IKO Systems Torch-Free Underlay

IKO Systems Torch-Free (T-F) Underlay is a polyester reinforced bitumen membrane, used as an underlay within a built up roofing system; the membrane is coated on both sides with a self-adhesive bitumen SBS elastomeric coating. The upper surface is protected with a protective film that facilitates rapid bonding of the waterproofing layers. The self-adhesive coating underside is protected by a release film.

The underside has a self-adhesive bitumen coating that provides a 40% partial bond allowing vapour dispersion between the membrane and substrate and also has a 75mm selvedge that is facilitates a rapid installation of the lap joints.

The IKO Systems T-F Underlay is used as a partially bonded underlay within a built up roofing specification system. It is to be used only for main flat roof areas and roof pitches up to 5° if reliant on adhesion alone. For roof pitches over 5° this underlay should also be mechanically fastened in accordance with BS8217 table 5 or the IKO specification document.

The unique self-adhesive profile of the IKO Systems T-F Underlay allows for a partial bond to be achieved to the substrate therefore reducing the risk of blistering from any trapped vapour.

Key Benefits to your project

  • Partial Bond to Prevent Blistering from Trapped Moisture

  • Flame-Free Application

  • Rapid Installation

  • Surface Protection from the Film Finish

Technical Information

Product Information

Brand: IKO Systems

By Project Type: New Build, Refurbishment

Installation Method: Hot Air Weld Lap Bond, Partially Bonded, Self-Adhesive

Material: Bituminous

Product Colour: Black

Product Finish: Protective Film

Product Type: Bituminous Membrane - Commercial

Profession: Export Customers, Installing Contractors, Specifiers & Designers

Roof Build Ups: Warm Roof

Sector: Community & Amenity, Education, Health, Hotel & Leisure, Industrial, Mixed Use, Offices, Retail, Social Housing, Utilities

UK Manufacturing:

Key Performance Criteria

Accreditation: BES 6001, ISO 14001, ISO 45001, ISO 9001

Certification: CE

Membrane Carrier/Base: Polyester Reinforced Bitumen Membrane

Membrane Modifier: SBS


Length: 16

Length mm: 16000

Weight kg: 40

Width: 1

Width mm: 1000

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