• High-Security Fencing Protection for Critical Infrastructure

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    Strong security starts with a reinforced physical perimeter. Many facilities are finding that the use of expanded metal fencing gives their premises a superior line of defense against external surveillance and threats. This type of fencing especially benefits critical infrastructure facilities such as


    • Water treatment plants
    • Petrochemical stations
    • Data centers
    • Power grids


    Expanded metal fencing provides a climb-proof physical barrier that prevents the incapacitation or destruction of these facilities. By doing so, it provides the first line of defense against threats to national security, public health, and confidentiality. In this post, we explore the many different ways anti-climb security fences are essential to facilities across the nation.

    security fencing protection solutions

    Security Fencing for Water Facilities and Wastewater Plants

    Wastewater treatment plants are critical to preserving public health and protecting the environment, which makes security at these facilities of the utmost importance. These facilities provide clean drinking water to more than 80% of the U.S. population, and they treat sewage produced by three out of every four U.S. households.

    Because these systems are so vital, they’re prominent targets for attack. This makes it essential to secure your facilities with high-security mesh fences along the exterior perimeter and to protect key internal spaces. Security fence panels enforce a hierarchy of access, especially when combined with strict access control systems.

    Use high-security fence systems as the first line of defense against attacks such as:

    • Chemical gas attacks
    • Intentional contamination
    • Cyberattacks that rely on proximity, network access, or the installation of physical hardware

    Petrochemical Industry Security Fencing

    Petrochemical plants and storage facilities are equally vulnerable to attack without industrial security fences. Targeted attacks on petrochemical plants can devastate supply chains for much of the nation’s economy and slow down global trade. Not to mention, damage to petrochemical plants can result in severe environmental damage that can have lasting effects on groundwater and soil quality.

    Developing and implementing a comprehensive safety and security program will help protect your employees as well as the public as a whole. Start by enclosing the whole property with an anti-climb mesh panel fencing that deters both illegal entrance and surveillance. Reinforced chain-link security gates can also monitor authorized access points.

    Once the property is enclosed, your security team can develop stricter internal security measures to oversee movement and activity on the site.

    Data Center Security Fencing

    Data centers across the country hold terabytes of the United States’ most critical personal, commercial, and government data. Many data centers rely on anonymity to fly under the radar, operating from nondescript, unmarked buildings. However, you can further strengthen your data center’s physical security by installing high-security mesh fences that provide an extra layer of defense without attracting attention.

    These fences can help keep unauthorized persons off the property entirely. Additional high-security fence systems protect generators, server rooms, and other potential access points of your facility.

    Not only do expanded metal fences prevent unauthorized access, they also help your security staff better monitor unusual activity. Wirewall high-security fence systems come with special abilities to let your staff see out without letting intruders see in. When your data center holds valuable data and hardware that powers the country’s digital systems, using expanded metal fencing is a must.

    High-Security Systems for Power and Utility Grids

    Power grids and high-voltage transformer units across the country provide the vast majority of electricity to the United States’ buildings and electronics. A failure in even one of these facilities can result in power loss for large swathes of the country. Interference at remote power facilities does not have to be malicious in intent, as people and animals can accidentally interfere with dangerous hardware at unprotected stations, endangering both themselves and the surrounding area.

    Anti-climb security fences are the first step for protecting your facilities and substations from both intentional attacks and accidental breaches. Anti-climb fencing can deter climbing trespassers, especially at far-flung locations without security personnel.

    Recent security exercises have focused congressional interest on the physical security of high-voltage transformers, prompting new grid security initiatives by utilities and federal regulators. Electrical substations in particular need more robust security features to deter both accidental and malicious intruders.

    Expand Your Defense with Metalex

    Metalex designs security fencing solutions tailored to all kinds of critical facilities. Because we manufacture our fences by slitting and stretching metal sheets, expanded metal won’t unravel and is incredibly durable. Each fence comes with diamond shapes that boost their strength and rigidity.

    We offer secure fencing solutions available in a wide range of sizes and patterns, and we also custom-cut metal products to your specifications. Contact us today if you would like to learn more about how we will help safeguard your facility against unauthorized entry.



  • Metal Solutions for the Architectural Industry

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    Metals have many inherent qualities, including strength, malleability, and durability, that make them ideal building components. Recently, architects and contractors have begun adopting new metal solutions to improve building performance, aesthetics, and safety. Two of the most common techniques, perforated and expanded metal, are particularly prized for their high strength, reliability, and flexibility, and their ability to provide high levels of security make them particularly beneficial for new or rehabbed buildings.

    Below, we’ve outlined some of the main uses of perforated and expanded metals, as well as some qualitative benefits they’ll bring to your next construction project.

    Metal Solutions

    Perforated and expanded metals can form a variety of innovative products, composites, and sustainable design solutions that will perform well across a range of climates and building types. Here are some of these metals’ most common applications:

    Ceiling Ducts

    Perforated metals evenly distribute air in ceiling ducts and reduce excessive noise typical to HVAC systems. Many companies provide a wide selection of architectural perforated metal products to be considered for each construction project.

    Security Mesh inside Walls, Ceilings, and Floors

    Barrier and security fence manufacturers use expanded metals to create meshes for use on walls, ceilings, or floors. Because of their inherent strength, expanded metal barrier meshes can protect against break-ins and break-outs, ensuring the safety of facilities and the people using them.

    Stairs, Railings, and Arches

    High-performance metals allow for complex, intricate designs in stairs, railings, and arches while meeting safety and durability requirements. By incorporating metal solutions into their plans, architects can design more creative and competitive solutions and incorporate delicacy into their design without sacrificing function.

    Siding and Roofing

    Because of their malleability, you can easily form perforated and expanded metals into a variety of shapes. Consequently, using these metals for your roofing or siding can be an extremely affordable, versatile, and effective solution, especially in high–wind uplift conditions.

    Other Uses

    Expanded and perforated metals also work well in architectural fencing, facades, lighting, doors, gates, lockers, office dividers, privacy screens, sunshades, sunscreens, windows, and skylight guards.

    Benefits of Metal Solutions in Architecture

    Making use of innovative new metal solutions allows for trade collaboration in the architectural industry. The large range of customization capabilities for perforated and expanded metals allows for a great deal of collaboration to take place between suppliers and clients. Because these metals can come in so many shapes, forms, and abilities, they offer limitless possibilities.

    High-performance materials such as expanded and perforated metals also boost your buildings’ integrity and longevity. Their ability to easily form and conform to new applications enables these metals to provide solutions to previously hard-to-solve problems.

    Finally, implementing new metal-forming techniques helps architects meet or exceed building code requirements for complex issues such as water penetration, uplift ratings, fire protection, and seismic and structural performance.

    Use Perforated and Expanded Metals in Your Next Construction Project

    New metal-forming techniques are taking the market by storm. Adopting perforated and expanded metals for your next architectural project will provide the same degree of security and metal coverage as other techniques, but will consume fewer resources while doing so

  • The Security Challenges of Construction Sites

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    Proper security fencing on constructions sites is crucial not only to internal site safety, but also public safety. A construction fence protects the public from accidental intrusions or injuries, prevents would-be thieves from stealing construction materials or equipment, and wards off other external hazards such as wild animals. While there are a variety of fencing solutions available to provide security fencing at construction sites, the most effective solution available today is expanded metal mesh fencing.

    The Benefits of Expanded Metal Mesh Security Fences

    While everyday fences have traditionally been used to site secure construction sites, security and construction professionals have begun to discover that expanded metal fencing addresses a number of security concerns that common fences cannot.  Expanded metal is cut resistant, making them much stronger than everyday fences. Similarly, its smaller openings make climbing difficult while preventing anybody from seeing through it.

    To get maximum security benefits from fencing, make sure to set it up as far in advance of the project as possible. This gives people in the surrounding area a chance to get used to the fence’s presence, establishes the perimeter of the project site, and lets passersby know well in advance that the site will be secure. To ensure beginning-to-end project safety and security, the fencing should be the last thing to come down after the project is completed. This will be especially useful at the beginning and end of the project, when curious trespassers may try to get into the site.

    Construction Site Security Tips

    When planning your construction site fencing and security, consider the following:

    Fence Height

    Put up the tallest expanded metal mesh security fence possible to make it even more difficult to climb. Fence toppers such as concertina wire may also be applied to ensure that climbing over the fence is nearly impossible.

    Points of Entry

    If possible, limit site access to a single entry/exit point. This makes it much more difficult for unauthorized visitors to get into the site without detection, where they could injure themselves and hold the construction company or project owner legally and financially responsible. If the project requires multiple entrances, make sure that gates can be secured, that there is no room to slip underneath the gate when it is unattended, and that key control for points of entry is strictly controlled.

    Metal Mesh Storage

    Much like expanded metal mesh fencing, metal mesh storage cages are exceedingly difficult to cut or damage, ensuring that all equipment can be stored safely while not in use.

    For those who want additional options beyond the security provided by metal mesh fencing and cages, other potential security solutions include security guards, flood lighting, signage, and visible security cameras. Any or all of these things can complement the security provided by your expanded metal mesh security fence.

    By itself, a metal mesh security fence offers an array of essential features, including:

    • A surface that resists climbing
    • Greater resistance to cutting
    • Increased security levels
    • Uniform structure and rigidity
    • Easy delivery
    • Simple installation

    Expanded Metal Mesh Fence Applications

    Expanded metal mesh fences are an ideal solution for high-security applications such as:

    • Substation security
    • Perimeter security
    • Electrical grid security
    • Homeland security
    • Parks and recreation security
    • Stadiums and arenas security
    • Data center security
    • Petro-chemical security
    • Water and wastewater security
    • Manufacturing security
    • Warehouse and distribution security
    • Many other security applications

    Compared to other fencing solutions, expanded metal solutions from Metalex feature many ideal qualities for security such as:

    • Strength
    • Visual barriers
    • Greater levels of security
    • Uniform structure and rigidity
    • Resistance to cutting
    • Corrosion resistance
    • Long service life
    • Simple to maintain

    Metalex has been in the business of providing expanded metal solutions since 1962. To learn more about Metalex’s expanded metal mesh products, view our wide range of expanded metal mesh sizes and check out our expanded metal sizes chart. If you don’t see what you need, our capabilities extend beyond our standard products. We offer many special patterns and custom solutions, so contact our design and engineering teams if you have a special project or design need. We offer practical recommendations and solutions that are specific to your needs.

    For more information, contact us or request a quote today.

  • 5 Reasons Why Manufacturers Are Choosing Expanded Metal Over Standard Security Fencing

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    Designed to provide reliable, high-performance protection for critical areas while ensuring optimal personnel safety, expanded metal security fencing products must be able to stand up to harsh environments, provide ultimate strength, and allow for long-lasting durability in order to effectively keep out intruders.

    The electric power industry, for instance, relies heavily on expanded metal security fencing, particularly for substation security applications. Substation security fencing must protect more than the facility itself; it also must protect personnel, as well as accidental trespassers — both humans and animals — from the hazards posed by high-voltage equipment.

    Of course, the power grid is not the only industry making use of expanded metal security fencing. Other sectors relying on metal security fencing include:

    • Utilities
    • Manufacturing
    • Airports and seaports
    Rail lines
    • Correctional facilities
    • Border security
    • Retail

    5 Advantages of Expanded Metal Fencing

    Aside from providing great versatility, customizability, and ease of use, expanded metal security fencing offers five key advantages over standard security fencing.

    expanded metal for security fencing

    High Strength

    Expanded metal fencing is much stronger than even the strongest standard fencing. The expansion process adjusts the metal, rather than removing or reshaping it, so any reductions in strength properties are minimal, and the metal remains reliably rigid.


    A decent pair of bolt cutters and a little elbow grease are all it takes to cut through the wire of a standard fence, and when a cut is made, the fencing can be easily unraveled or pushed aside. It’s almost impossible to gain purchase on expanded metal with bolt cutters, however, and even then, making actual cuts is nearly impossible.

    Superior Visual-Barrier Properties

    Standard fencing is basically see-through, offering little in the way of blocking line of sight. Expanded metal mesh, on the other hand, can be specifically designed to minimize gaps while maximizing metal surface; this makes metal fencing ideal for security scenarios prioritizing visual-intrusion prevention.


    Standard fencing with typical specifications leaves gaps of about 2 inches between wires, more than enough room for somebody to gain purchase with their hands or feet for climbing. But expanded metal security fencing features gaps as small as ½ or ¾ inch, making climbing virtually impossible.

    High Durability

    Expanded metal security fencing is much more durable than standard security fencing; expanded metal is less prone to rusting and damage, and provides a longer life span.

    Expanded Metal Security Fence Specifications

    Expanded Metal

    Extremely versatile, expanded metal is available in a wide range of styles, materials, mesh patterns, and sizes, making it an ideal solution for various security needs.

    For example, metal fencing is available in both standard expanded metal and flattened expanded metal types; as its name implies, flattened expanded metal is flattened after expansion to allow for smooth surfaces. Security fencing can also be customized for a range of fence heights and post types, and is available with integrated horizontal rails, as well as the fittings used to secure expanded metal mesh to the fence framework. And adding special features, such as barbed wire and barbed tape, is much easier with expanded metal than standard fencing.

    Expanded Metal Fencing From Metalex

    For 55 years, Metalex has been a leading designer and manufacturer of high-quality expanded metal products, available in a range of mesh types, including:

    Large, heavy, and grating mesh — Providing ultimate strength, flexibility, versatility, and cost-efficiency, these types of high-performing mesh are frequently used in parks and recreational facilities, shelving, catwalks, and automotive racks, in addition to serving as traditional electric grid security fences and machine guards.

    Micro mesh — With superior heat-transfer properties, micro mesh can be built to be acoustically neutral and can also be flattened to allow for reduced thickness and a smoother surface. Micro mesh is designed to be non-testing, and can be annealed for superior formability. It can also be coated with organic or metallic compounds to allow for extra durability.

    Light and small mesh — Used in a wide range of applications, such as air filtration, ceiling panels, and machine guards, light and small mesh offers optimal reliability and versatility. Small mesh is usually offered in sizes between 3/16 inch and ½ inch, and can be constructed from various materials.

    Barrier and security mesh — Specifically designed to safeguard against break-ins and break-outs, security and barrier mesh can provide protection for walls and ceilings in various spaces, such as homes, offices, retail stores, correctional facilities, and storage areas.

    Intermediate mesh — Offering great flexibility, intermediate mesh is popular in a wide range of industries. It can be constructed from various materials, including cold-rolled steel, stainless steel, galvanized steel, aluminum, and copper.

    Learn More

    Considering expanded metal for your next security fencing project? Download our comprehensive Security Fencing Data Sheet or visit our security fencing page to learn more.


  • How to Protect the Grid with Stronger Security Fencing

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    The Threat Against Utility Substations

    Last year, two people broke into an electrical substation in Bakersfield, Calif., run by Pacific Gas & Electric Co. (PG&E), and cut several transformer wires.

    The following night, critical equipment and alarm wires were cut.

    security-fencing-expanded-metalIn 2013, a group with firearms attacked another PG&E facility, the Metcalf transformer substation in San Jose, Calif., disabling 17 transformers that power Silicon Valley. Multiple individuals outside the substation shot at the HV transformer radiators, causing them to overheat and become inoperative. This same high-voltage substation was attacked again in 2014, when intruders damaged and stole various equipment, staying for as long as four hours without being noticed.

    These attacks represent just a few of the dozens of utility attacks that occur in the United States every year. And despite rules issued by the Federal Energy Regulatory Commission (FERC) in 2014, most transformer sites and substations are protected by little other than chain-link fence.

    In today’s tumultuous geopolitical climate, firearm attacks are of mounting concern. In a Congressional Research Service report published in 2014, our power grid — its high voltage (HV) transformers in particular — was identified as a likely terrorist target. Though making up only 3% of the hundreds of transformers in the grid, HV transformers carry as much as 70% of the nation’s energy.

    Lax security measures for HV transformers leave the whole grid vulnerable to destabilizing attacks. To ensure the security of our national utility substations, efforts must be made to effectively deter intruders and reduce the risk of break-ins.

    Expanded Metal: Superior Fencing Protection & Ballistic Resistance

    Most of our nation’s transformer substations are physically protected by chain-link fence and nothing more. Substation security occasionally includes security cameras and alarm systems, but, even then, they’re usually not regularly monitored.

    Physical security, therefore, remains the ideal first line of protection; it is passive and relatively inexpensive. But standard chain-link fencing is notoriously weak, easily able to be cut or otherwise compromised. Expanded metal security fencing is a much more reliable solution.

    Visual Barrier

    Expanded metal security fencing provides a number of benefits over traditional chain-link fencing, all of which satisfy recommended best practices for substation security perimeters. The smaller openings and rigid design make it extremely difficult to climb and also act as an added visual barrier to protect HV transformers from becoming targets.

    Ballistic Resistance

    Expanded metal security fencing is also much stronger and thicker than chain-link. Chain-link fencing can be cut with standard bolt cutters with relative ease, while expanded metal cannot. Expanded metal also resists bending and fraying and is physically unable to be taken apart, unlike chain-link. Added thickness allows the fence to shatter and deflect small caliber bullets, further protecting the substation.

    Learn More

    Metalex has been designing and manufacturing reliable, high-quality security fencing and other expanded metal products since 1962, and is proud to be at the forefront of enhanced substation security.

    If you’re considering expanded metal for your next security fencing project, download our Security Fencing Data Sheet for material specifications or visit our Security Fencing page.

    See the Security Fencing Infographic