01473 257671Contact usMembers Area
University roof with BauderGREEN and solar panels installed

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). 

Blue roof where stormwater is attenuated below a substrate and vegetation finish on the roof

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

Six steps is all it takes

1

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. 

Brief and consultation
2

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. 

Blue roof proposal
3

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. 

Specifications, calculations and detail design
4

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. 

Contractor selection
5

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.

Installation of the blue roof solution
6

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). 

Sign off and guarantee

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.

ArchitectsWorking.jpg

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.