Everything You Need To Know About The Production And Installation Of Expanded Mesh


Expanded metal is a versatile material created by processing metal sheets through special machinery to form a mesh-like structure. It possesses several key characteristics, such as rust resistance, vibrant colors, aesthetic appeal, durability, high quality, and a wide range of applications. In the context of construction, expanded metal is widely used for outdoor façades due to its exceptional strength against adverse weather conditions, ease of maintenance, and its ability to provide visual appeal. When used indoors as roofing or partition walls, its unique transparency and sheen contribute to enhanced aesthetics.

This SEO article will delve into how expanded metal is made, the process involved, and the installation of expanded metal lath.

How Is Expanded Metal Made?

Expanded aluminum mesh is primarily produced through two continuous automatic processes: punching and stretching, resulting in a mesh-like material. When used for decorative purposes, aluminum expanded metal may also require a welded frame for ease of installation, followed by the application of the desired coating colors to achieve a visually appealing decorative effect.


One of the significant advantages of aluminum expanded metal is its high recyclability, aligning with the principles of sustainability. It is a genuinely green building material. Aluminum expanded metal is often combined with lightweight structures, effectively reducing the weight and load of building envelope systems, which aids in construction, installation, and maintenance.

There are multiple grid patterns available for aluminum expanded metal, including hexagonal, diamond, fish scale, and more. Users have a wide range of choices, and various color systems can be achieved through painting, allowing for personalized decorative appearances.

Key Points in the Production of Expanded Metal


Stretching must occur when the aluminum alloy profiles have cooled to below 50 degrees Celsius to prevent scalding and hairline cracks caused by internal stresses in the profiles. Elevated temperatures during stretching can result in irregularities, twisting, and functional defects, leading to waste.

Control the stretching amount to around 1%, and be cautious of excessive stretching, which can lead to dimensional variations along the length of the profiles, surface patterns like fish scales, reduced elongation, and increased hardness (resulting in brittleness). Insufficient stretching can lead to lower compressive strength and hardness in profiles, and hardening through heat treatment becomes ineffective, resulting in profiles prone to warping.

Use suitable specialized spacers and methods to control stretching deformation and maintain consistent dimensions throughout the profiles. Special attention should be paid to profiles with open sections, curved shapes, and varying wall thicknesses to avoid local or point deformation, twisting, or spiraling.

Profiles with high aspect ratios, long cantilevers, large radii, significant differences in wall thickness, and unusual shapes require careful consideration of stress distribution, preventing partial or point deformation, twisting, or spiraling.

To address the heat-retaining effect of weather stripping, aluminum profiles with high aesthetic demands should be flipped horizontally, vertically, front-to-back, and back-to-front to facilitate even heat dissipation, reducing the occurrence of uneven crystallization and resulting streaks, especially in wide and thick-walled aluminum profiles.

During material handling and transport, avoid collisions, pulling, stacking, congestion, and entanglement of profiles. Timely handling and maintenance are essential for profiles prone to deformation and varying lengths, ensuring they remain in optimal condition.

Expanded Metal Lath Installation

Expanded metal mesh is a vital construction material used in both exterior and interior wall decorations, as well as supporting plasterboard in the construction and architectural industries. To ensure proper installation for structural integrity and safety, follow these steps:

Preparation: Before starting, inspect the surface to ensure it’s smooth, dry, and clean. Have safety equipment (gloves, goggles, mask) and tools (cutters, screwdrivers, rivet gun) ready.

Measurement and Cutting: Accurately measure and cut the expanded metal mesh to fit the area. Ensure smooth edges.

Installing Angle Iron: Attach angle iron at edges and corners for added support using screws and a wall drilling tool.

Securing the Mesh: Place the mesh on the surface and use a rivet gun to secure it to the angle iron. Ensure even riveting.

Overlap and Connect: For larger areas, use multiple mesh sheets, overlapping and connecting them securely.

Check for Level and Plumb: Use a level and plumb line to ensure the mesh is level and plumb.

Trimming Edges: Trim protruding edges with cutting tools, ensuring a smooth finish.

Cleaning and Painting: After installation, clean the mesh and apply primer and paint if needed for aesthetics and protection.

Final Inspection: Inspect for secure fastenings and connections.

Proper installation is essential for stability and aesthetics. Seek professional assistance if unsure. Follow these guidelines for optimal performance in your construction project.

Types of Woven Metal Mesh


Plain Weave Metal Wire Cloth: Plain weave is the most common and simplest form of woven metal wire cloth. The warp wires pass over and under weft wires at right angles, creating a grid pattern.

Twill Square Weave Metal Wire Cloth: Twill square weave involves each warp wire passing over and under two weft wires, creating a diagonal appearance. This weave allows for the use of heavier metal wires with specific mesh counts, enabling higher load-bearing capacity and improved filtration.

Dutch Plain Weave Metal Wire Cloth: Dutch plain weave wire mesh is similar to plain weave but with heavier warp wires. This type of weave is often used for metal wire filters.

Dutch Twill Weave Metal Wire Cloth: Dutch twill weave is similar to twill square weave but with heavier warp wires. It can handle larger loads and is suitable for applications requiring filtration of heavy substances.

Twilled Dutch Weave Metal Wire Cloth: Twilled Dutch weave combines features of twill square weave and Dutch plain weave. It has a compact design with higher strength and finer filtration capabilities.

Crimped Wire Cloth: Crimped wire cloth features wavy or crimped wires. This design offers enhanced rigidity and durability, making it suitable for heavy-duty applications.

Lock Crimped Wire Cloth: Lock crimped wire cloth is a modification of crimped wire cloth with additional locking sections, providing greater stability and resistance to vibration.

Reverse Dutch Weave Metal Wire Cloth: Reverse Dutch weave is a robust weave pattern, known for its strength and durability. It is often used in demanding industrial applications.


Expanded metal, especially in aluminum alloy form, is a remarkable material known for its versatility and sustainability. Understanding the production process, including key factors like temperature control and stretching, is crucial to ensuring the quality and performance of expanded metal products. Additionally, there are various types of woven metal wire cloth with unique characteristics suitable for different applications. This comprehensive knowledge of expanded metal and metal wire cloth types enhances their effective utilization in construction, filtration, and other industries. For expanded metal lath installation, it is important to consider the specific requirements and design aesthetics to achieve desired results.