Janka Hardness Rating
Janka Hardness Rating (Wood Flooring)
Floor Detective® Defect Guide
What You Need to Know
• The Janka hardness test measures the force required to embed a 0.444-inch steel ball to one-half of its diameter into a wood sample
• Janka hardness values are expressed as numerical ratings and are commonly used to compare the relative resistance of wood species to surface denting
Grain Raise (Hardwood Finish Issue)
December 16, 2025
Grain Raise (Hardwood) Floor Detective® Defect Guide What You Need to Know • Grain raise is an appearance-related surface condition...
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Splits – Cracks
August 7, 2023
Splits and Cracks (Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know • Splits and...
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Wood Distortion
December 5, 2022
Wood Distortion (Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know • Wood distortion refers...
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Wood Shear (Engineered Flooring)
January 1, 2022
Wood Shear vs. Delamination (Engineered Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know •...
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Hollow Sounds
October 20, 2021
Hollow Sounds (Hardwood Flooring) Floor Detective® Claims and Conditions Guide What You Need to Know • Hollow sounds are audible...
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Dry Cupping – Engineered Hardwood
March 22, 2021
Dry Cupping (Engineered Hardwood) Floor Detective® Claims and Conditions Guide What You Need to Know • Dry cupping is a...
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White Lines
March 17, 2021
White Line Syndrome (Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know • White Line...
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Water Damage (Hardwood)
March 17, 2021
Water Damage (Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know • Hardwood flooring is...
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Vapor Retarder
March 16, 2021
Vapor Retarders (Hardwood Flooring) Floor Detective® Flooring Claims and Conditions Guide What You Need to Know • A vapor retarder...
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