About HumidityInHouse

HumidityInHouse exists because most advice about damp homes stops at the point where it gets useful. Sites will tell you that 30–50% is the ideal range and that you should ventilate. They will not tell you how much water a bowl of rock salt actually removes, or why your mold keeps returning to the same corner after you bought a dehumidifier, or that opening a window in August makes things worse.

This site is built around one idea: measure first, identify the cause, then apply the fix that matches that cause — ranked by what it costs you.

How we decide what to publish

Every recommendation on this site has to survive three questions. What does it actually remove or change, in numbers a reader can check? When does it fail? And is there something cheaper that does the same job?

That last question is why the free fixes come first on every page. Moving a wardrobe two inches off an exterior wall solves more mold problems than any appliance, and it costs nothing.

What we do not do

We do not sell dehumidifiers, damp proofing or remediation services, and we do not take commissions on products. The site is supported by advertising, which means the guidance does not change based on what you might buy.

We also do not diagnose your house from a distance. Structural damp, extensive mold and anything involving contaminated water need someone on site. Where that line is, we say so.

Units and spelling

Written for US readers: Fahrenheit, pints per day, square feet, and "mold". Every calculator has a metric toggle, because the physics does not care which units you prefer.