ISOLINE LOW LINE is the only sub-roof system in the UK to be BRE tested and BBA accredited to as low as a 10-degree pitch. Made from approximately 50% recycled material and specifically designed for use on low pitch roofs, this lightweight bituminous sub-roof system becomes the primary waterproofing layer and is shielded from elements such as wind and rain, making it an exceptional long-lasting waterproofing solution.

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Compatible with all roof tiles, whether slate, concrete or clay, the ISOLINE LOW LINE system addresses common challenges faced with low-pitched roofs, which are often applied to extensions. The limited selection of tiles suitable for very low-pitched roofs can be problematic for homeowners, builders and contractors.

This is where sub-roof systems like ISOLINE LOW LINE can change the dynamics of traditional roof structures. Instead of relying solely on tiles for waterproofing, the sub-roof becomes the main waterproofing layer, allowing the tiles to serve as a secondary defence against water ingress. This innovation offers flexibility to select new tiles for improved aesthetics and functionality or to use existing tiles.

If you're working on a project that requires a guaranteed waterproofing solution, then pleas get in touch to discuss how ISOLINE LOW LINE can help you overcome challenges with: 

  • Low pitches
  • Heritage & Restoration 
  • Refurbishments & Retrofit
  • Pitched House Extensions

Get in touch today! Please submit the webform below, or email: [email protected] or call 0207 727 0533, and our team of experts will be available to assist you: