A mat or coating should follow investigation rather than conceal an unexplained patch. Record whether moisture appears after rain, washing or parking a wet car.
| Record | Include |
|---|---|
| Location | A sketch and photographs |
| Timing | Rain, parking and temperature changes |
| Surface | Coatings, cracks and damage |
| Nearby items | Mats and stored objects |
Inspect safely
Move lightweight objects to inspect underneath. Do not lift or move the vehicle without appropriate equipment and help. Seek building advice for persistent damp, damaged slabs or suspected drainage problems.
Ask before buying
Request the floor product's substrate moisture limits, preparation, drying conditions and compatibility instructions. A statement that something suits garages is not enough to specify it for this floor.
A room dehumidifier and an enclosure act on different spaces. Read dehumidifier selection and storage bubbles before assuming either fixes a building defect.
Review the result
Continue observations after repairs or installation. A returning patch warrants further investigation. This guide does not specify structural repairs or a damp-proofing system; those require an assessment of the building.
Sources
Sources & checks
Checked 2026-10-25. Read the original instructions before acting.