Universal wood fibre insulation board - Beltermo Ultra


Beltermo Ultra Universal wood fibre insulation boards are:-

  • a medium density, dry-fibre insulation board, suitable for sarking insulation or for rendering.
  • high compressive strength boards, perfect for confident counter-battening.
  • ideal for forming a warm roof which is completely vapour permeable with good thermal mass and acoustic insulation.
  • suitable for external and internal use with suitable plasters and renders. 

Where is it used?

  • On top of your rafters, preventing thermal bridging and keeping noise out, especially for loft conversions.
  • Behind any cladding on walls on timber frames or masonry.
  • As an internal plaster carrier.
  • As an external render carrier for sheltered locations.

How do I use it?

  • The Beltermo Ultra wood fibre insulation sarking boards should be laid on top of the rafters and fixed in place with counter-battens. 
  • For roofing applications the first row should start at eaves level and working in rows, work your way up the roof. 
  • To reduce waste the overhang from the first row should be trimmed off and used to start the second row and so on.
  • For use behind cladding the same principles apply.  When working on masonry structures, unless the wall is very flat, timber battens should be fixed to the surface first with SteicoFlex flexible wood fibre insulation between the battens. The Beltermo Ultra can then be fixed to these battens, avoiding any voids behind.
  • Alternatively, apply a levelling plaster to the surface of the wall, texture with a knotched trowel and fix the boards to the surface whilst still wet.
  • Any cut joints or corners can be taped with Ampacoll XT tape to ensure weather-tightness. 
  • Boards are not suitable for walking directly on unless supported underneath.
  • For installations where the Beltermo Ultra will be left exposed for more than 4 weeks or where metal roofing is to be used, instal Ampatop Aero breathable membrane over, prior to fixing of the counter-battens.
  • For rendering applications please contact us for more information

How much will I need?

  • The Beltermo Ultra wood fibre insulation sarking boards typically cover an area of 1870 x 570mm (1.07m2) but the exact board sizes vary slightly, depending on their thickness. The 40mm and 50mm Beltermo Top boards are larger and cover an area of 2480 x 580mm (1.438m2).
  • Allow 5-10% wastage depending on the complexity of the roof/facade.
  • Available by the board or in full pallets with a 10% discount over the single board price.
Product board size pallet size
40mm Beltermo Ultra 1230 x 580mm (0.7134m2) 60 sheets, 42.80m2
50mm Beltermo Top 1875 x 575mm (1.078m2) 44 sheets, 47.43m2
60mm Beltermo Top 1875 x 575mm (1.078m2) 38 sheets, 40.96m2
80mm Beltermo Top 1872 x 572mm (1.07m2) 30 sheets, 32.10m2
100mm Beltermo Top 1872 x 572mm (1.07m2) 22 sheets, 23.54m2
120mm Beltermo Top 1872 x 572mm (1.07m2) 20 sheets, 21.40m2

 



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