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Wood Fibre Insulation Sarking Boards – UdiTOP

UdiTOP wood fibre insulation sarking boards are:-

  • a wet process wood fibre board which is brilliant for keeping you warm and dry in winter.
  • high density and so great for summer heat shielding, keeping your home cool.
  • the best way to form a warm roof which is completely vapour permeable.
  • quick to form a weather-tight, bat friendly covering without using membranes/felt.
  • ideal for use in noisy or urban areas where their acoustic insulation really helps. 

Prices: from £8.65 + VAT per board

Wood Fibre Insulation Sarking Boards – UdiTOP

UdiTOP wood fibre insulation sarking boards are:-

  • a wet process wood fibre board which is brilliant for keeping you warm and dry in winter.
  • high density and so great for summer heat shielding, keeping your home cool.
  • the best way to form a warm roof which is completely vapour permeable.
  • quick to form a weather-tight, bat friendly covering without using membranes/felt.
  • ideal for use in noisy or urban areas where their acoustic insulation really helps. 

Prices: from £8.65 + VAT per board

Close-ups.

Take a closer look at this product with these additional images.

Image description: This shows the T&G profile on the edge of the UdiTOP wood fibre sarking boards.

Image description: This is an image of the larger format 22mm, 35mm and 52mm UdiTOP wood fibre boards.

“The UdiTOP wood fibre sarking boards are some of the most dense boards on the market, making them the best for keeping you cool in the summer and for sound insulation” – Chris Brookman

 

Product overview.

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.
  • Any roofs where bats live. They get tangled in breathable membranes so are are a great alternative.
  • As part of the Lithotherm underfloor heating system.

How do I use it?

  • The UdiTOP 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 UdiTOP boards 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 less than 52mm are not suitable for walking directly on unless supported underneath.
  • For installations where the UdiTOP wood fibre boards will be left exposed for more than 8 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
Technical Details

How much will I need?

  • The 22mm UdiTOP wood fibre insulation sarking boards are 2480 x 585mm or 1.45m².
  • The 35mm and 52mm UdiTOP wood fibre boards are 2475 x 575mm or 1.423m².
  • From 60 – 120mm the boards are 1855 x 575mm or 1.067m².
  • Allow 5-10% wastage depending on the complexity of the roof/facade.

What are their thermal conductivity and compressive strengths?

  • The 22, 35 and 52mm UdiTOP boards have a conductivity of 0.048 W/mK, a density of 260 kg/m³ and a compressive strength of 200kPa (kN/m²).
  • The 60, 80, 100 and 120mm UdiTOP boards have a conductivity of 0.046 W/mK, an average density of 240 kg/m³ and a compressive strength of 100kPa (kN/m²).

Suggested Construction Details

Suggested plinth detail – Wood fibre external insulated timber frame – Timber cladding

Suggested Eaves/Roof detail – Wood fibre external insulated timber frame – Timber cladding

Suggested Window Reveal plan detail – Wood fibre external insulated timber frame – Timber cladding

Suggested window reveal section – Wood fibre external insulated timber frame – Timber cladding

 Suggested flat roof detail

Suggested green roof detail

 Suggested eaves detail

 Suggested ventilated ridge detail

 Suggested insulated ridge detail

 Suggested chimney detail

 Suggested roof light detail

Product overview.

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.
  • Any roofs where bats live. They get tangled in breathable membranes so are are a great alternative.
  • As part of the Lithotherm underfloor heating system.

How do I use it?

  • The UdiTOP 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 UdiTOP boards 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 less than 52mm are not suitable for walking directly on unless supported underneath.
  • For installations where the UdiTOP wood fibre boards will be left exposed for more than 8 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 22mm UdiTOP wood fibre insulation sarking boards are 2480 x 585mm or 1.45m².
  • The 35mm and 52mm UdiTOP wood fibre boards are 2475 x 575mm or 1.423m².
  • From 60 – 120mm the boards are 1855 x 575mm or 1.067m².
  • Allow 5-10% wastage depending on the complexity of the roof/facade.

What are their thermal conductivity and compressive strengths?

  • The 22, 35 and 52mm UdiTOP boards have a conductivity of 0.048 W/mK, a density of 260 kg/m³ and a compressive strength of 200kPa (kN/m²).
  • The 60, 80, 100 and 120mm UdiTOP boards have a conductivity of 0.046 W/mK, an average density of 240 kg/m³ and a compressive strength of 100kPa (kN/m²).

Suggested Construction Details

Suggested plinth detail – Wood fibre external insulated timber frame – Timber cladding

Suggested Eaves/Roof detail – Wood fibre external insulated timber frame – Timber cladding

Suggested Window Reveal plan detail – Wood fibre external insulated timber frame – Timber cladding

Suggested window reveal section – Wood fibre external insulated timber frame – Timber cladding

 Suggested flat roof detail

Suggested green roof detail

 Suggested eaves detail

 Suggested ventilated ridge detail

 Suggested insulated ridge detail

 Suggested chimney detail

 Suggested roof light detail

Material in action.

This image shows the UdiTOP being laid over a layer of UdiTHERM square edge wood fibre boards on top of rafters. This allows you to get very thick layers using the wet processed denser wood fibre boards as these don’t generally come any thicker than 120mm.

Prices & Shipping

Here you will find pricing and shipping estimates. To get a fixed quote, please call our technical team on 01392 861763 or get in touch via the form below.

UdiTOP wood fibre sarking boards cost as per the below individual prices with a discount of 10% on full pallets.

Thickness [mm] Weight [kg/sqm] Board dim. [cm], Area [m²] Number of boards per pallet Pallet covers [sqm] Pallet weight [kg] Pallet dim.
[cm] [LxWxH]
single board cost board in full pallets
22 5.7 248 x 58.5, 1.45 104 150.8 875 250 x 120 x 125 £10.36 £9.32
35 9.1 247.5 x 57.5, 1.42 66 93.92 875 250 x 120 x 125 £16.46 £14.82
52 13.52 247.5 x 57.5, 1.42 44 62.61 870 250 x 120 x 125 £24.48 £22.03
60 14.4 185.5 x 57.5, 1.067 36 38.41 575 190 x 120 x 125 £19.46 £17.51
80 19.2 185.5 x 57.5, 1.067 28 29.88 595 190 x 120 x 125 £25.79 £23.21
100 24.0 185.5 x 57.5, 1.067 22 23.47 590 190 x 120 x 125 £32.33 £29.10
120 28.8 185.5 x 57.5, 1.067 18 19.21 580 190 x 120 x 125 £38.92 £35.03

Carriage is typically calculated at £130 + VAT per pallet and all orders will be sent on a pallet. This price does vary if delivery is required to remote locations. We are also able to stack pallets in some cases which may reduce the transport cost. If you require only a few boards we may be able to get slightly cheaper shipping so please contact us for a more accurate price.

Request an estimate.

In summary, if you are looking for more than just a builders’ merchant, we might be the guys to talk to.

Request an estimate.

In summary, if you are looking for more than just a builders’ merchant, we might be the guys to talk to.

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