Add as a preferred source on Google

Concrete Slab Configuration Raises Concerns Among Sports Flooring Installers

  • 01/23/18

OAKBROOK TERRACE, IL – Concrete slab configuration is very important in the success of a new maple floor installation.  Placing a below-slab vapor barrier directly beneath the concrete slab is proper and typical.  Placing any type of fill material between the below-slab vapor barrier and the concrete slab frequently causes moisture-related problems with the finished maple surface.

The Maple Flooring Manufacturers Association (MFMA) requires the general contractor to provide a concrete slab troweled smooth and flat to a tolerance of 1/8 of an inch in a 10-foot radius, subject to the approval of the MFMA wood flooring contractor. By placing sand between the vapor barrier and the slab, a flatter concrete slab with less initial curling can be produced.  However, this configuration allows the sand to act like a sponge—trapping moisture within the sand layer during the concrete pour. Over time, trapped moisture can migrate up through the concrete slab and cause moisture-related difficulties with subfloor components and the finished wood flooring surface.

The only MFMA-recognized method for reading concrete moisture levels within a slab is by testing its relative humidity. Please refer to the instructions of the manufacturer’s relative humidity test kit for complete details on how to administer the test correctly. MFMA recommends the relative humidity level for a concrete slab for a non-glue-down maple floor system be 85 percent or lower and for glue down systems the concrete slab relative humidity level should be 75 percent or lower before installation.For concrete relative humidity conditions above MFMA’s recommendation consult your MFMA Sport Floor Contractor or your MFMA Manufacturer.

For more information regarding variations to MFMA’s recommended concrete slab configuration, please contact MFMA’s technical director at 888/480-9138 or email [email protected].

Featured

  • Longwood University Selects Builder for $73M Performing Arts Center

    Longwood University in Farmville, Va., recently announced that it has selected Swedish construction company Skanska as the builder of its new performing arts center, according to online news. The project involves the demolition of the current building and constructing a new, 64,500-square-foot facility.

  • Elevating Campus Maintenance: How Power Wash Drones are Transforming Educational Facilities

    As today’s campuses grow larger and more architecturally complex, keeping exteriors clean, safe, and inviting has never been tougher. Facilities leaders are under constant pressure to stretch budgets, meet safety standards, and support sustainability goals—all while tackling the stubborn challenge of exterior cleaning.

  • Uvalde Schools Receive AI Security Technology through Grant Program

    AI-powered gun detection and emergency response technology solutions provider Omnilert recently launched the Save Haven Grant program, according to a news release. The first recipient of the grant, aimed specifically at schools that have faced gun violence, will be the Uvalde Consolidated Independent School District (Uvalde CISD) in Uvalde, Texas.

  • Tennessee State University Gains Approval for New Engineering Facility

    Tennessee State University in Nashville, Tenn., recently announced that it has received approval from the Tennessee State Building Commission to build a new engineering building on campus, according to a university news release. The 70,000-square-foot, $50-million facility will play home to the university’s engineering programs and the Applied & Industrial Technology program.

Digital Edition