Definition of Dew Point: Why moisture condenses out of air. The dew point and relative humidity are the two most-widely used ways that people describe the amount of moisture that is in air. includes dew point calculations, formulas, and mathematic models later in this article.įirst let's understand what the dew point is. How to Predict or Calculate a Wall Cavity Dew Point or Condensation Point in Buildings Is there a formula which will determine the dew point inside a building wall when both inside and outside relative humilities and temperatures are known? - J.L.B., G4reenfield Center, NY. But the literature does not provide any clues as to how to predict wall cavity condensation. Our page top photo shows severe moisture condensation on a basement window and window frame.Īll of the literature I have read on condensation within building wall cavities warns of the problem of cavity moisture (a potential source of mold contamination, insect attack, or structural rot). Accompanying text is reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss. The question-and-answer article about calculating the dew point in walls and a discussion of mathematical models of moisture condensation, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss. How to Calculate or Predict the Dew Point in a Building Wall or Ceiling Cavity Question about how we calculate the dew point in buildings We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article explains how the wall cavity dew point, the point at which moisture condenses out of air onto a surface, is calculated for a building cavity such as inside of an insulated wall. We have no relationship with advertisers, products, or services discussed at this website.ĭew point: Definition of dew point & relative humidity how to calculate the dew point. InspectAPedia tolerates no conflicts of interest.
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