Blue Roofs
Rooftop sustainable urban drainage solutions (SuDS), designed to attenuate and slow the discharge of stormwater on a flat roof via a restrictive flow outlet.
Specifying a blue roof system
A BauderBLUE roof controls rainwater where it lands, one of the core pillars of SuDS design. It can be constructed at either rooftop or podium level with a variety of landscape finishes including green roofs, biosolar PV array, or hard landscaping.
A blue roof is usually required to meet planning when restrictions have been placed on the construction to limit the flow rate of rainwater leaving a site via the drainage system.
The blue roof outlet restricts the discharge of stormwater to a calculated and defined flow rate to significantly slow down the volume of water leaving the site. As the storm passes, water continues to discharge from the roof at a controlled rate over a set period (typically up to 48 hrs).
Outline of BauderBLUE roof solutions
- Three different systems with stormwater flow restrictor outlet
- Our specification service will confirm suitability of waterproofing system for each roof area
- Warm, cold, and inverted roof design options
- Single point guarantee to comply with client's insurance company requirement
Achieving technical objectives
- Bespoke, project specific discharge rates to match drainage requirements for the site
- Precise volume and weight of water storage with overflow to ensure the maximum water level (H-Max) is never exceeded
- Design support to meet relevant British Standards and blue roof guidance criteria
BauderBLUE Roof Systems
There are three different options available to the construction designer to achieve a blue roof depending on the finish desired and the volume of water to be attenuated.
BauderBLUE STORMsub
A blue roof within a green roof where the substrate and water retention board attenuate stormwater.
Discover moreBauderBLUE STORMcell
A blue roof beneath a roof finish for high volumes of stormwater attenuation.
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A simple blue roof solution beneath hard landscaping on a pedestal support system.
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Six steps is all it takes
Brief and consultation
You give us your remit either at your office or on site. We will discuss the blue roof project; building type and usage, level of access required, SuDS requirements, zero falls necessity, weight loadings, performance expectations, preferred system application, your budget and how the programme of works can be formulated.
Blue roof proposal
The design of every blue roof is individual to the geographical location, construction project and the total allowable discharge defined by the LPA within the planning approval. Therefore we consider the different options available to achieve a blue roof depending on the finished desired and the volume of water to be attenuated.
Specifications, calculations and detail design
Designing to protect the building's construction and flat roof waterproofing is vital when delivering a blue roof as many additional forces can affect the structure. We produce roof specific discharge reports for all blue roof specifications we are engaged with, including flow rate, drainage and wind load calculations.
Contractor selection
Your Bauder technical manager will assist in the selection of appropriate contractors who are approved in the installation of Bauder's various blue roof systems. Our national network of contractors undergo a rigorous selection process and their installers are trained specifically in the application of our systems, so you are ensured an expert installation.
Installation of the blue roof solution
Once the Bauder approved contractor has been appointed, a pre-contract meeting will make sure that the project delivery is well coordinated. The works are closely monitored by Bauder site technicians with regular inspections and ‘live’ time reports to ensure quality and waterproof integrity of the roof.
Sign off and guarantee
A full final inspection is completed on the works by our site technician team following rigorous approval criteria before the guarantee is issued. Our comprehensive range of guarantee packages fulfil cover requirements for the project (dependant on system/product selection).
BauderSOLAR PV Solutions
Suitable for flat, green, and blue roof applications, our PV solutions are innovative, penetration-free, quick to install, and provide a cost effective and highly efficient solution.
Why clients choose us
Customers choose us because of the way in which we do business, for our robust advice on the right system, and our approach to delivering projects. We work alongside clients to deliver the best solution for a building from our broad portfolio of systems.
We assist you with the design of the detailing, writing the specification for the flat roof solution, and recommend suitable approved contractors to tender for the project.
The service is without charge, and we work with you to ensure your roof specification meets all your needs and that of the building.
A selection of our blue roofing projects
Cambridge University, Department of Civil Engineering
New build project in the centre of Cambridge combining a blue roof, bio-diverse green roof and solar PV on top the insulation and Bauder Total Green Roof waterproofing system.
- New Build
- East of England
- Education
- Bitumen
- Solar PV, BioSOLAR Green Roof, Biodiverse Green Roof, Blue Roof Water Attenuation
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Additional support
Our ethos is to support you through your project from concept and design to system selection, installation, inspection, sign-off, guarantee and beyond. We don't just supply products to a distributor, we work with you and care about the projects you deliver.
FAQs
If you have a question, please check our FAQ section. We've compiled answers to the most common queries to help you quickly find the information you need.
Find out moreCPDs and e-learning
Bespoke presentations developed to your knowledge requirements, and tailored towards a project you are working on.
Find out moreTechnical Centre
The Bauder online technical centre will support you with a variety of free downloads including BIM objects, NBS specifications, CAD detail drawings, certifications, brochures, maintenance guides and. Log in or register for access today.
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Useful downloads
Contact us today about your blue roof project
Each project is unique in its requirements, and we have lots of resources and examples of our work available to help guide you. If you are looking for a blue roof solution for a new build or refurbishment project, then get in touch with our team to discuss your project’s individual needs.