Building a durable and effective fence is a critical investment for any agricultural operation, and using wire mesh is one of the most reliable and versatile methods available. This guide provides a comprehensive, step-by-step approach to constructing a wire mesh farm fence, covering everything from initial planning to final tensioning. A well-built wire mesh fence serves multiple essential functions, including securely containing livestock such as sheep, goats, and poultry, protecting crops from wildlife, and clearly defining property boundaries. The process, while requiring some physical effort and planning, is highly achievable for a determined DIYer and results in a barrier that can last for decades with minimal maintenance. The key to success lies in understanding the materials, executing proper post-setting techniques, and applying the mesh correctly to withstand weather and animal pressure.
Wire mesh, often referred to as wire netting, comes in various classifications and weaving patterns, each suited for different applications. The most common classification is based on the wire gauge (thickness) and the mesh opening size. For instance, a lighter 19-gauge mesh with small openings (like 1-inch hexagon or 2×4 inch rectangle) is ideal for enclosing poultry runs or garden beds to keep out small predators and birds. For larger livestock like goats or pigs, a heavier 14-gauge mesh with 4×4 inch or 6×6 inch openings provides the necessary strength and visibility. The weaving style also impacts functionality; a welded mesh, where wires are fused at each intersection, creates a very rigid and strong panel perfect for gates or high-pressure areas. Conversely, a woven mesh, where wires are intertwined, offers more flexibility, which is beneficial for rolling over uneven terrain without losing integrity. Choosing the right combination is crucial; for a general-purpose livestock fence, a galvanized, woven 14-gauge mesh with 4-inch squares is an excellent and economical choice.
The primary material for agricultural wire mesh is steel, almost always coated for corrosion resistance. The most common coating is galvanization, which involves coating the steel in a layer of zinc. There are two main types: galvanized before welding (GBW) and galvanized after welding (GAW). GAW is generally superior for fencing as the zinc coating covers the welded joints, offering complete protection against rust and significantly extending the fence’s lifespan, especially in humid or coastal environments. Another high-end option is polymer-coated (PVC-coated) wire mesh, where a plastic layer is fused over the galvanized wire. This adds an extra layer of protection against corrosion and provides a colored finish (often green or black) that blends into the landscape. The core characteristics to evaluate are tensile strength, which determines how much pulling force the wire can withstand before breaking, and the ductility, which allows it to absorb impact without snapping. For a permanent farm fence, investing in high-tensile, GAW galvanized mesh is recommended for its optimal balance of longevity and strength.
The application of wire mesh fencing in agriculture is extensive and varied. Its primary use is for livestock enclosures, creating secure pens, pastures, and boundary fences that prevent animals from wandering and protect them from external threats. For example, a farmer raising sheep might use a 32-inch tall mesh fence around a pasture, supplemented by a single electric wire at the top to deter jumping. Beyond animal containment, wire mesh is indispensable for protecting crops. A common scene in vineyards or orchards is the use of tall, sturdy mesh fences to keep out deer and other foraging wildlife that can cause devastating economic loss. Furthermore, it serves in specialized roles such as constructing compost bins, reinforcing drainage ditches, or creating trellises for climbing plants. Its versatility makes it a fundamental material for both large-scale commercial farms and small homesteads, addressing security, organization, and protection needs across the entire property.
Frequently Asked Questions (FAQ)
What tools do I need to build a wire mesh fence? Essential tools include post hole diggers or an auger for setting posts, a sturdy hammer or post driver, wire cutters, fencing pliers, a come-along or fence stretcher for tensioning, and safety gear like gloves and goggles. A level and string line are also vital for ensuring your fence line is straight and your posts are plumb.
How deep should my fence posts be set? As a general rule, bury at least one-third of the post’s length, and a minimum of 2 feet deep, for line posts. For corner and gate posts, which bear the most tension, bury them deeper—up to half their length or 3.5 feet. In areas with frost, set posts below the frost line to prevent heaving.
How far apart should fence posts be spaced? For a standard wire mesh fence, space line posts 8 to 12 feet apart. Closer spacing (8 feet) provides more support and is advisable for very tall fences or in areas with high wind or animal pressure. Using sturdy wooden posts at corners, gates, and ends is non-negotiable for strength.
How do I attach the wire mesh to the posts? Use galvanized fencing staples (u-nails) for wooden posts. Do not hammer them in fully; leave a small gap so the wire can move slightly during tensioning and temperature changes. For metal T-posts, use the included wire clips or specialized zip ties designed for fencing, ensuring each clip securely wraps around both the post and the mesh wire.
How do I stretch the wire mesh to make it tight? Never install mesh straight from the roll without tensioning. Unroll it along the fence line, attach it temporarily to one end post, then use a come-along or fence stretcher attached to the other end to pull it taut. The mesh should be firm but not drum-tight, allowing for slight flex. Secure it permanently once tensioned.
How do I handle uneven ground? For rolling terrain, follow the contour of the land. You can install the mesh with a slight “scalloped” effect, dipping into hollows and rising over hills, which is more effective than trying to create a perfectly level top line. Ensure the bottom remains as close to the ground as possible to prevent animals from crawling underneath.
What should I do at the bottom of the fence to prevent digging? For predators or digging animals like dogs or foxes, create an “apron.” This involves bending the bottom 12-18 inches of the mesh outward at a 90-degree angle and burying it shallowly, or securing it flat to the ground with landscape staples. This deters animals from digging directly at the fence line.
Can I install a wire mesh fence by myself? While possible for short runs, having at least one helper is highly recommended, especially for unrolling, lifting, and tensioning the heavy mesh. For long fences, a team makes the process safer, faster, and ensures a better-quality result.
How do I maintain my wire mesh fence? Perform a seasonal inspection, looking for loose staples, sagging sections, rust spots, or damage from fallen branches. Re-tension loose sections promptly and repair any holes with patches of matching mesh. Keeping vegetation trimmed back from the fence line reduces moisture retention and physical damage.
Is wire mesh safe for all animals? Generally, yes, but considerations are needed. For small animals like chickens, ensure the mesh openings are small enough to prevent head entrapment. For horned animals like goats, a smooth-wire top strand or electric wire is better than mesh to prevent horns from getting caught. Always choose a mesh gauge and style appropriate for the size and behavior of your livestock.
What are the most important tools I need to get started on this project?
You’ll need a core set of tools to build your fence efficiently and safely. Essential items include post hole diggers or an auger for setting your posts, a sturdy hammer or post driver, heavy-duty wire cutters, and a pair of fencing pliers for twisting and cutting wire. A come-along or a dedicated fence stretcher is absolutely crucial for pulling the wire mesh tight before you secure it. Don’t forget safety gear like strong gloves and protective goggles to handle the sharp wire ends.
How deep and how far apart should my fence posts be placed?
Setting your posts correctly is the foundation of a long-lasting fence. For your line posts, a good rule is to bury at least one-third of their length, aiming for a minimum depth of 2 feet. Your corner posts and gate posts carry all the tension, so they need to be set much deeper, about half their length or around 3.5 feet down. You should space your line posts about 8 to 12 feet apart along your fence line for optimal support.
What’s the best way to attach the wire mesh and make it tight?
Start by unrolling the mesh along your fence line and loosely attaching it to your starting post. The key is to use a tool like a come-along attached to the far end to pull the entire section taut before you permanently secure it. Attach the mesh to wooden posts using galvanized fencing staples, but don’t hammer them all the way in so the wire can move slightly. For metal T-posts, use the manufactured clips or heavy-duty zip ties, making sure each connection is snug.
How do I handle a fence line that goes over uneven or sloped ground?
The best approach is to follow the natural contour of the land rather than trying to keep the top of the fence perfectly level. Let the mesh roll over the hills and dip into the valleys, which creates a more effective barrier. The critical part is to ensure the bottom of the mesh stays in continuous contact with the ground to prevent animals from sneaking underneath, which might mean burying or staking an apron in certain spots.
What type of wire mesh should I buy for containing small animals like chickens?
You need a mesh with very small openings to protect poultry from predators like raccoons and weasels. Look for a welded or woven mesh with openings of 1 inch or less, often called hardware cloth or aviary netting. A 19-gauge or thicker wire is suitable for this purpose, and a galvanized coating will help it resist rust from weather and moisture in the coop area, giving you a much longer service life.
