Image Source: Madeleine.McEwan for Feilden Clegg Bradley Studios

The challenge

Planning constraints on a new, larger lecture theatre for the University of Bristol meant that a new and innovative approach was needed to provide a cost effective solution. Planning stipulations were that there should be no increase in the amount of excess water that was discharged into the existing drain infrastructure.

The solution

Alumasc’s pioneering BluRoof waterproofing system was used, making this the first ever BluRoof installation in the UK. Alumasc’s BluRoof is a new concept in water management, offering the combined expertise of Alumasc Roofing Systems and Harmer Engineered Drainage Systems in order to manage the rate of water discharge from the roof. As part of the project, 400m2 of the innovative BluRoof system was installed, along with a Blackdown fully bio-diverse Green Roof system also from Alumasc.

The combination of Alumasc’s BluRoof and Blackdown Green Roof systems meant that the retention of storm water in the green roof’s build-up – i.e. the plants, substrate and drainage/reservoir layer – complemented the detention of storm water by the BluRoof, thus releasing valuable additional downstream drainage capacity and avoiding the need for additional attenuation tanks in Bristol City Centre.

From Rain to Drain

Alumasc businesses work together to provide a comprehensive water management solution within the built environment.

Our ‘Rain to Drain’ concept illustrates how our systems manage water originating both outside and within a building, through to its discharge into water courses, sewers or the ground.


Alumasc Rain to Drain