Vapor Barrier & Moisture Mitigation System
To begin with, the cost of moisture-related flooring issues or the absence of a vapor barrier should be disincentive enough to send any flooring professional searching for solutions.
It’s expected that every year approximately $1 billion are spent on floor-related failures due to moisture in the subfloor.
Prevention from Moisture-Related Flooring Issues
Firstly, the most effective preventative measure for moisture-connected flooring issues is time. Time for the concrete slab to dry sufficiently. Time is needed to admit moisture levels to reach specified tolerances of used materials.
Moreover, a typical indication of high moisture levels obstructing with installed coatings may include:
blistering and bubbles
delamination or coating failure
discoloration and crazing
efflorescence and warping
Moisture Control Options
As a matter of fact, Moisture Control Systems – is flooring insurance as it reduces the risks of moisture-related issues when vapor barrier application’s cost upfront can compensate potential disasters during epoxy coatings application.
In fact, the purpose of any moisture mitigation system is to eliminate water vapor movement into the coating system. This includes water vapor from groundwater, moisture vapor from an insufficiently dry concrete slab, such as off-gassing. Regardless of the source, high moisture will migrate from high concentration areas to low concentration areas until it reaches a state of equilibrium. Interfering that natural process is the key to preventing moisture issues.
Vapor Barrier – Applied Membranes
This includes epoxy or polyurethane primers. Furthermore, Moisture control membranes are applied on a concrete slab to reduce the permeability between concrete and final coating applications. There are also cementitious layers or acrylic latex resins that create this non-permeable shield layer to prevent moisture migration.
In this case, recommended the coating manufacturer specifies vapor barrier products to ensure proper installation and performance. Also, Ardex and Schonox deliver one and two-coat moisture control systems to address problematic moisture vapor emissions in concrete.
Lastly, it’s imperative to measure accurate moisture Relative Humidity (RH) levels in the concrete slab before the coating application project.
Above all, for concrete slab, moisture testing provides the best indicator of the slab’s RH level, showing when the subfloor is ready for coating installation. It can also help in determining the proper coating product selection for the project. Thus, everything from the concrete mix to the project environment contributes to the RH levels in the concrete slab, and only RH testing can provide reliable measures.