Squirrel Spikes | Fence Spikes For Squirrels | Anti Squirrel Spikes

Squirrel Spikes: The Complete Guide to Fence Spikes for Squirrels and Anti Squirrel Spikes That Actually Work

Squirrels are acrobats. They leap between branches, sprint along power lines, scale vertical walls, and balance on surfaces that would defeat most other animals their size. This athletic ability is impressive to watch from a distance but deeply frustrating when the squirrel’s chosen obstacle course runs across your fence, along your wall, over your roof, and into your attic. Squirrel spikes put an end to this by creating a physical barrier on the surfaces squirrels use as highways, making it impossible for them to grip, balance, or land on the protected area.

But not all squirrel spikes are the same, and the difference between a product that genuinely deters squirrels and one that barely inconveniences them comes down to design, materials, and an understanding of how squirrels actually interact with obstacles. This guide covers how anti squirrel spikes work, which types perform best in different situations, how to install them correctly, and the critical details that determine whether your investment in fence spikes for squirrels delivers lasting protection or lasting disappointment.

How Squirrel Spikes Work

The principle behind squirrel spikes is straightforward. Squirrels need a flat, grippable surface to walk, run, or sit on. Spikes eliminate that surface by replacing it with an array of pointed protrusions that the squirrel cannot navigate comfortably. When a squirrel encounters a spiked surface, it cannot place its paws flat, cannot distribute its weight evenly, and cannot maintain the balance it needs to move forward. The animal quickly learns that the spiked area is impassable and redirects its route elsewhere.

Squirrel spikes are a deterrent, not a trap and not a weapon. The spikes are designed to be uncomfortable and unnavigable, not to injure the animal. A properly designed anti squirrel spike is blunt enough at the tip to prevent puncture injuries while being rigid and tall enough to prevent the squirrel from simply stepping between the points or flattening them under its weight. This humane approach to squirrel control is one of the reasons spikes have become the most widely recommended physical deterrent by pest control professionals and wildlife management advisors.

Why Squirrels Need a Different Spike Than Birds

This is one of the most important points in the entire squirrel spike discussion, and it is the detail that trips up more buyers than any other. Bird spikes and squirrel spikes are not the same product. Bird spikes use thin, flexible pins designed to prevent pigeons, starlings, and other birds from landing on ledges and rooflines. These pins are effective against birds because birds are light, have fragile feet, and are easily deterred by even a thin obstacle on their landing surface.

Squirrels are a completely different challenge. An adult grey squirrel weighs between 400 and 700 grams, roughly ten times the weight of a pigeon, and has powerful legs, sharp claws, and a low centre of gravity that gives it extraordinary balance. A squirrel encountering standard bird spikes can often push the thin pins aside, step between them, or simply flatten them under its body weight and walk straight across. Effective squirrel spikes use thicker, more rigid spikes on a wider base with taller profiles that create a barrier a squirrel cannot defeat through strength or agility alone. If you install bird spikes expecting them to stop squirrels, you are likely to be watching squirrels walk across them within days.

Types of Squirrel Spikes

Several different spike products are designed specifically for squirrel deterrence, each suited to different surfaces, installation scenarios, and aesthetic preferences. Understanding the main types helps you choose the right product for each area of your property.

Stainless Steel Squirrel Spikes

Stainless steel anti squirrel spikes represent the premium tier of the market. The spikes are made from rigid stainless steel rods mounted on a steel or aluminium base strip, creating a permanent, weather-proof barrier that maintains its profile and rigidity through decades of outdoor exposure. Stainless steel does not corrode, does not weaken in UV light, and does not become brittle in frost. A stainless steel spike strip installed today will still be performing exactly as intended ten or twenty years from now without any maintenance or replacement.

The rigidity of steel spikes is their greatest functional advantage. A squirrel cannot bend, flatten, or push aside a steel spike the way it might defeat a lighter plastic pin. The spikes hold their position absolutely, creating a non-negotiable barrier that even the most determined squirrel cannot overcome through brute force. For high-pressure situations where squirrels are persistent and have established regular routes across your property, stainless steel is the material that delivers certainty.

Polycarbonate Squirrel Spikes

Polycarbonate fence spikes for squirrels offer an effective deterrent in a near-invisible format. Made from clear or tinted UV-stabilised polycarbonate plastic, these spikes are difficult to see from ground level when installed on fence tops, wall caps, and roof edges. This visual discretion makes polycarbonate the preferred choice for residential properties where visible metal spikes would be aesthetically unwelcome on garden fences, boundary walls, and other structures visible from the street or from neighbouring properties.

The effectiveness of polycarbonate squirrel spikes depends heavily on the quality of the material. Premium polycarbonate with proper UV stabilisation maintains its rigidity and clarity for years of outdoor exposure. Budget polycarbonate without adequate UV treatment degrades rapidly in sunlight, turning yellow, becoming brittle, and eventually snapping under the weight of a squirrel. When the spikes break, the deterrent fails, and you are back to square one with the added frustration of removing broken spike remnants from your fence before installing replacements. Always confirm the UV rating of any polycarbonate spike product before purchasing, and treat vague claims of “UV resistant” without a specific rating or lifespan guarantee with appropriate scepticism.

Plastic Spike Mats and Panels

Spike mats are flat panels covered in an array of short, blunt spikes designed to cover wider surfaces than a single strip. They are useful for protecting flat areas such as shed roofs, wall tops, patio walls, and other horizontal surfaces where squirrels sit, rest, or use as launch points for jumping onto higher structures. The mats can be cut to size and arranged to cover irregular shapes, making them adaptable to surfaces that strip-format spikes do not fit neatly.

Spike mats are generally less effective than dedicated strip spikes on narrow surfaces like fence tops because the mat width exceeds the surface width and the excess material hangs over the edges, which can look untidy and create catching points for garden debris. For wide, flat surfaces, however, mats provide excellent area coverage and are among the most cost-effective anti squirrel spike options for large-scale protection.

Rotating or Spinning Deterrent Bars

While not technically spikes, rotating deterrent bars are often sold alongside squirrel spike products and address the same problem. These devices consist of a cylindrical bar mounted on brackets along the top of a fence or wall. When a squirrel attempts to grip the bar, it rotates under the animal’s weight, preventing the squirrel from gaining purchase and causing it to fall off. Rotating bars are effective on straight fence runs and wall tops where the continuous bar can spin freely without obstruction. They offer a smooth, minimalist appearance compared to spikes and are particularly popular on contemporary fencing where the spiky aesthetic of traditional deterrents conflicts with the design intent.

Where to Install Fence Spikes for Squirrels

Squirrels follow predictable routes between their nesting sites, food sources, and travel corridors. Identifying these routes and protecting them with spikes creates an effective barrier system that redirects squirrel traffic away from your property. Several locations are common targets for spike installation.

Fence Tops

Fence tops are the most common squirrel highway on residential properties. Squirrels use the flat top rail of timber and composite fences as a fast, elevated pathway that connects trees, sheds, garages, and the main house. Installing fence spikes for squirrels along the full length of affected fence runs blocks this pathway and forces squirrels to find an alternative route. For maximum effectiveness, cover the entire fence line rather than just the sections closest to the house, as squirrels will simply bypass short protected sections by dropping to the ground, running along it, and jumping back onto the fence beyond the spikes.

Wall Caps and Wall Tops

Garden walls, boundary walls, and retaining walls with flat caps provide the same elevated pathway that fence tops do. Squirrels use wall tops to traverse properties, access rooflines, and reach upper-story windows and soffits where they gnaw entry points into attic spaces. Anti squirrel spikes installed along wall caps block these routes and protect the roof access points that squirrels exploit. Pay particular attention to wall sections that are close to trees or adjacent structures, as these are the most likely points where squirrels transition from natural climbing routes onto your walls.

Roof Edges, Fascias, and Soffits

The junction where the roof meets the wall is the primary entry point for squirrels accessing attic spaces. Squirrels gnaw through fascia boards, soffit panels, and roofing felt to create openings that give them access to the warm, sheltered roof void. Installing squirrel spikes along the top of fascia boards and at the roof edge prevents squirrels from sitting in the position they need to gnaw their way in. The spikes deny the squirrel the stable, comfortable perch it requires to work at the building fabric, forcing it to abandon the attempt and move on.

Downpipes and Vertical Access Points

Squirrels are accomplished vertical climbers and frequently use downpipes, soil pipes, and other vertical structures as ladders to reach rooflines and upper walls. While spike strips are not suitable for vertical surfaces, cone-shaped downpipe guards and wrap-around barriers serve the same deterrent function on vertical access points. These guards create an overhanging obstacle that the squirrel cannot climb past, blocking the vertical route and complementing the horizontal protection provided by spike strips on fences, walls, and roof edges.

Bird Feeders and Garden Structures

Squirrels are notorious raiders of bird feeders, and the poles, posts, and branches that support feeders are common targets for spike or baffle installation. Spike collars around feeder poles prevent squirrels from climbing to the feeder, while spike strips on the shed roofs, pergola beams, and tree branches that squirrels use as launch points for jumping onto feeders deny them the platforms they need to reach the food. Protecting bird feeders requires a strategic approach that considers all possible access routes, not just the feeder pole itself, because squirrels will find and exploit any unprotected path to the food source.

How to Install Squirrel Spikes Correctly

Proper installation ensures your anti squirrel spikes perform effectively and remain securely in place through years of weather exposure and squirrel encounters. Incorrect installation leaves gaps that squirrels exploit, creates strips that detach from the surface, and wastes the investment in products that could have worked perfectly if fitted properly.

Surface Preparation

Clean the mounting surface thoroughly before installation. Remove moss, lichen, loose paint, dust, and debris that would prevent adhesive from bonding or create an unstable base for screwed fixings. On timber surfaces, ensure the wood is dry and free of surface moisture that would weaken adhesive bonds. On masonry, brush away loose morite and crumbling render. A clean, stable surface gives the mounting system the best possible foundation for a long-lasting installation.

Choosing the Right Mounting Method

The mounting method depends on the surface material and the type of spike strip being installed. Outdoor-grade adhesive is the most common mounting method for both stainless steel and polycarbonate spikes on smooth, non-porous surfaces such as painted timber, plastic, metal, and glazed masonry. Apply a continuous bead of adhesive along the base of the strip and press it firmly onto the prepared surface. For porous surfaces like bare brick, rough stone, and unfinished timber, mechanical fixings such as screws or masonry nails provide a more reliable attachment because adhesive may not bond consistently to an uneven, absorbent surface.

On some surfaces, a combination of adhesive and mechanical fixings provides the strongest attachment. Apply adhesive for continuous bonding along the full length of the strip and add screws at regular intervals as backup fixings that hold the strip in place even if the adhesive bond is compromised by weather or surface deterioration over time.

Eliminating Gaps in Coverage

Squirrels are intelligent problem solvers that will probe any gap in your spike coverage for a way through. When installing fence spikes for squirrels along a continuous run, butt each strip tightly against the next with no gap between sections. At corners and direction changes, cut the strip to fit the angle precisely rather than leaving an unprotected corner that a squirrel could use as a foothold. Where the protected surface meets an unprotected structure such as a tree trunk, post, or building wall, extend the spikes as close as possible to the junction to minimise the unprotected zone where a squirrel could land and bypass the barrier.

Covering the Full Width of the Surface

A common installation mistake is fitting a single narrow strip of spikes along the centre of a wide surface, leaving unprotected edges on either side that a squirrel can walk along. The spike strip should cover the full width of the surface it is protecting. On a standard fence top rail, a single row of squirrel-specific spikes usually provides adequate width coverage. On wider surfaces like wall caps and flat roof edges, two rows of spikes installed side by side may be necessary to ensure there is no walkable surface remaining on either side of the spikes.

Protecting Curved and Irregular Surfaces

Not every surface that needs protection is flat and straight. Curved wall tops, rounded fence post caps, and irregular surfaces at roof junctions require spike products that can be bent, trimmed, or arranged to follow the surface contour. Polycarbonate spike strips are generally more adaptable to curves than stainless steel because the plastic base can be gently bent to follow a radius without breaking. For very tight curves or complex shapes, cutting the strip into shorter sections and installing them sequentially around the curve produces a continuous coverage line that follows the surface accurately.

Maintaining Your Anti Squirrel Spikes

One of the greatest advantages of squirrel spikes is their minimal maintenance requirement. Unlike chemical repellents that wash away in rain, electronic deterrents that need power and battery replacement, or traps that need checking and resetting, spikes sit in position and work continuously without any input from you. A small amount of periodic attention, however, ensures they remain at peak effectiveness over the long term.

Seasonal Inspection

Check your squirrel spikes twice a year, ideally in early spring before squirrel activity peaks and in late autumn before winter weather arrives. Look for any strips that have shifted position, detached from the surface, or sustained damage from falling branches, severe weather, or ladder placement during other property maintenance. Check polycarbonate spikes for signs of UV degradation such as yellowing, cloudiness, or brittleness at the spike tips. Reattach any loose strips, replace any damaged sections, and clear any leaves, twigs, or debris that has accumulated on or between the spikes and could provide a squirrel with enough material to bridge across the barrier.

Clearing Debris Accumulation

Leaves, twigs, and windblown debris can accumulate on spike strips over time, particularly in autumn and during stormy weather. A thick layer of debris on top of the spikes creates a surface that a squirrel can walk across without the spikes penetrating through to its paws, effectively neutralising the deterrent. Clear debris from your spikes during your seasonal inspection or whenever you notice significant accumulation. A stiff brush or a blast of air from a leaf blower clears most debris quickly without disturbing the spike installation.

Monitoring for New Squirrel Routes

Squirrels are adaptable animals that will find new routes when their preferred paths are blocked. After installing spikes on the primary access points, monitor your property for signs that squirrels have established alternative routes that bypass the protected areas. Scratch marks on previously unmarked surfaces, droppings on new pathways, and fresh gnaw marks at different entry points all indicate that the squirrels have redirected rather than departed. Extending your spike coverage to these new routes as they are identified progressively closes off the options available to the squirrels until your property becomes a less attractive prospect than the alternatives available to them in the wider neighbourhood.

Common Mistakes That Reduce Spike Effectiveness

Even good-quality squirrel spikes can underperform if certain common installation and selection mistakes are made. Being aware of these pitfalls helps you avoid them and get the full deterrent value from your investment.

Using Bird Spikes Instead of Squirrel-Specific Products

As covered earlier, this is the single most common and most consequential mistake. Bird spike pins are too thin, too flexible, and too short to stop a squirrel. The animal simply bends the pins aside or steps between them. Always verify that the product you are purchasing is specifically designed and rated for squirrel deterrence, with thicker pins, wider spacing patterns, and taller profiles than standard bird spikes.

Leaving Gaps Between Strips

A gap of just 50 millimetres between two spike strips is enough for a squirrel to land a paw and use as a stepping stone to cross the barrier. Squirrels are precise and patient, and they will find and exploit even small gaps in your coverage. Butt strips together with zero clearance and fill any unavoidable gaps at corners and junctions with additional spike material or sealant-mounted individual spikes to create a truly continuous barrier.

Setting Realistic Expectations

Squirrel spikes are highly effective at preventing squirrels from using protected surfaces, but they are one component of a comprehensive approach to squirrel management rather than a standalone solution to every squirrel-related problem. Spikes block specific routes and access points. They do not repel squirrels from the general vicinity of your property, and they do not prevent squirrels from accessing unprotected areas. For complete squirrel management, combine spikes with tree branch trimming that removes aerial launch points near your roof, downpipe guards that block vertical climbing routes, sealed entry points at any existing holes in your roof or soffits, and squirrel-resistant bird feeders that remove food incentives.

When installed as part of this layered approach, anti squirrel spikes deliver exactly what they are designed to deliver: a permanent, humane, weather-proof barrier that makes your fences, walls, and roofline impassable to squirrels. Every strip you install closes another door, and with enough doors closed, the squirrels that have been treating your property as their personal playground will take their acrobatics somewhere else.

What Is A Squirrel Control Spike?

Squirrel control spikes, which are sometimes also called “anti-roosting spikes” or “roosting modifications”, are made from long, coned-shaped spikes that are used as a means of squirrel control.

These devices can be attached just about anywhere, from building ledges to commercial signage or even to street lights, and help to prevent squirrel or feral birds from landing or roosting in these areas. The unsightly and unhygienic feces produced by squirrels can be a real nuisance, not to mention the loud calls that some squirrels can make late at night.

Squirrel control spikes for Canadian roofs

Typically squirrel control spikes can be purchased by the linear metre, and work by limiting the space available for squirrel and birds to make a landing or build a nest.

Larger species of birds, like pigeons, crows, or seagulls, will more than likely simply choose to land elsewhere, but if they do attempt a landing they will only receive a light prick that will make the bird think twice about landing there again, though without doing any serious harm.

The Royal Society for the Protection of Squirrel & Birds, or the RSPB, even recommends using Squirrel control spikes as a humane method for squirrel & bird control.

Considered by many to be the most effective kind of stand-alone squirrel control, these spikes can be set up on any ledge, wall, sign, CCTV, or in rain gutters in order to keep squirrel from either landing or nesting in these places.

These squirrel control spikes are used most commonly in both city centres and coastal regions where wild birds are the most common and the most likely to cause problems for people.

Because many countries now have laws meant to prevent the needless killing of squirrels & birds, which forbids the killing of any wild birds that are not causing any serious health risk or damage to property, many people have turned to squirrel control spikes as a non-lethal way to remove squirrel & birds from their properties.

Plastic Deterrent Squirrel Control Spikes

In addition to being used to control squirrels, these spikes can also be used to prevent raccoons, opossums, and even snakes from crossing certain areas.

In these cases the spikes are meant to keep away any of the above mentioned animals in order to prevent damage and increased maintenance costs by making it more difficult for them to pass through these areas (again without causing them any serious harm).

In areas where children might come into contact with the spikes, however, it will be necessary to use smaller, blunter spikes to deter your squirrels and birds. These smaller spikes may prove ineffective against some larger birds like herring gulls.

Some types of squirrel control spikes are also electrified to make it particularly unpleasant for squirrels to come into contact with them. Unfortunately, however, these types of squirrel spikes can cause more serious harm to some birds and other animals and for this reason are illegal in some countries.

Sharp tipped bird pikes are also illegal in most countries as a result most companies manufacture spikes with blunted tips.

And believe it or not, the same kind of spikes are sometimes even used to keep out humans!

Serving as an alternative to barbed wire, strips of spikes are also sometimes used at the tops of fences to prevent people from attempting to climb over fences into off-limits or dangerous areas.