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Dew point
Dew point is the temperature where air turns its moisture into liquid water on a surface.
Why it matters
It explains why moisture can appear inside walls even without a leak.
Where people get this wrong
Condensation is not always a roof leak.
Real-world example
A cold drink sweats on a hot day. If a part of your wall becomes the cold drink, moisture can form where you cannot see it.
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