The building envelope also called the “shell” includes everything that separates your home from the outside. Key components of the building envelope include walls, ceiling, doors, and windows. The building envelope is responsible for a large portion of the home’s temperature and moisture control. When our team at The Hayes Company evaluates your home envelope, we look to see if the proper temperature and moisture barriers are present and doing their job, as well as if they can be improved to increase the energy efficiency and overall comfort of your home.