In low-pitch roofing, there is no room for error. Remedial work on a failed system impacts margins and can damage reputations. When you are managing tight construction schedules, you need a system that lets you get it right first time.
The ISOLINE LOW LINE sub-roof system acts as a secondary barrier beneath clay, slate, or concrete tiles. It delivers guaranteed waterproofing for pitches as low as 10˚ for all roof tiles.
Whether you are preserving historic buildings or modernising an existing structure, this system eliminates the risks inherent to low-pitch designs.
Engineered for Waterproofing Challenges
- Guaranteed Waterproofing Down to 10˚: ISOLINE LOW LINE forms an impenetrable sub-roof, allowing you to safely specify or install premium tiles far below standard pitch limits
- The Ultimate Solution for Refurbishments: Inject new life into failing structures. It integrates seamlessly over existing rafters, masking structural irregularities and upgrading the building’s thermal and moisture performance without a total structural overhaul.
- Premium Waterproofing for Heritage Buildings: Preserve the past without compromising on modern performance. It allows traditional, historic clay and pantiles to be re-laid on low pitches, maintaining strict aesthetic compliance while providing hidden, weather protection.
- Get It Right First Time: Avoid costly callbacks and project delays. Once installed, the system immediately weatherproofs the building, allowing internal trades to start work straight away while guaranteeing long-term, performance.
| FEATURE | PROJECT/SITE BENEFIT |
| Low-Pitch Performance | Guaranteed waterproofing down to 10˚ |
| Project Versatility | Ideal for refurbishments, new builds, and heritage buildings.
Solution for roofs with long rafter lengths. |
| Vapor Management | Corrugated profile creates natural ventilation to prevent timber rot |
| Compliance | Full BBA Certification and Bre tested for total peace of mind |
| Recycled Content | Made from 47% recycled cellulose fibres |
| Guaranteed | 30-Year Waterproofing Guarantee |
The Professional Guarantee: Choose a guaranteed system that ensures a watertight structure, and keeps protecting for decades to come.
We want to help you optimise your upcoming low-pitch or refurbishment projects.
- Download the project pack
- Request a CPD
- Browse the Online installation videos and guides
- Browse our ISOLINE LOW LINE project bank for real life case studies
Find out more about ISOLINE LOW LINE
Get in touch. Our team of experts are available to assist you, email: enquiries(Replace this parenthesis with the @ sign)onduline.net or call us on 0207 727 0533.