Acceptable Moisture Levels In Carpet. The rule of thumb is that moisture levels that exceed 20 are when you have a problem. These meters which measure moisture content mc accurately test surfaces and areas for moisture which may make the material being tested susceptible to fungal growth and spread. For example in wood surfaces with mc readings above 20 mold spores can develop.
Moisture meter showing high moisture content in gypsum board behind tile. Floor covering manufacturers whether producers of tile wood carpet or high performance floor coatings publish the maximum allowable moisture content of the concrete over which their flooring products can be installed based on results of various astm.
The two most commonly accepted moisture test methods are insitu percent relative humidity rh astm f.
Checking for moisture below carpet using a moisture meter during a home inspection. A reading of 14 wouldn t necessarily throw up a red flag and is most likely the result of installing carpet on a slab below grade. 07 the contractor shall provide substrates within moisture and alkalinity levels acceptable for floor covering materials. These meters measure the moisture in many types of building materials.
