With more than 20 years' experience in energy efficiency and sustainability, Karen cuts through the jargon to explain environmental impacts and help you find greener options. Insulating a pitched roof ...

Lee Wallender is a home improvement writer of nearly 20 years and specializes in home remodeling, repair and maintenance. Installing insulation in walls is one of the most efficient and cost-effective ...

Robert Marchand has received funding from the Engineering and Physical Research Council and the Economic and Social Research Council. He has also completed energy efficiency programme evaluations for ...