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 dresser 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.
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.
How the site is organized
There are six ways into the same material, because people arrive holding different things. If you can see something — a black patch, a wet window, a musty smell — start in problems, which works backwards from the symptom to the cause. If you know the cause and want the fix, solutions is grouped by mechanism rather than by product, ranked by what it costs you.
If the trouble is confined to one space, rooms covers what each one does across a year and where in it to put a hygrometer — a basement and a bathroom need opposite treatment and the same advice ruins one of them. If the disagreement is with advice written for a different part of the country, climate and the Texas city guides attach a location to every rule.
If you have a number and want to know what it licenses you to do, the calculators turn a hygrometer reading into a dew point, a mold risk at a cold surface, a dehumidifier size or a decision about a window. And if you want the underlying reference — the target chart, the measurement method, the vocabulary — that is guides.
Every page carries the same three commitments: a short answer at the top for people who do not want to read the rest, a section on when the advice does not work, and sources for anything that rests on published standards rather than on our own measurement.
What gets written next
Coverage follows two things: what readers ask for, and where the existing material is thinnest against a question people actually have. City-level guidance is the current gap being filled, because the right answer for a house genuinely changes between the Gulf Coast and the Panhandle and almost nothing published nationally acknowledges that.
If there is a room, a climate, a city or a method that is missing, the contact page is the fastest way to influence what appears here.
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.