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Closed-Cell Spray Foam for Sub-Slab Insulation
The pros and cons of using CCSF under a concrete slab
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Beyond Water Heaters
Water heating is a system, not just an appliance
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Zonal Pressure Diagnostics, Part III
Two methods for ensuring accurate blower-door test readings of zoned areas
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How to Insulate a Short Attic Kneewall
Back in my home-performance contracting days (2004 to 2007), I spent a lot of time in unconditioned attics and crawlspaces. First, I was there to find problems. Then, if the…
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The Ratio Rule for Hybrid Roof Insulation
Ensuring the right combination of R-values above and below a roof deck
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Radon Mitigation
There are passive and active systems for keeping radon gas from poisoning indoor air—here’s what to know to get them right
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Combustion Safety With Gas Water Heaters
Effective removal of exhaust from natural-draft gas water heaters requires a proper vent or a flue
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Building a Vaulted High-Performance and Foam-Free Roof Assembly
Josh Salinger shows us how to create more space and vent a roof, and do it all with a reduced environmental footprint.
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How To Get a Double-Stud Wall Right
Five principles to ensure the success of this cold-climate high-performance wall assembly
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How to Manage Indoor Air Quality
Source control, ventilation, dehumidification, and filtration are key to regulating air pollutants such as formaldehyde in our homes
