IKO ULTRA Heat-Activated (H-A) Underlay

IKO ULTRA Heat-Activated (H-A) Underlay

Features and benefits

• Partial bond to prevent blistering from trapped moisture
• Flame-free application
• Rapid installation
• Surface protection from the fine granule finish

IKO ULTRA H-A Underlay is polyester reinforced bitumen membrane used within a built-up roofing system, The membrane is coated on both sides with self-adhesive bitumen SBS elastomeric coating. A fine mineral upper surface with a 75mm release film selvedge to facilitate rapid installation of lap joints is also present.

The underside has a self-adhesive bitumen coating that provides a 40% partial bond allowing vapour dispersion between the membrane and substrate. The underside of the IKO ULTRA H-A underlay has a 75mm selvedge that is facilitates a rapid installation of the lap joints. The self-adhesive coating is protected by a release film.

The IKO ULTRA H-A 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 H-A Underlay allows for a partial bondto be achieved to the substrate therefore reducing the risk of blistering from any trapped vapour.

The IKO ULTRA H-A Underlay has a 75mm selvedge lap with protective release film to the upper surface and a 75mm wide selvedge lap to the corresponding underside to facilitate rapid sealing of the side laps

Accreditations

Product attributes

MEMBRANE MODIFIER: SBS

MEMBRANE CARRIER: Polyester