The new Leeds Arena was a £60m project by Leeds Council to create a striking new stadium, which has been crowned with a 7,500sqm Sika Sarnafil single ply roofing system, installed by experienced contractor Lakesmere. Alongside main contractor BAM Construction and architects Populous, Lakesmere saw the project become its first fully Building Information Modelling (BIM) integrated contract to date, with a collaborative working practice between all teams involved in the project being essential to its successful delivery. By specifying the S327-18EL Copper Patina Sika Sarnafil system along with suitable insulation for the 7,500sq m main auditorium roof, it was ensured that the arena achieved the desired acoustic performance in terms of noise breakout and sound reverberation. Sika Sarnafil S327- 18EL also has outstanding resistance to weathering, including permanent UV radiation and flexibility in cold weathers.