IKO Glass Fibre Underlay 3B

IKO Glass-Fibre Underlay is a waterproofing membrane, consisting of a strong glass fibre base coated with oxidised bitumen. It is sand finished on both surfaces. Used as an economical underlay (or intermediate layer) in a built-up felt roofing, and is usually fully bonded in hot bitumen. It is also used as an underlay to bitumen shingles in a pitched roof application.

This range of IKO glass-fibre roofing membranes consists of underlays and cap sheets, complying with former BS 747: 2000 Type 3 where applicable. The products usually have an oxidised bitumen coating and are either sand or mineral surfaced. These products are usually applied with hot bonding bitumen, or cold bitumen adhesive.

IKO Glass Fibre Underlay 3B

Key Benefits to your project

  • Formerly BS 747: 2000 Type 3B

  • British Standard glass-fibre based

  • Economic roofing materials

Technical Information

Product Information

By Project Type: DIY, New Build, Refurbishment

Installation Method: Pour and Roll

Material: Bituminous

Product Colour: Black

Product Finish: Sand

Product Type: Bituminous Membrane - DIY/Merchants

Profession: Export Customers, Home Owners, Merchants & Resellers

SKU: 03842000

Sector: Domestic, Private Housing, Social Housing

UK Manufacturing:

Key Performance Criteria

Accreditation: ISO 14001, ISO 45001, ISO 9001

Certification: CE

Membrane Carrier/Base: Glass


Length mm: 20000

Weight kg: 35

Width mm: 1000

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