Moisture Meters are readily available for purchase, and relatively easy to use. You can easily check for water intrusion anywhere in your home
You can check framing members and sheathing in the attic if you suspect a roof leak. Or you can check drywall or flooring around windows, bathtubs, showers, toilets, and other areas where you’re concerned that moisture might be an issue.
These quick and easy checks with a moisture meter might detect a small problem before it becomes a major, costly headache.
For home use, General Tools makes an easy to use penetrating meter with a digital readout that’s pretty accurate for around $30. Ryobi has recently introduced a nonpenetrating (pinless) meter aimed at the Do-it-yourself market for about $50. Both of these meters are available at home centers, tool retailers and online sources.
For true professionals one of the most trusted names is Delmhorst.[ www.delmhorst.com] You’ll pay about $150 for one of those, but it might be worth the step up in accuracy and quality.