You can make effective bird spikes at home using a few inexpensive materials, most of which you may already have. The two most common DIY methods use either galvanized wire fencing cut into strips or nails driven through wood. Both cost a fraction of commercial spikes, which typically run $2 to $6 per linear foot, and work on the same principle: creating an uneven surface that birds can’t comfortably land on.
Choosing Your Materials
The material you pick determines how long your spikes last and how much effort goes into building them. Here are the three most practical approaches.
Galvanized wire fencing: A roll of 16-gauge, 2-by-3-inch galvanized fencing is the most popular choice. Vinyl-coated galvanized steel works well, but the key requirement is rust resistance. When you cut the fencing, you’ll expose bare metal at every cut, so even coated material needs to be galvanized or stainless steel underneath. A single roll covers a lot of linear footage for just a few dollars.
Nails and wood strips: This is the simplest method. You drive nails through a thin strip of wood (a 1-by-2 or similar scrap lumber) so the points stick up. It requires almost no specialized materials and works well for short ledges, windowsills, or fence tops. The downside is that wood eventually weathers and rots outdoors unless you seal or paint it.
Zip ties: For small areas like the top of a pole, pipe, or railing, heavy-duty zip ties work surprisingly well. You secure one or two zip ties around the circumference of the object, then thread additional zip ties vertically so they point upward. This method is fast, cheap, and easy to remove later.
How to Build Wire Fencing Spikes
Start by cutting the galvanized fencing into long strips, one row of cells wide. Use wire cutters or tin snips. Each strip will have a series of short horizontal crossbars with protruding wire ends where you made your cuts. Bend those protruding ends upward at roughly 45-degree angles so they fan outward. This creates a row of V-shaped or angled points along the length of the strip.
The base of the strip lies flat against whatever surface you’re mounting it on, while the bent wires point up and outward to prevent birds from finding a foothold. You don’t need the points to be razor-sharp. The goal is to make the surface uncomfortable and unstable for landing, not to injure the bird. Blunt or slightly rounded tips are fine and actually preferable from both a safety and legal standpoint.
How to Build Nail-and-Wood Spikes
Cut a strip of wood to match the length of the ledge or surface you’re protecting. A piece about 1 to 2 inches wide and at least half an inch thick works well. Drive nails through from the bottom so the points face upward. Space them about 1 to 2 inches apart in a zigzag pattern so there’s no gap wide enough for a bird to stand between them. For wider ledges, you can use a wider board and add a second or third row of nails.
Use galvanized or stainless steel nails so they don’t rust. Standard 2-inch nails give you enough height above the wood surface to deter pigeons and similar medium-sized birds. If you’re dealing with smaller birds like sparrows, shorter nails with tighter spacing will be more effective.
Spike Spacing and Coverage
The most common mistake with DIY bird spikes is spacing them too far apart. Birds are surprisingly good at finding small flat spots to perch. Commercial spike systems use a simple rule: for every 5 inches of ledge width, you need one row of spikes. Spikes in each row alternate between wider projections (about 4.5 inches of spread) and narrower ones (about 2.5 inches of spread), which eliminates gaps.
For your DIY version, make sure the tips of your spikes extend at least half an inch past the exposed edge of the ledge. If a bird can land on the outer lip of the surface without touching any spike, the whole system fails. On ledges wider than 5 or 6 inches, plan on installing two parallel rows. For surfaces 7 inches or wider, you’ll need rows with wider-angled spikes or a third row to cover the full width.
Mounting and Adhesive Options
How you attach your spikes depends on the surface. For wood surfaces like fence rails or eaves, screwing or nailing the base strip directly into the wood is the most secure option. Pre-drill holes if you’re working with a thin base strip to avoid splitting it.
For concrete, brick, metal, or other hard surfaces, construction adhesive is the standard approach. Look for an outdoor-rated, all-weather adhesive that bonds to concrete, metal, and masonry. The best options are formulated to handle temperature swings from well below freezing to extreme heat, so they won’t soften in summer or crack in winter. Clean the surface thoroughly before applying. Dust, bird droppings, or loose paint will weaken the bond. Apply a generous bead of adhesive along the full length of the base, press it firmly into place, and allow it to cure for 24 hours before expecting it to hold against wind or bird activity.
For temporary installations or surfaces you don’t want to damage, some people use cable ties or hose clamps to strap spike strips onto pipes and railings.
Keeping Spikes Legal and Humane
Bird spikes are legal in most of the United States and many other countries, as long as they don’t harm the birds. The Migratory Bird Treaty Act protects over 1,000 species of wild birds, making it illegal to harm, kill, or disturb nesting native migratory birds without a permit. Properly designed spikes don’t violate this law because they simply discourage landing without trapping or injuring anything.
To stay on the right side of both the law and basic decency, keep a few things in mind. Don’t sharpen your spike tips to a dangerous point. The spikes should be uncomfortable to stand on, not capable of piercing skin or feathers. Avoid placing pointed metal spikes where they face sidewalks or areas where people, children, or pets could come into contact with them. If you live in a neighborhood with a homeowners association, check your community’s appearance standards before installing anything visible. Metal spikes on a front-facing ledge could trigger a violation. Gray or black plastic zip ties, or painted wood strips, tend to blend in better than shiny bare metal.
Durability and Maintenance
Stainless steel and galvanized wire spikes can last over a decade outdoors with minimal maintenance. Check them once or twice a year to make sure the adhesive is holding and no sections have come loose. Birds will sometimes drop nesting material on top of spikes, effectively building a platform over them, so clear away any debris you notice.
Wood-based spikes have a shorter lifespan. Untreated wood exposed to rain and sun will start degrading within a year or two. Applying an exterior wood sealant or using pressure-treated lumber extends this considerably. Zip tie spikes are the least durable option. UV exposure makes standard zip ties brittle over time, so use UV-resistant ties if you can find them, and plan on replacing them every year or so.
The total cost of a DIY setup is typically under $20 for enough material to cover 10 to 20 feet of ledge, compared to $20 to $120 for the same coverage with commercial products. The tradeoff is time and aesthetics. Commercial spikes look cleaner and install faster, but homemade versions work just as well at keeping birds off your ledges, signs, and railings.