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Testing for moisture before installing resin flooring is a vital step that can prevent surface failures, bubbling, or poor adhesion. Ignoring this simple check can lead to expensive repairs or reinstallation down the line.
Why Is Moisture Testing Important?
New concrete or screeds may look dry on the surface but can retain moisture within. If resin is applied before the substrate is thoroughly dry, trapped water vapour may cause blistering, delamination, or unsightly flaws. Ensuring the base is suitably dry lays the foundation for a seamless, long-lasting floor.


How to Check Moisture in Floors
Use a moisture meter specifically designed for concrete or screed to measure dampness at various spots across the surface. Pay particular attention to areas close to doors, walls, or where water ingress could be an issue. Many professionals recommend following manufacturer guidelines for acceptable moisture levels before applying a primer or resin coat.
- Test at several points for consistent results
- If moisture content is above recommended levels, allow for further drying or use a suitable moisture barrier
- Always record your findings for future reference
Preparation Steps After Testing
Once the base passes the moisture test, proceed with substrate repair and priming. A quality primer such as Epoxyprimer ensures strong adhesion between the substrate and the resin, further protecting against future issues. For outdoor applications or absorbent bases, sealing with a product designed for moisture control like Resinstone may be appropriate.

When This Matters Most
Moisture testing is crucial when working with newly poured concrete or screeds, converting damp basements, or preparing areas previously exposed to moisture. Skipping this step often results in project setbacks and additional costs.
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Whether you’re installing a decorative resin finish, a functional garage floor, or a permeable stone system, moisture testing forms the backbone of any successful preparation process. For more advice on preparing your base for resin flooring, visit our main preparation guide.
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