Cupping

Cupping

Cupping

Moisture imbalance

Cupping

Moisture imbalance

Moisture imbalance

Measuring cupping at different depths within the board

Board edges are higher than the centers

Cupping

Cupping (Hardwood)

Floor Detective® Claims and Conditions Guide

Summary

Cupping is a dimensional distortion in hardwood flooring in which board edges are higher than the center, creating a concave profile across the width of the board. It develops from moisture-related imbalance through the board thickness and the natural tendency of wood to move more across its width than along its length. Although the visible appearance may be similar, movement behavior differs between solid and engineered wood due to construction. Cupping may develop gradually or rapidly depending on exposure conditions, moisture source, and system restraint. Visibility may be influenced by board width, finish, and

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