The preservation of old buildings goes hand-in-hand with current thinking on green issues because it not only ensures that our historic environment is secured, but it also prolongs the life of the energy embodied in their construction. With careful upgrading of thermal insulation and draught proofing, historic buildings can be warm and dry and not cost a fortune to heat. Where possible, we will specify natural materials such as sheep’s wool insulation, which is truly sustainable and can be locally sourced.