Crowning

Crowning

crowning-29446

Crowning

Sierra Exif JPEG

Crowning

Sierra Exif JPEG

Crowning

crowning-64391

Crowning

Sierra Exif JPEG

Board edges are lower than the centers

crowning-6391

Crowning

Sierra Exif JPEG

Crowning

crowning-29443

Board centers are higher than the edges

Crowning-2150

Cupped floor sanded with high moisture crowned after drying out

crowning-29445

Crowning

crowning-29446 Sierra Exif JPEG Sierra Exif JPEG crowning-64391 Sierra Exif JPEG crowning-6391 Sierra Exif JPEG crowning-29443 Crowning-2150 crowning-29445

What you need to know

Crowning is a type of warp where the center of the affected boards are higher than its edges(convex). It normally occurs when a previously cupped floor is sanded before it has dried to its equilibrium moisture content. Excessive moisture conditions such as flooding, leaks, excessive moisture in crawl spaces and basements will often cause a floor to cup. If the high edges of the cupped floor

Industry Standards

The National Wood Flooring Association states the following on page 8 of the 2018 Technical Publication C200, Problems, Causes and Cures:

Crowning
DEFINITION: A convex or crowned appearance of individual boards with the center of the board higher than the edges. This can also be a type of warp.
CAUSES: …..

Technical Guidelines

Please subscribe to see all content

Subscribe Login

Splits – Cracks

The 2018 National Wood Flooring Association Publication C200, Problems, Causes, and Cures, states the following on page 14. Splits/Cracks Definition:...
Read More
Splits – Cracks

Wood Distortion

What you need to know The National Wood Flooring Association (NWFA) states the following on page 4 of the 2018...
Read More
Wood Distortion

Wood Shear (Engineered Flooring)

What you need to know The National Wood Flooring Association (NWFA) states the following on page 9 in 2018 Technical...
Read More
Wood Shear (Engineered Flooring)

Hollow Sounds

  The National Wood Flooring Association (NWFA) states the following on page 28 of the 2018 Technical Publication C200, Problems,...
Read More
Hollow Sounds

Dry Cupping – Engineered Hardwood

What you need to know The National Wood Flooring Association states the following on page 8 of the 2018 Technical...
Read More
Dry Cupping – Engineered Hardwood

White Lines

What you need to know White Line Syndrome (WLS) is a condition that can occur on a site-finished floor that...
Read More
White Lines

Water Damage

What you need to know Water damage to laminate and hardwood flooring can be caused by several factors: Moisture seepage:...
Read More
Water Damage

Vapor Retarder

What you need to know A vapor retarder is a vapor-resistant material.  In new construction, vapor retarders are often architecturally...
Read More
Vapor Retarder

Splinters (Slivers)

What you need to know The National Wood Flooring Association states the following on page 14 of the 2018 Technical...
Read More
Splinters (Slivers)

Side Bonding

What you need to know Side bonding is a condition whereby wood flooring boards are unintentionally glued together along their...
Read More
Side Bonding