From £ + VAT per board

Square edge internal wall insulation – Beltermo Room

Beltermo Room wood fibre insulation boards are:-

  • a new type of highly insulating, dry-process square edge board.
  • suitable for application directly to all types of masonry.
  • simple, breathable, renderable wood fibre insulation boards.
  • useable with plastered finishes or battened finishes.

Product overview

Where is it used?

  • Beltermo Room wood fibre boards are square edged and used for internal solid wall insulation or for direct fixing to boarded timber frames.
  • Beltermo Room can also be used to line CLT/LVL panelling and provide a plasterable surface.
  • Beltermo Room boards can also be used for insulating solid floors.

How is it used?

  • Beltermo Room boards are always laid in a landscape orientation.
  • As internal solid wall insulation Beltermo Room boards should start at or above the external ground level and laid in a brick bond pattern with vertical joints overlapping by at least 300mm. They are not suitable for below ground use.
  • Apply a 5-10mm layer of Baumit Viton Fein plaster direct to the wall and comb with a knotched trowel to ensure and even thickness.
  • Where the surface is much rougher, flush-up the surface of the wall with either a lime plaster or the Baumit Viton Fein before applying the boards.
  • Once the boards are in the correct position they can be fixed with 5-6 masonry fixings, spaced evenly across the surface of the board.
  • Once the clay backing plaster has stiffened (usually 24 hours later) the UdiMULTIGRUND vapour regulating plaster can be applied to the surface. Apply a 4-5mm coat, incorporating the UdiREINFORCEMENT mesh and finish flat.
  • After 4-5 days the surface can be skimmed with a lime or clay skimming plaster.
  • For detailed guidance on installing and direct plastering the boards, please see our installation guide – Internal wall insulation with lime plaster finish
  • For detailed guidance on installing and using a plasterboard finish, please see our installation guide – Internal wall insulation with plasterboard finish

How much will you need?

  • Each Beltermo Room Insulation board is 1250 x 580mm or 0.725m2.
  • We stock boards in 40, 60 and 100mm thicknesses but other thickness are available on request.
  • Beltermo Room is available by the board or in full pallets with a 10% discount over the single board price

Frequently asked questions

What is their thermal conductivity?

The Beltermo Room boards have a conductivity of 0.038 W/mK, which is very low for this type of material.

See it in action

Internal wall insulation with lime plastered finish

Internal wall insulation with plasterboard finish

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]Weight [kg/sqm]Board dim. [mm]Number of boards per palletPallet covers [sqm]Pallet weight [kg]Pallet dim. [cm] [LxWxH]single board costboard in full pallets
405.21250 x 5806043.2200125 x 120 x 135£9.00£8.10
607.81250 x 5804028.8200125 x 120 x 135£13.50£12.15
100131250 x 5802417.28200125 x 120 x 135£22.51£20.26

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.