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Attenu8®: A new standard in Blue Roof performance
As rainfall intensifies and planning demands grow, today’s buildings need smarter, compliant solutions. Proteus Attenu8® is a fully integrated attenuated blue roof waterproofing system that meets the toughest regulatory, thermal and SuDS requirements – all in one coordinated package.
A one-stop shop for blue roof design and delivery
Specify Attenu8® and you benefit from a complete solution - from first enquiry to final installation. A cradle to grave service which covers a wide range of different waterproofing applications including Green Roofs and Inverted Felt Roofs. We also offer a choice of membranes including Pro-BW® Plus waterproofing, Proteus Cold Melt®and Proteus Hot Melt. Attenu8® further includes:
• Total system design, bespoke to each project-specific requirement.
• Dedicated technical support from our in-house specialist team.
• Installation exclusively via approved contractors.
• End-to-end service from early-stage planning to final commissioning and beyond.
• A single point of specification and insured design responsibility.
• Comprehensive insurance-backed guarantees covering every system component.
What makes Attenu8® different?
At the heart of the Attenu8® system lies the ACO Technologies patented drainage and overflow layer that separates water attenuation from the underlying roof drainage. This unique structure allows the drainage system to be independently engineered in line with BS EN12056:3 2000, unlike many competitor systems that obscure or override essential hydraulic principles.
This matters. Precise compliance with BS EN12056:3 enables engineers to accurately calculate flow rates under worst-case rainfall events, protecting clients from design errors, contractual disputes and regulatory non-compliance.
Cold Melt Blue Roof Build Up
Technical advantages at a glance
• Fully compliant with BS EN12056:3 and BS6229:2018.
• Eliminates negative thermal performance in inverted roof designs.
• Reduces required inverted insulation thickness, saving build height and cost.
• Mitigates flotation risk without extra ballast, supporting lighter structural designs.
• Compatible with substrates laid to falls (meeting NHBC and LABC preferences).
• Ideal for new builds and refurbishments on existing falls-based structures.
• Provides secondary waterproofing membrane for high-risk buildings.
• Integrated overflow mechanism to meet 100-year rainfall events.
• Full support for green roofs and bio-solar integration.
• Re-usable, in line with circular economy principles in the London Plan.
• Effective silt and debris management.
• Easy to inspect and maintain in accordance with GRO and CIRIA C817.
• Contributes to BREEAM when used with rainwater harvesting.
• Reduces or eliminates need for below-ground attenuation tanks
Optimised for performance and circularity
The Attenu8® system is not just designed for compliance - it’s built for resilience. Its hybrid approach ensures thermal and hydraulic calculations are aligned, allowing for reduced design depths without compromising performance. It is also ideally suited to circular building practices, offering:
• Reduced drain-down times that match hydraulic calculations.
• All-year-round installation capability.
• Full reusability and compatibility with circular building goals.
• BBA certified to last for the life of the building, once covered, on which it is installed.
Hot Melt Blue Roof Build Up
The total integrated specification
The Attenu8® solution is more than just a blue roof - it's a fully integrated system covering:
• Waterproofing
• Thermal insulation
• Water attenuation
• Drainage
• Green or solar roof compatibility
• Compliance with planning, SuDS, and fire regulations
This joined-up approach reduces design risk, ensures consistent performance and removes the duplication and rework that often results from multi-supplier installations. By choosing Attenu8®, architects and specifiers gain certainty in performance and delivery, reducing pressure on the design team and supporting a "right first time" approach.
Guaranteed peace of mind
All Attenu8® systems are:
• Installed only by approved Proteus contractors.
• Covered by a single, insurance-backed warranty.
• Backed by the combined expertise of Proteus Waterproofing and ACO Technologies.
• Supported by full technical documentation and installation guidance.
Pro BW Roof Build Up
Applications across all sectors
Attenu8® is ideal for a wide range of different application including:
• Commercial buildings
• Residential and mixed-use schemes
• Data centres and critical infrastructure
• Education facilities
• Healthcare environments
• Ministry of Defence and government buildings
• Retrofit projects requiring SuDS compliance
Also include refurbishment properties with existing roofs with falls
Wherever water needs to be controlled, Attenu8® delivers precision, reliability, and compliance.
Start Your Project with Confidence
Whether you are in the early planning stages or developing detailed specifications, our team is here to help. We work with architects, specifiers and contractors to simplify the process - from technical advice and system design through to installation and post-completion support. To discuss your project or request a technical consultation, contact our expert team or download our Attenu8® specification guide.
