Alumasc has supplied a pioneering new flat roofing system with unique environmental benefits, as part of the redevelopment of thecentre:mk shopping centre in Milton Keynes.
Derbigum Olivine is an ecological roofing solution, with a naturally-sourced upper mineral layer. During rainfall, the Olivine membrane makes contact with CO2 present in the atmosphere resulting in a chemical reaction taking place which neutralises the CO2. An impressive 1,750kg of CO2 can be neutralised over the lifetime of the roof, providing a positive impact on climate change.
Joint owners of thecentre:mk, Hermes Real Estate Investment Management and Prudential Property Investment Managers, opted to replace the original roof as part of a re-roofing programme that sees the company strategically replacing a number of its vulnerable roofs every year.
Over 1000m2 of the Derbigum Olivine membrane was expertly installed by M &J Flat Roofing, an Alumasc registered contractor. Richard James, Managing Surveyor at M&J Flat Roofing explains:
The existing roofing works at the shopping centre had been waterproofed using a green mineral faced bituminous roofing system. We introduced Alumascs Derbigum Olivine to the Centre Management who approved the installation because they thought the concept of Olivines CO2 neutralising properties was unique and fitted with their carbon neutral stance. The system proved to be more cost effective than the previous roofing system and was simple to install.
The shopping centre scheme did, however, present challenges that the Alumasc Technical Team were able to overcome. Alumascs Southern Region Manager, James Donovan, explains:
Modern roofs are designed with a fall to allow efficient drainage of rainwater, however roofs designed in the 1970s were notorious for poor fall and this was the case on the Milton Keynes scheme. To combat this, Alumasc specified a pitched insulation solution to assist with rainwater run-off, which in turn will help prolong the life expectancy of the roof.
Like all other Derbigum membranes, Olivine is easy to apply, highly durable and 100% recyclable. It can be applied as part of a one or two-layer system and can be cold bonded, hot air welded or torch-applied.