William Cooper Limited are Britain’s leading developers and installers of flat to pitch roof conversion systems. The Company was established in 1973 and became Limited in 1991. During 2007, William Cooper Limited was purchased by William Cooper Holdings Ltd as part of the management buy-out by the directors. William Cooper Limited operates throughout the UK and it’s head office is based in Barnsley South Yorkshire, which is a purpose built manufacturing and office facility and there are also offices in Luton, Bedfordshire. The directors and management at William Cooper Limited has a proven track record of over 45 years providing roof solutions. William Cooper Limited were co-developers of the Capella Roofing system and were the first Company in the UK to be awarded an ISO in flat to pitch roof conversions. The Capella Roofing System is a clear span truss, which is a tried, tested and proven solution to achieving clear span options up to 30 metres where no direct loading is acceptable on the existing flat roof. This system utilises the Ward multibeam purlin and channel sections, which are factory precision punched and bolted on site for a quick and simple assembly. William Cooper Limited has a solution for all roofs. As well as the Capella system, William Cooper Limited are improved installers of many other flat to pitch roof systems including Ash Jack, FTP and Dibsa. If a flat to pitch roof is not required, we offer permaquick hot melt solution, single ply systems and Kalzip roofs to name a few. But there’s more, William Cooper Limited do not stop at roof solutions as they have worked closely and in conjunction with Kingspan (formerly known as Ward Building Components) in developing engineered construction systems and we undertake the full design and build package from initial survey, design options, cad drawings, building control and planning approval through to full site management and installation.