Moisture expansion, also known as moisture-swelling or hygroscopic expansion, refers to the increase in volume or dimensional changes that materials undergo when they absorb moisture from the environment. This phenomenon is particularly common in porous materials like wood, concrete, clay, and certain polymers. ### Key Aspects of Moisture Expansion: 1. **Materials Affected**: - **Wood**: Wood can swell significantly when it absorbs water, leading to warping or cracking.
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