HouseChalk
Blown insulation
Blown insulation is loose-fill insulation that is blown into attics, walls, or floors using a machine.
Why it matters
It can fill odd-shaped spaces and cover large areas quickly. It works well in attics and can be added to existing walls in some cases.
Where people get this wrong
Blown insulation can settle over time. Depth markers help you verify installed thickness. In walls, dense-pack installation is important to prevent settling.
Real-world example
An insulation crew blows fluffy cellulose into an attic. The attic ruler shows 14 inches. That depth gives the R-value the home needs for the climate zone.
Where this hits your build
This affects comfort, energy costs, and indoor air quality. It gets locked behind drywall, so decisions here need to be right before finishing starts.
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