Metal lath

Selecting the correct metal lath depends on the application surface and plaster weight. Expanded Metal Lath (Diamond Mesh) is the most versatile for internal and external plastering. For large spans or horizontal ceilings, Rib Lath is preferred due to its V-shaped ribs which provide superior longitudinal rigidity. If you are working on contoured surfaces or arches, Self-Furring Lath is essential as it features dimples that hold the mesh 1/4 inch away from the surface, allowing the plaster to key thoroughly behind the lath.

B2B buyers must ensure products comply with ASTM C847 (Standard Specification for Metal Lath). For corrosion resistance, especially in exterior or high-humidity environments, specify G60 or G90 hot-dipped galvanized steel. In coastal areas, Grade 304 or 316 Stainless Steel is recommended to prevent structural failure due to salt spray. Always request a Mill Test Certificate (MTC) to verify the base metal's chemical composition and coating thickness.

The weight per square yard is the most critical metric; common standards are 1.75 lbs/yd², 2.5 lbs/yd², and 3.4 lbs/yd². Heavier weights are required for wider stud spacing to prevent sagging. Additionally, check the opening size of the diamond mesh; it must be consistent to ensure an even 'mechanical bond' or 'keying' of the stucco. For high-performance projects, verify the tensile strength of the steel to ensure it can withstand the curing shrinkage of cement-based plasters.

Focus on the Total Landed Cost, which includes the unit price, shipping volume, and potential waste. Since metal lath is bulky, nesting capabilities during packing can significantly reduce freight costs. Negotiate for bulk discounts on orders exceeding 5,000 sheets, where price reductions of 10-15% are common. Consider sourcing from integrated manufacturers on Made-in-China.com who handle both steel expansion and galvanization in-house to eliminate middleman markups.

The biggest risks are oxidation (white rust) during sea transit and physical deformation due to improper stacking. Ensure the supplier uses waterproof PVC wrapping and reinforced steel pallets. To mitigate quality risks, utilize third-party inspection services (like SGS or Intertek) to perform a 'mandrel bend test' and coating thickness check before the balance payment is made.

Leverage the volatility of global steel indices (like the London Metal Exchange) during negotiations. Request a price validity period of 7-14 days to protect against sudden raw material spikes. For long-term partnerships, negotiate flexible MOQ terms for specialized items like 'Paper-Backed Lath' while maintaining high volumes for standard diamond mesh to optimize container utilization.

Metal lath is a 'heavy cargo' item. To optimize shipping costs to countries like the US or UAE, use 20GP containers rather than 40HQ, as weight limits are usually reached before volume limits. Ensure the Incoterms are clearly defined as FOB or CIF; for first-time buyers, CIF (Cost, Insurance, and Freight) is often safer as the seller manages the complex maritime insurance for these sharp, heavy metal products.

Always conduct transactions through secure channels. Use Made-in-China.com's Secured Trading Service to ensure that payment is only released to the supplier after you provide proof of bill of lading or inspection clearance. Avoid direct wire transfers to private accounts; always verify that the beneficiary name matches the company name on the business license.