Self Furring Roll Fiberglass Lath

SpiderLath Self-Furring Roll Fiberglass Lath — Lightweight, Rust-Free Metal Lath Alternative for Stucco, Stone & Masonry

SpiderLath is a patented self-furring fiberglass lath system engineered as a direct replacement for traditional metal lath in stucco, stone, and masonry applications. Each 25 ft x 4 ft roll covers 100 sq. ft. — equivalent to approximately 5.5 sheets of standard metal lath — reducing material handling and jobsite logistics. Designed for both commercial and residential contractors, SpiderLath eliminates the rust, corrosion, and sharp-edge hazards associated with metal lath while meeting ASTM AC275 ICC-ES acceptance criteria for glass fiber lath used in cementitious exterior wall coatings and exterior cement plaster (stucco). Its compact, lightweight form factor makes it faster to cut, install, and transport than conventional metal lath.

Technical Specifications

Unlike standard metal lath, SpiderLath's fiberglass construction eliminates rust and corrosion risk over the life of the installation, while its patented self-furring foam strip serves simultaneously as a gasket sealer and fastening guide — functions that require separate components with metal lath systems. The roll format consolidates coverage into a single manageable unit, reducing the number of individual sheets a crew must stage, cut, and fasten on the wall.

Key Features & Benefits

Patented Self-Furring Foam Strip

The integrated foam strip acts as both a gasket sealer and a fastening guide, eliminating the need for separate furring components. This built-in feature streamlines installation and helps ensure consistent embedment depth for the cementitious coating.

Faster Installation — Up to 50% Time Savings

SpiderLath is designed to install up to 50% faster compared to metal lath. The lightweight roll format, easy cutting, and self-furring strip reduce the number of steps and the amount of labor required per square foot, directly lowering installed cost on every job.

Lightweight & Compact

At just 7 lbs per 100 sq. ft. roll, SpiderLath is significantly lighter than an equivalent coverage area of metal lath sheets. Easier handling reduces crew fatigue and simplifies transport and storage on the jobsite.

No Rust or Corrosion

Fiberglass construction means SpiderLath will not rust or corrode, even in moisture-exposed exterior applications. This eliminates a common long-term failure mode associated with metal lath and reduces callbacks related to rust bleed-through in finished stucco surfaces.

Code-Approved Performance

SpiderLath meets ASTM AC275 – ICC-ES acceptance criteria for glass fiber lath used in cementitious exterior wall coatings and exterior cement plaster. Contractors can specify and install it with confidence on permitted commercial and residential projects.

Superior Strength vs. 2.5 Metal Lath

SpiderLath surpasses the strength of 2.5 lb metal lath, providing a robust substrate for cementitious coatings while also being engineered to minimize cracking in the finished surface.

Safe to Handle — No Sharp Edges

Unlike metal lath, SpiderLath has no sharp edges, reducing the risk of cuts and lacerations during handling and installation. This contributes to a safer jobsite and can reduce the need for heavy gloves that slow down detailed work.

Common Applications

Exterior Stucco Systems

SpiderLath meets ICC-ES acceptance criteria for glass fiber lath used in cementitious exterior wall coatings and exterior cement plaster, making it a direct code-compliant substitute for metal lath in three-coat and one-coat stucco systems.

Stone Veneer Installation

Provides the substrate and embedment plane required for adhered stone veneer applications on both commercial and residential structures.

Masonry Cladding

Suitable as a lath substrate for masonry cladding systems where a rust-free, lightweight reinforcement layer is required over sheathing or framing.

Decorative Concrete Finishes

Compatible with decorative concrete applications where a fiberglass lath substrate is needed to reinforce the cementitious coating layer.

Natural Thin Stone

Engineered to support natural thin stone installations, providing the necessary mechanical key for mortar adhesion without the weight and corrosion risk of metal lath.

Compatible Materials

• Exterior cement plaster (stucco)
• Cementitious exterior wall coatings
• Adhered stone veneer
• Masonry cladding systems
• Decorative concrete coatings
• Natural thin stone

Frequently Asked Questions

Q: How does one roll of SpiderLath compare to standard metal lath sheets in terms of coverage?
A: One 100 sq. ft. roll of SpiderLath is equivalent to approximately 5.5 sheets of standard metal lath, reducing the number of individual pieces a crew must handle and install.

Q: Is SpiderLath approved for use on permitted stucco projects?
A: Yes. SpiderLath meets ASTM AC275 – ICC-ES acceptance criteria for glass fiber lath used in cementitious exterior wall coatings and exterior cement plaster (stucco), making it code-approved for commercial and residential permitted work.

Q: What is the purpose of the self-furring foam strip?
A: The patented foam strip serves as both a gasket sealer and a fastening guide, providing the standoff from the substrate needed for proper mortar embedment while also helping guide fastener placement during installation.

Q: Will SpiderLath rust or corrode over time?
A: No. SpiderLath is made from fiberglass and will not rust or corrode, eliminating a common long-term durability concern associated with metal lath in exterior moisture-exposed applications.

Q: How does SpiderLath compare in strength to metal lath?
A: SpiderLath surpasses the strength of 2.5 lb metal lath, providing a durable reinforcement substrate while also being engineered to help minimize cracking in the finished cementitious surface.