A snake fence, also known as an exclusion barrier, is a physical structure designed to prevent snakes from entering a defined area, such as a yard or garden. This barrier uses specific materials and techniques to account for a snake’s ability to slither through tight spaces and its tendency to follow barriers. Unlike typical fencing, a snake fence focuses purely on creating a seal against the ground and a smooth vertical surface to ensure the safety of people and pets. The system’s effectiveness relies entirely on the precision of the installation process.
Selecting the Right Materials and Design
The success of a snake exclusion barrier hinges on using materials with a very small aperture size. The mesh openings must be no larger than one-quarter inch (1/4″) because juvenile snakes can easily pass through larger openings. Galvanized steel hardware cloth is the most durable material for this purpose, offering both strength and corrosion resistance.
The vertical height of the fence must be a minimum of 36 inches above the ground to deter climbing. Snakes are not proficient climbers on smooth vertical surfaces. For areas with larger snake species, a 42-inch height may offer better protection.
A defining feature of this design is the underground barrier, often called the “L-footer” or buried flare. This element involves bending the bottom section of the mesh outward at a 90-degree angle, away from the protected area. This horizontal extension, which should be 6 to 12 inches wide, prevents snakes from burrowing directly underneath the vertical barrier.
Preparing the Ground and Setting Support Posts
Before construction begins, the entire fence line must be cleared of debris, rocks, and vegetation. Clutter along the perimeter can create ramps or hiding spots, compromising the fence’s integrity. The fence line should then be accurately marked to ensure a straight installation path.
The next step involves digging a trench along the marked line to accommodate the underground barrier. This trench must be deep enough to bury the vertical mesh and wide enough to lay the L-footer flat. A typical trench depth ranges from 4 to 12 inches to ensure the mesh extends sufficiently below the surface.
Support posts, such as metal T-posts or treated wood posts, are set securely along the trench line, usually spaced about every 10 feet. Closer spacing may be necessary for maintaining the mesh’s tautness over long runs or uneven terrain. Setting the posts firmly before attaching the mesh creates a stable framework that can withstand tension and environmental pressures.
Attaching the Mesh and Creating the Underground Barrier
The hardware cloth is secured to the support posts, typically on the outside of the protected area, using tie wires, staples, or specialized fence fasteners. Attaching the mesh to the exterior surface denies snakes a foothold on the posts. The mesh must be stretched tightly between the posts to prevent slack or bulging that could create gaps or climbing opportunities.
The critical step is forming and placing the L-footer into the prepared trench. The bottom 6 to 12 inches of the mesh is bent outward at a 90-degree angle so it extends horizontally away from the protected area. This bent section is laid flat into the trench, creating a flat plane of wire under the soil.
The trench is backfilled with soil, which is firmly tamped down over the L-footer. This anchors the mesh and establishes the horizontal barrier, making it nearly impossible for a snake to burrow directly beneath the fence line. A snake attempting to tunnel down will encounter the buried mesh and be forced to move away.
Any necessary gates or access points require specific attention to maintain the exclusion barrier. Gates must be constructed with the same 1/4-inch mesh and designed to seal tightly against the ground and surrounding posts. Utilizing self-closing hinges and latches is recommended to ensure the barrier is never inadvertently left open.
Ongoing Inspection and Maintenance
Once installed, the snake fence requires routine inspection to maintain its effectiveness. Property owners should regularly check the entire length of the barrier for any signs of damage, such as bent mesh, tears, or rust. Promptly repairing any gaps or holes is necessary, as even a small opening can provide an entry point for snakes.
The fence line must be kept clear of debris and vegetation, particularly vines, shrubs, and leaf litter. Plant material growing against the fence can create a natural ramp, allowing snakes to bypass the vertical barrier. Clearing this buildup prevents hiding spots and ensures the mesh remains exposed and smooth.
The buried section of the L-footer should also be checked periodically for signs of soil erosion or disruption. Heavy rain or animal activity can sometimes expose the buried flare, requiring backfilling with soil to reestablish the secure underground seal. Maintaining the integrity of the ground-level seal is paramount to the fence’s long-term success.