Blistering and delamination
Moisture vapor pressure under a coating can lift or blister it. Vapor control helps reduce that risk.
Flooring & Coating Systems
Moisture Vapor Control Coatings for Concrete Slabs
Moisture vapor control is a critical consideration when choosing flooring for commercial and industrial facilities. Pacific Coast Contracting installs moisture vapor control systems that help protect floor coatings and finishes from moisture-related failures.
Why slab moisture matters
Concrete needs the right amount of water when it is poured, but excessive moisture afterward can cause delamination, blistering, efflorescence and other problems with the flooring installed on top. Moisture can come from the ground below or from the concrete itself, especially in newer slabs that have not fully dried.
When moisture is present, choosing the correct system is how failures are prevented. A moisture vapor control coating is applied to the prepared slab before the finish floor system to help manage vapor moving up through the concrete.
Testing comes first
Concrete moisture should be measured before a system is selected. Common test methods include in-situ relative humidity probes (ASTM F2170) and calcium chloride tests (ASTM F1869). Results are compared with the limits set by the flooring manufacturer.
Facility Problems
Problems Moisture Vapor Control Coatings Can Help Address
Results depend on the system selected, surface preparation, exposure and maintenance.
New slabs on a tight schedule
Newer concrete often holds more moisture than the finish floor allows. A vapor control system can be part of the solution.
Slabs without an effective vapor retarder
Moisture can move up from the ground into slabs that lack an effective barrier below.
Selection considerations
- Test in several locations. Moisture levels can vary across a slab.
- Know the limits. Each vapor control product and each finish floor has manufacturer moisture limits. The system has to be rated for the conditions measured.
- Preparation. Vapor control coatings need a clean, sound, properly profiled slab to bond.
- It is one part of the floor. Vapor control works together with the finish system above it, such as epoxy, urethane or resilient flooring.
How PCC approaches moisture vapor control projects
Pacific Coast Contracting provides turn-key service for moisture vapor control projects, starting with a review of how the area is used and the condition of the existing surface, then recommending a system and scope.
PCC's turn-key process: consultation and site assessment, testing, project management, tear-out and disposal, surface preparation and installation, followed by final clean-up under PCC's 0 Punch List Program. About PCC.
Industries
Industries That Use Moisture Vapor Control
Pharmaceutical Facilities
Seamless epoxy and urethane floors with integral cove base for manufacturing plants, compounding labs, clinics and pharmacies.
Pharmaceutical flooringHealthcare Facilities
Seamless floors with cove base and anti-microbial additives, plus wall and ceiling coatings for hospitals and clinics.
Healthcare flooringFood and Beverage Facilities
Seamless, impervious floors with anti-slip finishes and slope to drains for food and beverage plants.
Food & Beverage flooringIndustrial and Manufacturing Facilities
Durable, slip-resistant floors for production areas, plus kitchens, locker rooms, mechanical rooms and more.
Industrial & Manufacturing flooringEducational Facilities
Floors for school kitchens, cafeterias, locker rooms, showers, restrooms and computer labs.
Education flooringGovernment Facilities
Floor, wall and ceiling coating installation for government facilities.
Government flooring
Common Questions
Moisture Vapor Control FAQ
How do I know if my concrete slab needs moisture vapor control?
The slab should be tested. In-situ relative humidity testing and calcium chloride testing are common methods, and the results are compared with the limits of the flooring being installed. If moisture is above those limits, a moisture vapor control system may be recommended. Pacific Coast Contracting includes testing in its consultation process.
What causes floor coatings to blister or delaminate?
Common causes include moisture and vapor pressure coming up through the concrete, poor surface preparation, contamination on the slab, and a system that does not match the conditions. Moisture can come from the ground below or from the concrete itself. Testing and proper preparation help Pacific Coast Contracting reduce these risks.
Can flooring be installed on new concrete?
New concrete often contains more moisture than finish flooring can tolerate. Some projects wait for the slab to dry, while others use a moisture vapor control system so work can continue. The right approach depends on test results and the flooring manufacturer's requirements. Pacific Coast Contracting can test the slab and recommend options.
Ready to get started?
Request a Quote for Moisture Vapor Control Coatings
Tell us about your facility, the area involved and your schedule. Pacific Coast Contracting provides consultation, testing and free quotes for commercial and industrial flooring and coating projects.