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Sustainable Repositioning at The Acre, Covent Garden
The Acre, formerly 90 Long Acre, is a landmark 240,000 sq ft office redevelopment in Covent Garden. Through a “Cut & Carve” approach, over 80% of the original structure was retained, halving the embodied carbon compared to a new-build. The project targets net zero carbon in operation, achieving BREEAM Outstanding and WELL Platinum.
The roof was critical to these ambitious goals, requiring a high-performance waterproofing strategy. BMI Icopal worked in conjunction with MAC Roofing and Contracting Ltd to complete the 7000 m2 roofscape.
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A Look into the Project:
The roof was critical to these ambitious goals, requiring a high-performance waterproofing strategy. BMI Icopal worked in conjunction with MAC Roofing and Contracting Ltd to complete the 7000 m2 roofscape.
MAC used a multi-system approach: Parabit Solo Hotmelt and Sealoflex Ultima Premium were the primary systems, used in conjunction with a Sky Garden green roof and a blue roof rainwater attenuation system.
The roof features:
- Green Roofs with London Wildflower mix to boost biodiversity and a PV Wildflower mix to cool solar panels and increase efficiency.
- A Blue Roof on Level 9 that stores rainwater using gravity for controlled, energy-free discharge, protecting the Parabit hot melt membrane from continuous hydrostatic pressure.
The complex integration of these systems on an existing structure required meticulous planning to balance weight, thermal performance, and wind uplift. MAC’s team successfully executed complex detailing around over 100 penetrations on the blue roof area and created a fullscale sample rig to guarantee the quality of the intricate work.
The refurbished building has welcomed the BSI as a new tenant to the top two floors
Why you Should Join the IMA
Why you Should Join the IMA
Founded in 1996 by Icopal as a non-profit organisation, the IMA champions the highest quality standards in flat roof waterproofing across the UK. The association offers a range of technically advanced, high-performance roofing products backed by industry-leading guarantees, applied exclusively through a network of approved IMA contractors.
Scroll through below to explore some IMA projects
John Lewis - Kingston Upon Thames with Noxite
