Moisture Testing:
A manufacturers approved moisture test is recommended over all concrete
sub floors, and wood sub floors constructed over a crawl space or basement.
Be sure to record the test results in a reliable manner for future reference. Certified Flooring Inspectors may be hired to perform Moisture Testing.
The maximum acceptable moisture reading for wood sub floors is 14%. A Tramex Moisture Encounter Plus MEP is a non destructive meter that measures the moisture content of a wood sub floor.

Concrete sub floors
The maximum acceptable moisture reading for concrete sub floors must not exceed the manufacturer’s recommendations.Some manufacturers accept a meter reading and some require a Calcium Chloride Test.
The Calcium Chloride Test defines the water vapor emission rate of a
concrete sub floor. The maximum emission rate for laminate flooring varies
from product to product.
The tests must remain in place undisturbed for 60 – 72 hours before
harvesting and weighing.
Follow the manufacturers test procedures precisely to obtain an accurate
result.
Refer to ASTM E 1869 for complete testing procedures; Certified Flooring Inspectors may be hired to perform Moisture Testing.

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