IAQ.net Resources

EPA Moisture Control Guide 2013

Issue link: https://hi.iaq.net/i/248503

Contents of this Issue


Page 120 of 144

www.epa.gov/iaq/moisture quantitative test that provides a measure of the vapor, in pounds of water in a 1,000 square foot area, emitted over a 24-hour period. The test involves weighing a canister of calcium chloride desiccant, placing the canister on the slab to be tested, and covering the canister with an airtight plastic dome supplied with the kit. The test typically is conducted for 60 to 72 hours. After that time, the canister is reweighed and the vapor emission rate is calculated. This test method is accepted by most floor covering manufacturers. manufacturer's warranty. It is recommended that the vapor emission rate of a floor be measured before coverings are installed (even when the installation occurs long after the building was constructed); whenever lifting tiles, blistered sheet vinyl, or other signs of floor failure are found; or when unexplained high indoor relative humidity in ground-contact spaces is encountered. ASTM E 1907-06a Standard Guide to Methods of Evaluating Moisture Conditions of Concrete Floors to Receive Resilient Floor Coverings identifies eight methods of testing concrete slabs. The two most commonly used methods are: • F 2170 Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes. This method measures the head space relative humidity in a hole drilled partway through the concrete slab. It is gaining popularity in the field and has been used in Europe for many years. • F 1869 Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride. This test is conducted using commercially available test kits. It is a C-2

Articles in this issue

Links on this page

Archives of this issue

view archives of IAQ.net Resources - EPA Moisture Control Guide 2013