What are the main lath types used in California for plaster and stucco applications?

What are the main lath types used in California for plaster and stucco applications?

• A. Wood lath and metal lath (expanded metal and wire lath)
• B. Gypsum board lath and cement board
• C. Plastic lath and fiberglass lath
• D. Fiber cement boards and brick lath

Answer: (A)

Lath provides the base and keying surface for plaster and stucco, so knowing the usual bases is essential. In California, the standard lath types are wood lath and metal lath, which includes expanded metal lath and wire lath. Wood lath consists of thin strips nailed to the studs, giving plaster a rough surface to grip. Metal lath provides a durable mesh that greatly improves adhesion and helps resist cracking; expanded metal lath is common for stucco, while wire lath is used with plaster. Other options listed aren’t the traditional bases for plaster and stucco. Gypsum board lath and cement board can be used as substrates in some systems, but they aren’t the classic lath types. Plastic and fiberglass lath exist, but they’re not the primary, widely used lath in CA plaster and stucco work. Fiber cement boards or brick lath aren’t used as the lath itself.

Lath provides the base and keying surface for plaster and stucco, so knowing the usual bases is essential. In California, the standard lath types are wood lath and metal lath, which includes expanded metal lath and wire lath. Wood lath consists of thin strips nailed to the studs, giving plaster a rough surface to grip. Metal lath provides a durable mesh that greatly improves adhesion and helps resist cracking; expanded metal lath is common for stucco, while wire lath is used with plaster.

Other options listed aren’t the traditional bases for plaster and stucco. Gypsum board lath and cement board can be used as substrates in some systems, but they aren’t the classic lath types. Plastic and fiberglass lath exist, but they’re not the primary, widely used lath in CA plaster and stucco work. Fiber cement boards or brick lath aren’t used as the lath itself.