Bringing an old house up to date energy-wise can improve comfort and energy performance.
Adding insulation over the walls and roof makes a continuous thermal barrier while burning your thermal bridges.
It includes replacing the siding and roofing and detailing the windows.
Wrapping a house in foam can also cause headaches if not done thoughtfully: make sure that the air, water, and thermal barriers are working together, not against each other.
Trapping moisture in a tight house means #BugsMoldRot
Animated drawings show what to do in a perfect world
- Roof and Wall Retrofit (Vented Roof)
- Roof and Wall Retrofit (Unvented Roof)
- Roof Retrofit (Vented Roof)
- Roof Retrofit (Unvented Roof)
Action videos show how to do it in the real world
Compliance made easy
- 2012 IECC: R402 BUILDING THERMAL ENVELOPE
- 2012 IRC: R806 ROOF VENTILATION
- 2012 IRC: R906 ROOF INSULATION
Extra Credit Homework
Dive deep, but don't forget to come up for air
- Building America Solutions Center:
Guide to Cold and Very Cold Climates
- Building Science Corporation:
Building Enclosures that Work in Cold and Very Cold Climates
*This collection of technical drawings and animations, how-to videos, articles, photos, downloads, and links may not be a complete encyclopedia on the topic, but it is a heck of a great place to begin. If you have anything to add, post it in the comment section. We'll update the page.