From £7.61 + VAT per board

Wood fibre reveal insulation board

UdiUnger-Diffutherm 20mm reveal boards are:-

  • a tough, renderable, high performance wood fibre insulation board.
  • a great way to finish insulation systems off around windows and doors
  • the best way to create neat, renderable edges to all Unger wood fibre insulation systems.
  • durable with good resistance to weather.

Product overview

Where is it used?

  • UdiUnger-Diffutherm 20mm reveal board finishes the edges of all the Udi wood fibre insulation systems.
  • It is used internally and externally to provide insulation to door and window reveals.

How is it used?

How much will you need?

  • Each UdiDiffutherm 20mm reveal board is 1300 x 800mm or 1.04m2.
  • Allow 5% for waste depending on the complexity of the area to be insulated.

Frequently asked questions

What happens if they get wet?

Its never ideal to let wood fibre insulation boards get soaked by the rain, however, should it happen they will dry out again and be just as robust.

What is their thermal conductivity?

The boards are very high density at around 270kg/m³ and so their conductivity is a little higher than other wood fibre boards at 0.048 W/mK. However, they make up for this by being much better at absorbing sound and also by adding a lot of thermal mass the a structure.

See it in action

Internal window reveals in masonry walls

External window reveals in timber frame walls

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.

 Thickness[mm]Board Dimensions [mm]No. of boards in a palletArea of a board[m²]Pallet covers [m²]Weight per pallet [kg]Cost
201300 x 800561.0458.24325£7.80

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.