Glass Collisions

Products & Solutions Database

100 Eleventh Ave., NY, USA ©Christine Sheppard

Search Criteria

Are you a building professional or interested in home windows?

Are you working on new construction/replacing windows or retrofitting existing glass?

Are you working on new construction/replacing windows or retrofitting existing glass?

Company

Product Type

Deterrent/Marker Type

Surface 1 (On the Outside of the Glass)?

Threat Factor

Database Overview

No product can be guaranteed to stop all collisions in real world conditions. Glass can vary in appearance from one façade of a building to another or with time of day, depending on solar angle, reflected environment and other factors. The Threat Factor number is determined under standard conditions and does not capture that variety. Instead, Threat Factor is a relative index, and products with lower TFs are considered more effective at preventing collisions. A TF of 30 suggests that collisions will be reduced by at least 50 percent and is ABC's upper threshold for recommending a product. Products with UV patterns should be considered carefully for some applications: Materials with ultra-violet patterns will vary in effectiveness with the amount of UV light present. This means that when the UV index is low – under low light conditions in early morning or evening or if the glass is shaded, or when it is overcast – UV patterns will be less visible to birds. In addition, not all types of birds can see UV. For example, songbirds can see UV, raptors and pigeons cannot. Because Threat Factors can be effected by low-e coatings, published Threat Factors apply only to the glass assembly tested.

Product Listing

Glass: stained

Any Stained Glass

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Prescriptive rating

Marker Type: Low Reflection

Stained glass in general is very bird-friendly, as well as serving purposes of devotion or decoration. There is even photovoltaic stained glass! However, if a stained glass panel is insulated, by mounting an external ‘storm window’, it is important to make sure that reflections from that panel of glass don’t cause collisions.

Evaluation Type: prescriptive

Bird's Eye View

Artscape Inc.

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Intended for application to the inside of windows, non-adhesive, easy to apply, 2x2" spacing recommended. Field tested by Dr. Daniel Klem, on uncoated window glass glass: results may be different on glass with coatings.

Marker Type: Decal
Product Line: Bird's Eye View

These decals, intended to be applied to the inside of the glass, have only been tested on ordinary window glass and may be less effective on windows with reflective coatings. 2x2" spacing is recommended.

Decals: bird silhouettes

Wandkings

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Place decals using 2"x2" spacing guidelines

Marker Type: Decal
Product Line: Bird and Window Protection Stickers

Decals applied to the outside of the glass can be very effective, if applied with 2x2" spacing. Apply to the exterior side of the glass, first cleaning the surface. Many commercial window cleaners leave a residue that can interfere with adherence. We recommend using a 50% water/50% rubbing alcohol solution. Make sure the glass surface is completely dry before installation.

Color: Black

Paint: Tempera

Any

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Use non-toxic paint to put up pattern or picture using 2x2" spacing guidelines

Marker Type: Paint Pattern

Tempera is a quick, inexpensive solution for collisions. It can be applied casually, or with a stencil , to the outside of the glass. You could create different patterns for every holiday. Patterns last a surprisingly long time, even after rain, but can be removed almost instantly.

Color: Any

Paint: Acrylic

Any

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Use non-toxic paint to put up pattern or picture using 2x2" spacing guidelines

Marker Type: Paint Pattern

Paint of all types can provide inexpensive, long lasting and highly effective solutions for glass collisions. Plan carefully for acrylic or oil paint, as they may be difficult to remove.

Color: Any

Paint: Oil-based Pen

Any

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Image drawn on outside of window, using oil-based pen

Marker Type: Paint Pattern

Painted images can be excellent collision deterrents but must follow guidelines for spacing and other pattern elements to be effective. The pattern shown here meets basic spacing criteria and monitoring at the University has shown it to be successful at reducing collisions.

WindowAlert Decals (multiple styles)

WindowAlert

Threat Factor: Variable. Effectiveness depends on visibility and spacing of visual markers.

Recommend installation with 2" x 2" spacing

Marker Type: Decal
Product Line: WindowAlert
Color: frosted + UV
Evaluation Type: Powdermill tunnel

Insect Screen, external

Any Insect Screen

Threat Factor: 1

Prescriptive evaluation; reflection test

Marker Type: Physical Screen

External insect screens eliminate problem reflections and reduce impact if a bird does hit a window. Screens should cover the entire glass area of a window and should be mounted at least one inch away from the exterior surface of the glass.

Evaluation Type: reflection test

Masonry

Threat Factor: 1

Prescriptive; reflection test

Marker Type: No Reflection

Stucco, concrete, brick and stone with a matte finish should be safe for birds in any application.

Color: any

Solar Siding

Mitrex

Threat Factor: 1
Marker Type: No Reflection
Product Line: Solar Siding
Evaluation Type: prescriptive