Build a High-Performance Exterior Door
This beautiful door is ideally suited to energy-efficient homes and can be made with common building materials.
Synopsis: Natural builder Ben Graham and custom woodworker Mike Lamp demonstrate how they recently designed and built a 3-1/2-in.-thick R-10 wood door using salvaged cherry lumber. The door’s construction details, product selections, and design choices are explained thoroughly. The second half of the article shows how Graham and Lamp installed the 140-lb. door and integrated it into the home’s building envelope. Exploded drawings show how the door and its two-piece jamb assembly are constructed.
We recently completed a deep-energy retrofit to an 80-year-old Vermont farmhouse. The many improvements we made included new windows, new mechanical systems, and the addition of 4 in. of exterior mineral-wool insulation. Not surprisingly, the project also called for new energy-efficient exterior doors to complement the home’s high-performance building envelope.
For an ultra-efficient house like this one, entry doors are often sourced from Europe, where high-performance doors are more mainstream than in…