Following the launch of its home insulation service, Tesco is expanding into windows and doors. A range of casement windows and residential doors - all with double Clubcard points - is being added to the retailer's Home Efficiency Service with the aim of bringing a convenient, reliable and competitively-priced offer to customers. Andrew Brocklehurst, Category Manager of Tesco Greener Living, said: "We aim to offer a full range of home efficiency services that will make our customers' lives greener and easier. Our customers have told us that they want to "go green" and save money: the right windows and doors can significantly cut heat loss and make a big contribution to cutting energy bills." This new venture enhances Tesco's existing range of services such as loft insulation and solar panels.