Pricing & shipping

This product will require one pallet space and so shipping is likely to cost between £50 and £100, depending on where you live. Contact Us for a more accurate costing.

hinkness [mm]Board Dim.# [cm]Board coverage sqmNumber of Boards per palletCost – single boardCost – board on full pallet
579 x 590.4661390£0.84£0.75
8115 x 750.8625120£1.99£1.79

Book your free project consultation

We’d like to hear from you. Call us on 01392 861763 or email us at with any questions or comments.

If you can’t seem to find what you need on our website or you have large quantities of materials to purchase please contact us for a chat and we’ll offer you a more bespoke solution.

We’re normally open from 8.30 am to 5 pm Monday to Thursday, and 8.30 am to 1pm on Friday.