Birdwire is a spring-tensioned wire system designed to create an unstable landing area that is widely used throughout the US because it is very low-profile.
Where to Use:Long, exposed ledges, parapets, signs, beams, pipes etc.
Target Bird:Pigeon and larger
Bird Pressure:Light - Medium
Material:Stainless steel and nylon coated wire
Installation:Wire is attached to stainless steel posts and tensioned using springs
Expertise Level:Involved

Birdwire® Information

250, 500, 1,000 ft.

Mounting Hardware

Birdwire is a spring-tensioned wire system designed to create an unstable landing area that is widely used throughout the US because it is very low-profile. It carries GSA approval for historic buildings.

Birdwire is Very Discreet

The Birdwire system is one of the least visible of all ledge products, and is frequently used on high-visibility ledges where aesthetics are important.

How Birdwire Works

Nylon-coated, spring-tensioned stainless steel wire is attached to stainless steel posts at differing heights and intervals. The posts are secured to masonry using nylon anchor rivets (requires drilling into the surface) or glue-on bases.

Birdwire offers a Variety of Options

The posts are available in various sizes and many different brackets and clamps allow installation on otherwise hard-to-protect surfaces like sprinkler pipes, rain gutters and I-beams. Stainless steel split pins can be used to install the system inside window reveals.

Birdwire is Totally Humane

Harmless to birds or humans alike.

Installation Instructions

Birdwire is one of the most discreet ledge products available. It effectively protects light to medium pressure exposed ledges from pigeons and larger birds. It does not work on recessed ledges or in nesting or roosting areas unless it is electrified (BirdFence). Because it blends so well with architecture, it is the only approved product for the federal government's historical buildings and other installations where visibility is important, like upscale museums or hotels. It can also be used to deter soaring birds from large open areas when installed in a grid pattern (Gridwire - call for more details). A Birdwire installation consists of two key elements:
  • Stainless steel posts attached to a ledge or mounting surface
  • Thin stainless steel wire springtensioned between the posts

Birdwire Post Spacing:

As the diagram indicates, the first row of posts (on the outer edge of the ledge) should be no more than 1" from the edge. The posts behind the first post should be no more than 3" apart. The gap behind the last post and the back wall can be no more than 3". Posts are mounted no more than five feet down the length of the ledge. The wire is installed in ten foot sections. A spring is installed at one end, while both ends are made into a loop with small Birdwire crimps.

As shown by the diagrams, the wires are mounted above the ledge in alternating heights: 3.5" and 5". A variety of installation options are available for different substrate materials. A space of three inches is left between the posts from front to back, and a five foot space is left between posts along the length of the ledge. Springs are installed (and the wire is terminated) every ten feet.

Best Method

Anchoring Your Posts by Drilling Holes - Concrete, Stone or Wood
Work in ten foot sections.
  1. Drill three 6.5mm holes one inch deep using a hammer drill (see post placement in the diagram on this page).
  2. Insert nylon anchor rivets into the holes.
  3. Use posts that are 4.5" and 6" long because you will hammer them in one inch, leaving you with your wires 3.5" and 5" above the ledge. Hammer the posts into the holes one inch. Face the loop of the center post in the correct direction for the wire to pass through it, and place the end posts 90 degrees to that angle, so the wire loops can terminate in the posts.

Secondary Method

Anchoring Your Posts without Drilling Holes - Using Stick-on-Bases Work in ten foot sections.
  1. Use Bird Barrier's glue-on bases (see catalog). These can be glued to most surface, or screwed in place.
  2. Use posts that are 3.5" and 5" long because you will not be hammering the posts into the ledge one inch. Insert the posts into the bases and tighten the set screw.
Important Note About Using Glue: It is critical that you test a few bases before gluing them all down. Many glues may not hold to your surface. If using Bird Barrier Bond, apply a marble-sized dab to the base, press down to the ledge, then pull the base up off the ledge for about two minutes, then re-press in place. This starts the evaporation process that is critical for the glue to dry. If you need extra-fast drying, use Bird Barrier Super Bond (see the catalog).

Bond Usage

10.2 oz cartridge = 125 bases, 3.75 oz tube = 50.

Attaching the Birdwire to the Posts

  1. Attach the wire to one end post first. To do this, thread the wire through a Birdwire Crimp, through the loop in the post, and back through the crimp. Slide the crimp into the slot in the crimping tool and squeeze very hard. Trim the excess wire with the crimping tool.
  2. Thread the wire through the center post.
  3. Attach a spring to the post at the other end of the ten foot section.
  4. Attach the wire to the spring using the same Crimp technique described in #1. Be sure to pull the wire tight before crimping the wire in place.

Installation Time

About 35 minutes for 25' (two rows).

Download a PDF  Download the Installation Instructions

Architectural Specifications

Bird Barrier America, Inc.
20925 Chico Street
Carson, CA 90746
Phone (310) 527-8000,
(800) 503-5444
Fax: (310) 527-8005

CSI Division: 10296
Bird Barrier Birdwire


Bird Barrier America, Inc. manufactures Birdwire's extensive line of components from the finest stainless steel and ultra-violet stabilized plastics.

PR-Product Presentation

Bird Barriers's Birdwire system is used worldwide to deter pigeons and larger birds from roosting on exposed building ledges, parapets, window sills, pipes and roof peaks. The system features hard-to-see ultra violet protected, nylon coated stainless steel wire spring-tensioned between stainless steel posts.

Very Discreet
The advantages of Birdwire include its wide array of installation options, and the fact that it is extremely hard to see, even close up. It is the clear choice for high pedestrian, high-end structures like historic buildings, hotels, museums, shopping centers and residences.

Many Options and Configurations
Birdwire posts are available in various lengths and configurations, allowing for installation on literally any building situation. Special clamps allow for installation on pipes, rain gutters, skylights, roof peaks, narrow ledges, corners and literally any surface where pest birds are posing a problem. Stainless steel split pins can replace posts on window ledges where opposing walls face one another.

UA-Uses, Applications

Bird Barrier Birdwire can be used to deter a wide variety of birds (pigeons and larger) from landing on light to medium pressure (see "Bird Pressure" in company introduction) exposed ledges. The tensioned wires de-stabilize the landing platform, causing the birds to take their business elsewhere. The Birdwire components can be used in combination to cover any width ledge. Birdwire is not recommended for swallows, sparrows or starlings. Birdwire requires knowledgeable installers, as the many attachments, springs and wires make up a product line which cannot just be pulled out of the box and mounted ready-to-go onto a surface. Other Bird Barrier ledge products (The Coil and BirdPoint) are much easier to install. See their product descriptions elsewhere within Bird Barrier's product line (see other Bird Barrier screens).

AI-Assembly, Installation

Bird Barrier's Birdwire is run in long sections along the length of the ledge, pipe, gutter or other mounting surface. Bird Posts are mounted to the building by drilling in to the substrate, or by attaching stick-on bases with Bird Barrier Super Bond. The posts should be placed no more than 5 feet apart. Ledges of 1 to 2 inches wide require only one row of Birdwire. Wider ledges, however, will require a row every two and a half inches. A 9 inch ledge, for example, would require 3 rows for total protection.

MF-Materials, Finishes

All components of the Birdwire system are made from stainless steel or ultra-violet stabilized plastic. The wire itself is very thin braided stainless steel wire coated with a ultra-violet stabilized nylon coating.

TS-Technical Support

Bird Barrier's knowledgeable field representatives are available to assist in any aspect of evaluation, product recommendation and even local certified installation. Call 800-503-5444, or fax drawings and other pertinent information to 310-527-8005. Free literature, job evaluation worksheets and installation information is available.



1.1 Description
1.1.1 Install Bird Barrier Birdwire on exposed ledges where birds loaf but do not nest, to prevent loafing and damage from droppings.
1.2 Quality Assurance
1.2.1 Obtain technical literature from manufacturer or distributor, telephone consultation and plan/photograph evaluation.
1.2.2 Utilize certified installation companies in your area who are fully skilled with Bird Barrier products, and carry the proper insurance coverage.
1.2.3 Utilize labor recommended by Bird Barrier for especially challenging applications.

1.3 Submittals
1.3.1 Submit manufacturer's samples, catalog cuts, shop sketches and other descriptive material.

1.4 Product Handling
1.4.1 Protect Bird Barrier Birdwire from damage before, during and after installation.
1.4.2 If damage occurs to Bird Barrier Birdwire components, make all replacements immediately.


2.1 Acceptable Manufacturer
2.1.1 Bird Barrier America, Inc., 20925 Chico Street, Carson, CA 90746. Phone 800-503-5444, Fax 424-527-8005

2.2 Model Designation
2.2.1 Birdwire Posts
2.2.2 Birdwire mounting systems
2.2.3 Birdwire stainless steel wire
2.3.4 Birdwire crimping tool and masonry drill bits


Birdwire posts, springs, brackets, clamps
Material: 316 Stainless Steel
Height: Rods available 3.5", 4.5", 5.5", 6.5" and 8"
Birdwire: 325 ft, 975 ft, 1625 ft.

2.3 Mounting Systems
2.3.1 Concrete, stone or brick by drilling into substrate: Insert nylon anchor rivet into a hole 1" deep by 1/4". Birdwire post is hammered into this fitting.
2.3.2 Steel, sheet metal, or concrete, stone or brick with no holes in substrate: Use Birdwire stick-on bases and Bird Barrier Super Bond. Please experiment with the stick-on system before doing an entire job. The Bond is so powerful it has been known to pull up weaker substrates. Please follow Bond literature carefully.
2.3.3 Sheet metal with small holes: Use Birdwire stick-on bases and small self-tapping sheet metal screws through screw holes provided in base.


3.1 Examination
3.1.1 Examine installation area. Notify architect of detrimental work conditions.
3.1.2 Do not proceed until conditions are corrected.

3.2 Surface Preparation
3.2.1 Ledges and mounting surfaces must be clean, dry and free of peeling paint, rust, bird droppings or other debris. Bird droppings must be removed in a safe manner; large quantities should be removed and disposed of by reputable waste removal companies. 3.2.2 Remove or repair articles that may damage the Birdwire system after installation, such as tree limbs, brush, and loose parts of the building.

3.3 Installation
3.3.1 Install Birdwire as recommended in the installation instructions, which are supplied by the manufacturer. The first row of Birdwire shall nearly overhang the outer edge of the ledge. This can be accomplished by bending the outer post once it is inserted in the anchor rivet.
3.3.2 Birdwire shall cover the complete ledge, not just the outer perimeter. Birdwire shall extend to each corner. Birdwire is an anti-landing device, not a barrier. No more than 2.5" can be left between rows or wire, and no more than 5 feet can be left between posts lengthwise along the ledge.
3.3.3 Birdwire shall be installed in lengths of no more than 10' per section of wire. Every 10' there shall be a spring and termination of the wire section. The next 10' section simply continues from the same post.

3.4 Inspection
3.4.1 Visually inspect the Birdwire for loose wires or other problems related to poor installation or surface preparation.
3.4.2 Repair as necessary immediately.

OM-Operation, Maintenance

If the Birdwire is installed per our specifications, the product should be virtually maintenance free. Occasionally birds might drop debris in the wire in an attempt to build a nest, but the debris should be released by natural forces. Nest building is a characteristic of heavy-pressure sites (see introduction), and if the birds attempt to nest upon the Birdwire it was mis-specified and should be correctly specified with BirdPoint, Bird-Flite or Bird-Shock (see BirdPoint, Bird-Flite & Bird-Shock within the Bird Barrier family of products).

» More information for Architects

Download a PDF  Download the Architectural Specifications


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