Bird exclusion netting is a physical barrier that blocks pest birds from accessing specific areas of a building, structure, or crop. It’s the most effective long-term bird deterrent available, working against every species without chemicals or noise devices. Choosing the right netting comes down to three decisions: mesh size for your target bird, material suited to your environment, and hardware matched to your mounting surface.
Mesh Size by Target Species
The mesh opening determines which birds the net keeps out. Pick a mesh too large and smaller species slip right through.
- 3/4-inch mesh: The most versatile option. It blocks all bird species, from sparrows up to seagulls. If you’re dealing with small birds or aren’t sure which species are causing problems, this is the safest choice.
- 1-1/8-inch mesh: A mid-range option that excludes starlings, pigeons, and anything larger. Sparrows and similarly small birds can still pass through.
- 2-inch mesh: The largest standard size. It stops pigeons, seagulls, hawks, and other large birds but allows sparrows and starlings through freely.
If pigeons are your only concern, the 2-inch mesh works well and offers better airflow and visibility. For mixed-species problems, or if you simply want a set-it-and-forget-it solution, go with 3/4-inch mesh. The smaller openings also prevent debris buildup better in some configurations, since leaves and twigs are less likely to get caught partway through.
Netting Materials and Lifespan
Most bird exclusion netting is made from either polyethylene or nylon, treated with UV stabilizers and anti-aging additives during manufacturing. Both materials offer high tensile strength, water resistance, and corrosion resistance. Polyethylene is the more common choice for outdoor installations because it handles prolonged sun exposure well and tends to cost less. Nylon is slightly stronger under tension but can absorb moisture over time, which makes it less ideal for very wet climates.
Quality polyethylene netting with proper UV treatment typically lasts 10 years or more in outdoor conditions. Cheaper netting without UV stabilization can degrade in as little as one to two seasons, becoming brittle and tearing under wind loads. Black netting blends in best against most building facades, while white or translucent options are less visible against light-colored surfaces or open sky. For agricultural applications over crops, translucent netting allows more light through without sacrificing durability.
Hardware and Mounting Systems
The netting itself is only as good as the framework holding it. A proper installation uses a perimeter cable (called straining wire) tensioned around the area you want to protect, with the netting attached to that cable. The cable keeps everything taut so the net doesn’t sag, collect water, or create pockets where birds can roost on top.
Perimeter Cable
Two cable sizes cover most jobs. Use 3/32-inch (2.38 mm) cable for runs over 50 feet, and 1/16-inch (1.59 mm) cable for anything shorter. In most environments, galvanized steel cable works fine. Near saltwater, chemical plants, or other corrosive settings, upgrade to 316-grade stainless steel cable to prevent rust and eventual failure.
Corner Attachments
Corners carry the most tension in any netting system. If the corner anchors fail, the entire installation can collapse. The right anchor depends on what you’re attaching to:
- Net bolts: Heavy-duty expansion bolts for masonry, concrete, or stone. Standard net bolts handle cable runs over 20 feet. Mini net bolts work for shorter runs under 20 feet.
- Eye bolts with nuts: Designed for steel I-beams or other thick metal structures where you can drill through and bolt from both sides.
- Screw eyes: The go-to for wood surfaces. Use large screw eyes for runs over 20 feet and small screw eyes for shorter spans.
Match the metal of your anchors to the metal of your cable. Galvanized bolts pair with galvanized cable and aluminum ferrules (the small sleeves that crimp the cable ends). Stainless steel bolts pair with stainless steel cable and copper ferrules. Mixing metals causes galvanic corrosion, which weakens joints over time.
Turnbuckles and Tensioning
Turnbuckles are threaded fittings spliced into the perimeter cable that let you tighten or loosen tension after installation. They’re essential because cable stretches slightly under load and through temperature changes. Without turnbuckles, your netting will eventually sag. Place them along the cable run so you can re-tension seasonally or after storms. Again, match the turnbuckle material to the rest of your hardware: galvanized with galvanized, stainless with stainless.
Planning the Installation Layout
Before ordering materials, measure the full perimeter and area you need to cover. Add 5 to 10 percent to your netting dimensions for overlap and attachment allowance. Identify every corner, since each one needs an anchor point. For large areas, you may also need intermediate attachment points along straight runs to prevent the cable from bowing inward under the weight of the net.
Think about access before you seal everything up. If the netted area covers rooftop HVAC equipment, plumbing vents, or anything else that needs periodic service, install zipper access panels in the netting. These are reinforced openings with heavy-duty zippers sewn into the net fabric. Without them, maintenance crews will cut the netting to reach equipment, leaving gaps that birds exploit immediately. A single cut that goes unrepaired can compromise the entire system.
For buildings, netting is commonly installed under eaves, across loading docks, inside warehouses, around rooftop equipment, and under canopies or parking structures. For agriculture, it’s draped over vineyard rows, berry bushes, or orchard trees using a support frame of posts and overhead wires.
Inspection and Ongoing Maintenance
Bird netting requires less maintenance than active deterrent systems like sound devices or gel repellents, but it’s not zero maintenance. Loose netting, degraded fixings, and small gaps are the three most common failure points. Even a gap of a few inches is enough for pigeons to find their way in, and once birds are inside the netted area, they’re effectively trapped and the problem gets worse quickly.
Inspect the full installation at least twice a year, ideally in spring and fall. Look for tears caused by wind, fallen branches, or UV degradation. Check that all cable connections are still tight and that turnbuckles haven’t loosened. Pay close attention to corners and edges, where tension is highest and wear shows up first. After major storms, do a walk-through even if it’s not on schedule.
Small tears can be patched with netting repair clips or by lacing a piece of matching netting over the damaged area with UV-resistant cable ties. For larger damage, you may need to replace an entire panel. Keep spare netting material on hand so repairs happen immediately rather than waiting on an order while birds move back in.
DIY vs. Professional Installation
Small, accessible areas like garden beds, balconies, or single-story eaves are reasonable DIY projects. The tools are straightforward: a drill, the appropriate masonry or wood bits for your anchors, a crimp tool for ferrules, and a ladder. Most netting suppliers sell complete hardware kits matched to specific netting sizes.
For multi-story buildings, large commercial structures, or any installation that requires working at height, professional installation is worth the cost. Improper tensioning is the most common DIY mistake. If the cable isn’t tight enough, the net sags and creates perching surfaces. If it’s too tight, the net stretches and tears at attachment points. Professionals also know how to handle irregular shapes, internal columns, and the transitions between different building materials that make real-world installations more complex than they look from the ground.
Professional installations for commercial buildings typically include a warranty covering both materials and workmanship. This matters because a failure in year three that lets birds into a food processing facility or warehouse can cost far more than the original installation.