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R-value
R-value measures how well insulation resists heat moving through it. Higher is better.
Why it matters
R-value helps compare insulation choices and plan for comfort.
Where people get this wrong
High R-value does not stop air leaks. Install quality matters. Gaps and compression reduce performance.
Real-world example
You buy a thick winter coat, but cold air still sneaks in through an open collar. R-value is the coat thickness. Air sealing is the collar closed.
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.
Most people do not just struggle with terms. They struggle with the decisions tied to them.
See how HouseChalk helps with the decisions behind terms like this