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To characterize outside air distribution in residential buildings, this paper develops a practical methodology adapted from ASHRAE Standard 129. The methodology includes the examination of multi… Read More

Unvented cathedralized attic (UCA) assemblies, created by eliminating ventilation and by moving the thermal insulation and air barrier from the ceiling plane to the rafters,… Read More

One of the most iconic images that shaped my career in the early days was from Madelene Rousseau’s presentation at “”Building Science Insight: ’83”…Humidity, Condensation and Ventilation in Houses…… Read More

To vent, or not to vent…that is the question: Whether ‘tis nobler in the mind to suffer  The slings and arrows of outrageous moisture, Or to take arms against them And by opposing end them.… Read More

At the most basic level a building is an environmental separator – it keeps the outside out and the inside in.  Why?  Well, sometimes the outside sucks and we want to keep it from getting… Read More

Imagine a world where the building code does not allow returns to be installed in closets to control mold and other contaminants. That would be insane right? Welcome to the real world. Let me make… Read More

Five Integrated Pest Management Strategies to Consider Pests include insects and animals that have a harmful effect on humans, food or living conditions.  Pests include insects, termites,… Read More

Sometimes obvious things are not so obvious.  And when you miss them, they can be expensive….and embarrassing.  And often the embarrassing is worse than the expense….”that was… Read More

Wall assembly design and construction needs to consider rain, temperature, humidity as defined by the hygro-thermal regions, annual rainfall and the interior climate classes as environmental loads… Read More

Yes, we have done unvented conditioned attics before….but mostly with spray foam and rigid foam insulations.  But we do not have to use spray foam and rigid foam insulations.  You… Read More