gypsum lath
building material
Quick Summary
Gypsum lath is a building material used as a base for plaster. It consists of a gypsum core enclosed between two layers of paper. Sheets with reflective foil backing can offer insulation and act as a vapor barrier. Gypsum itself is a natural mineral, a hydrous sulfate of calcium. While gypsum lath is a type of lath, it's distinct from drywall, which is a large, rigid sheet used in drywall construction to finish interior walls without mortar or plaster.12
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