Flooring
FF and FL Numbers Explained: Concrete Floor Flatness and Levelness
Learn what FF and FL numbers mean, how they’re measured under ASTM E1155, and how to use them to prevent flooring and TI issues.
Learn what FF and FL numbers mean, how they’re measured under ASTM E1155, and how to use them to prevent flooring and TI issues.
Learn what FF25 means, where it may be acceptable, and how low flatness can create flooring failures and TI delays.
Learn what FF35 floor flatness means, how it’s measured under ASTM E1155, and what to do if your slab doesn’t meet spec.
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