Construction Materials Online (CMO) was created as the smart way to buy building materials online. Building contractors, architects and specifiers find it an easy way to research and order specialist products and brands. They like being able to purchase 24/7, without travelling to a merchant. Flagship store, Roofing Superstore was first to market 10 years ago. Today it’s the UK’s largest online roofing merchant. Drainage Superstore and Insulation Superstore followed its success. CMO has over 50,000 products listed on its sites. Our customer service teams give technical support and are proud of consistently high-ranking reviews. With over 70 staff at purpose-built premises in Devon, CMO is a growing employer which celebrates innovation.