Concrete Subfloor Preparation for Laminate and Vinyl. Practical comparisons, current flooring material prices and WhatsApp quote guidance for South African buyers. This guide focuses on the practical choices and costs a South African buyer should consider before committing to a floor.
The substrate is part of the flooring system
Even premium flooring will underperform on a substrate that is damp, loose or outside the allowed flatness tolerance. The installer should assess concrete before the material arrives.
Check moisture using the proper method
Surface appearance is not a reliable moisture test. Follow the specific flooring and underlay manufacturers’ moisture criteria and choose an appropriate method of measurement.
Correct uneven and damaged areas
Fill or level defects with products compatible with the substrate and finish. Loose old adhesive, paint contamination and hollow tiles may need removal or treatment.
Account for floor height
Levelling and the selected flooring increase finished height and can affect doors, stairs, skirtings and adjacent ceramic tiles. Plan transitions before materials are bought.
Choose premium quality by checking the actual board
Ask for an 8 mm laminate sample showing the 240 mm plank width, AC3 or AC4 classification and wax-treated V-groove/click profile. View the real EIR texture on colours where available. Wax-treated joins can help with ordinary spills, but laminate remains water-resistant rather than waterproof. Professional independent installers with 10+ years’ experience may be available by referral; request their separate labour quotation.
Document the substrate rather than assume it is dry
New concrete can appear dry at its surface while retaining moisture internally. Appropriate test methods and manufacturer-specified limits should be checked before laying laminate, SPC or glue-down LVT.
Before confirming any price, get the specific product sheet, measured area, batch availability, accessories, transport estimate and independent fitting requirements in writing.
Questions buyers ask
Can thicker laminate fix an uneven slab?
No. The subfloor must meet the manufacturer’s flatness requirements.
Is a moisture barrier always needed?
That depends on the system, base and manufacturer. An installer should specify the correct approach.
Can FlooringXpress recommend a reliable installer?
Ask our team about independent professional flooring installers, including experienced fitters with 10+ years of installation experience, subject to your area and current availability. Installation labour, site assessment, fitting dates and workmanship terms are agreed directly with the installer; FlooringXpress supplies the flooring materials.