See where the moisture is — across the whole floor.
Moisture mapping is a grid-based survey of the slab or floor area using non-destructive meters. It shows where moisture is concentrated, where it isn't, and where quantitative ASTM testing (F2170 or F1869) should be placed. It is the fastest way to understand the full picture before you drill or remove anything.
Who it helps
Builders, flooring contractors, restoration companies, property managers, adjusters, and homeowners who need to know the extent of moisture across a floor — not just at a few points.
When it's relevant
Before installation on large or suspect slabs, after a leak or flood to define the affected area, during drying to track progress, and before ASTM testing to choose the right test locations.
What's included
- Grid-based survey of the agreed floor area
- Readings with non-destructive moisture meters on concrete and floor coverings
- Marked-up floor plan / moisture map showing dry, elevated, and wet zones
- Ambient temperature and relative humidity documentation
- Recommended locations for ASTM F2170 / F1869 testing where needed
- Photo documentation
Site access
Mapping is non-destructive and can usually be performed over bare concrete and many existing floor coverings. A simple floor plan or sketch helps, but is not required.
What you receive
- A moisture map of the surveyed area
- Readings by location with ambient conditions
- Plain-language summary of affected and unaffected areas
- Recommendations for quantitative testing or re-checks during drying
Limitations
- Meter readings are comparative (relative) values. They show where moisture is higher or lower but are not a substitute for ASTM F2170 or F1869 where a flooring manufacturer specifies those methods.
- Readings represent conditions at the time of the survey.
Common questions
Is moisture mapping the same as an RH test?
No. Mapping shows the spread of moisture across the floor. ASTM F2170 (RH probes drilled into the slab) and F1869 (calcium chloride) give the numbers that are compared to flooring and adhesive limits. Mapping tells us where those tests should go.
Can you map over existing flooring?
Often, yes. Many floor coverings can be surveyed without removal. We confirm what's possible for your floor during scoping.
Do I need mapping after a water leak?
It's the best way to define how far the water traveled under the floor and to track drying until the floor is ready for repair or new flooring.