HouseChalk
Moisture testing
Moisture testing measures the water content in materials like concrete slabs, wood, or drywall.
Why it matters
Excessive moisture can cause flooring failures, mold, and finish problems. Testing before installing flooring or finishes prevents costly failures.
Where people get this wrong
There are different test methods. A calcium chloride test and a relative humidity probe test measure different things. Flooring manufacturers specify which test is required.
Real-world example
A slab looks dry but tests at 85% RH. The flooring manufacturer requires 75% or less. Waiting or using a mitigation system prevents the warranty from being voided.
Where this hits your build
This matters during site work and foundation. Mistakes here get buried and are expensive to fix later. Pay attention before concrete is poured.
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