John Krigger is the coauthor of The Homeowner’s Handbook to Energy Efficiency and a teacher at the Web-based training institute Saturn Online.


Superinsulating My Old House
Aging office worker tackles challenging superinsulated retrofit and lives to tell about it. [continue reading]

Superinsulating My Old House, Phase 2
Phase 1 was an R-35 face-lift of the west façade. Phase 2 looks to the north and east. [continue reading]

Unusual Wood-Burning Insert Installation
Energy expert continues to learn from a deep energy retrofit of his Montana Home. This time he's installing a wood-burning stove to save money, add ambiance, and provide security during emergencies - like when runaway trains knock out a town's power. [continue reading]

Sealing Up Your Home's Leaks
Your house's walls and windows-what building professionals call the building envelope or shell-are supposed to prevent air from moving through them. [continue reading]

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Insulating Closed Roof Cavities
John Krigger
Many homes with cathedral ceilings or flat roofs have little or no insulation. The IRC 2009 building code requires a ventilated space of at least one inch above the roof insulation. Building scientists sometimes ask how useful the ventilation is and how much ventilation could actually flow in the one-inch space. [continue reading]

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