Impervious

Definition

Impervious refers to materials or surfaces that do not allow water or moisture to pass through or be absorbed. In ceramics, it signifies resistance to dye penetration and generally means zero absorption, except for floor and wall tiles which are considered impervious up to 0.5% water absorption.

Purpose

Impervious materials are used to prevent water infiltration, ensuring the durability and longevity of structures and surfaces by protecting them from water damage, mold, and mildew.

Examples of Use

• Using impervious tiles in bathrooms and kitchens to prevent water damage.
• Applying impervious coatings on roofs to enhance waterproofing.
• Installing impervious membranes in foundations to protect against groundwater infiltration.

Related Terms

• Waterproof: Completely resistant to water penetration.
• Water-Resistant: Able to resist the penetration of water to some degree but not entirely.
• Sealant: A substance used to block the passage of fluids through the surface or joints or openings in materials.

Notes

Impervious materials are critical in areas with high exposure to water and moisture, such as bathrooms, kitchens, and outdoor surfaces.