Q: When you're doing a blower-door test, does it matter whether you're pushing air in or pulling it out? In other words, is the air infiltration rate the same at -50 pascals as it is at +50 pascals? And if so, when would you use one approach and when the
Q: Builders in cold climates often go beyond code-required attic insulation levels, especially when using a relatively inexpensive material like blown-in cellulose. Is the same approach helpful in cooling climates?