![]() ![]() Moisture meters are either pin-type, pinless, or a combination of the two. Drywall Moisture Metersįor accurate moisture content readings, you’ll need a moisture detector. Not all moisture meters give accurate readings all the time on all materials. If you see visible signs of water damage, you need to investigate. Crumbling drywall is also an indication that your drywall has prolonged exposure to moisture, and there is likely a larger problem at play even if your moisture meter is giving you a low reading. If a wall is soft, smells mildewy or damp, or has visible water stains or cracks, you can be pretty sure that it has been damaged and needs to be replaced. Sometimes, if you’re looking for a major problem, you don’t need to do anything more than a visual inspection. This allows you to account for humidity in the air. Often it is to use a relative scale to take moisture readings. It’s more useful when determining if there is a problem. A garage during a Florida summer might read near 12% and be ok, but a climate-controlled home in a drier area might be in trouble at that level. Still, drywall installed and has faced the elements, whether climate-controlled or not, will reflect the area’s relative humidity. Ideally, the moisture content of drywall would be less than 1%. Relative humidity levels surrounding the drywall will affect readings, as will the type of moisture meter you use. Anything higher than this indicates that the drywall has been moisture-compromised and is susceptible to crumbling and deterioration, though drywall that has not reached above 17% may still be salvageable. ![]() Moisture content in drywall is acceptable up to 12%, and it’s not uncommon to find installed drywall reading between 5% and 12%. The Optimal Moisture Content for Drywall. ![]()
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