
IKO Systems Torch-Free (T-F) Underlay
Product documents
TDS - Technical Data Sheet
Category: Roofing
Sector of Application: Flat
Product Type: Bituminous
Membrane Type: Underlay
Product Information
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.
- Partial bond to prevent blistering from trapped moisture
- Flame-free application
- Rapid installation
- Surface protection from the film finish
Colour: Black
Product Finish: Black
Installation Method: Self-Adhesive
Project Type: Commercial Large | Commercial Medium | Commercial Small


IKO Systems Torch-Free (T-F) Underlay
SKU | Unit weight kg | Width mm | Length mm | Product colour | Product finish |
62740000 | 40 | 1000 | 16000 |
Features and benefits
- Partial bond to prevent blistering from trapped moisture
- Flame-free application
- Rapid installation
- Surface protection from the film finish
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.
Accreditations





Product attributes
MEMBRANE MODIFIER: SBS
MEMBRANE CARRIER: Polyester
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