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IKO Ruberoid 4mm Polyester Universal Torch-On Roofing Underlay - 8m x 1m

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£51.90 Incl. VAT
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Utilises a 170 g/m2 polyester base, coated with APP modified bitumen. Finished with sand on the top and surfaced on the underside with flame dispersible polyethylene. For use as a high performance underlay or as a top layer (where used as a top layer it should be finished with either chippings, promenade tiles or solar reflective paint).


Torch-on roofing membranes should be installed in accordance with BS 8217: 2005, Code of Practice for Reinforced bitumen membranes for roofing, and to IKO recommendations. The application should follow the recommended good practices for torch-applied membranes. Care must be taken when applying torch-on in close proximity to combustible materials,  decorative coatings and heat-sensitive materials.

Apply torch-on roofing by melting the heat dispersible backing and coating to create a molten flow in front of the roll. The flame of the torch should be applied at the low point where the roll meets the underlay. As the film and bitumen melt, roll the roofing forward. NB. A bead of bitumen must exude from all lap joints to ensure a seal.


  • Polyester or glass fibre base options.
  • High softening point bitumen coating.
  • Durable performance.
  • Strong and flexible.
  • Torch application.
  • Easily detailed.

Typical System

  • Venting Layer.
  • 2mm Underlay.
  • 4mm Mineral Cap Sheet (Green, Blue Grey, Brown Etc).
  • Replace Mineral Cap Sheet with 4mm Sanded if laying Promenade Tiles.


Length 8m Thickness 2mm Width 1m


Type Underlay Colour Black Application Torch-On Size Of Shed Roof 8m2

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5 / 5 1 reviews
Mr Duthie
25th January
Good quality
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IKO Ruberoid 4mm Polyester Universal Torch-On Roofing Underlay - 8m x 1m

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