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Open- vs. Closed-Cell Spray Foam
Two spray foam experts explain their preferences
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Open-Cell Foam Beats Closed-Cell Foam
It’s breathable, less expensive, and greener
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Closed-Cell Foam Beats Open-Cell Foam
Higher R-values and lower permeance make closed-cell foam a winner
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How Deep Is Your Footprint?
A simple path to net-zero energy may be moving to the city and giving up the use of private automobiles
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Pro/Con: Does Passivhaus Make Sense Over Here?
Three North American experts weigh in on applying a German energy efficiency standard across our broad climate zones
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Comparing Passivhaus Homes to Other Low-Energy Homes
Some Passivhaus recommendations are impractical and unjustifiably expensive
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In Defense of the Passive House Standard
A point-by-point clarification of why the Passive House Standard sets a worthy goal for North America
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A Great Experience at the West Coast Green Booth
Helping people get what they need is even more rewarding than sitting in my office juggling a budget.
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Pedaling Our Way Through The Day
Bicycle-power is great, but it's better if the battery pack works
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A Walk Through San Francisco
As with many cities, there are only two exterior walls on most of these houses