What can window film do for me?

– Reject up to 80% of solar energy

– Reject 99.9% of ultraviolet radiation

– Reduce the fading of furniture, window treatments, wooden floors, and carpeting

– Provide energy savings by lessening the need for heating and cooling

– Provide safety and security by holding shattered glass in place


– Provide a uniform appearance across all windows

– Improve outward visibility by reducing glare from the sun

– Increase comfort by eliminating hot spots near windows

– Increase privacy

What is visible light transmittance?

Below are a few definitions of common window film terminology:

Visible Light Transmittance – this is the percentage of light that is allowed to pass through the film. The lower the number, the darker the film.

Total Solar Transmittance- the percentage of incident solar radiation that passes through the film

Total Solar Reflectance: the percentage of incident solar radiation reflected by the film

Total Solar Absorption: the percentage of incident solar radiation to be absorbed by the film

Visible Light Transmittance: the percentage of total visible light to be passed through the film.

Visible Light Reflectance: the percentage of total visible light to be reflected by a window system that can be seen visually.

Percent Ultraviolet Transmittance: percentage of total ultraviolet light to be passed through the film

Percent of Total Solar Energy Rejected: the percentage of incident solar energy rejected by the film, equals solar reflectance plus the part of solar absorption which is reradiated outward.

How does window film work?

Most window films are applied to the inside of a window. As sunlight hits the window some of its energy is reflected, some is absorbed by the glass, some is transmitted through the film and into the room, and some is absorbed by the window film and reradiated in and out of the room. In the winter, window film helps to reflect radiant heat back into your home and saves energy by reducing heat loss.

How does window film stick to the glass?

Window films contain a pressure sensitive adhesive between the film and the liner, when the liner is removed and the film is installed using a mounting solution, the excess solution is pushed out from beneath the film causing the adhesive to activate.

Is window film scratch resistant?

Window films contain a scratch resistant coating on the exterior surface intended to protect from average amounts of wear and tear brought about by human error and environmental factors. Although films are somewhat scratch resistant they are not at all completely scratch proof and care should always be taken when cleaning windows or handling items near them.

How long will it take for my window film to dry?

The drying period for window film heavily depends on the climate and season where the building is located. The amount of drying time is inversely correlated to the ambient temperature and amount of sunlight. The hotter and brighter the area, the less time it will take to dry and vice-versa. Slow drying is not a major concern as the trapped moisture will always end up completely drying out. Thicker films such as security film will have longer drying periods that can range from a days to months depending on the environment.

During the drying process you may notice haziness or small water puddles trapped in the vapor barrier that lies between the film and the glass, these will dissipate over time as the film cures. During installation the installer should remove as much moisture as possible to lessen the amount left behind to dry. If you notice any moisture in the vapor barrier please do not attempt to pierce the film and drain it, as this damage will not be covered by installer or manufacturer warranties.

Why should I consider security film for my home or business?

Many unforeseen circumstances can cause glass to break resulting in a large amount of sharp projectiles that can injure, maim, or even kill anyone in their path. This can result from a smash and grab burglary, a child falling into a patio door, furniture falling on a window, natural forces such as an earthquake, or a projectile from the outside. Potential users of security film include homeowners who live near golf courses, store owners with merchandise in a display window, or anyone concerned about safety and security from falling or flying glass shards.

Will window film affect the growth of indoor plants?

In general, the application of window film should have no effect on plant growth. Initially a plant placed near a window may experience slower growth or flowering as it adjusts to the new light level. If a plant near a window has experienced wilting as a result of overexposure , the installation of window film can actually help it thrive. If plant growth is a major concern, the plant can always be moved to an area with lower light before the installation to simulate the new environment beforehand to eliminate any concern.

How long will window film last?

The lifespan of window film depends on several factors including the type of film, the type of glass it is applied to, and the construction of the windows. Most films designed for residential and commercial use have a manufacturer’s warranty of 10 years. Due to the wide variety of films you should consult with your installer about the warranty for the specific film you select.

Can window film be applied over decals on glass?

In most circumstances any stickers or decals on a glass surface need to be removed prior to film installation as they can prevent full adhesion between the glass and the film. The film/decal bond will be weaker than the film/glass bond and this disparity can decrease the life and quality of the application. If burglar tape or alarm contacts are on a window these should be removed by the security company, not the film installer, and then later reapplied.

At what point during building construction should window film be applied?

If a building is currently under construction it generally stands that the window film should not be applied until all other work has been completed because many parts of the construction process could be detrimental to the film installation. Paint could get on the film, dust and fibers could lead to contamination between the film and the glass, and other potential damage could happen due to the large amount of activity. The best time to have film installed is after the building is completed and before the furniture and window treatments have been placed but that is rarely the case, film can always be applied in a fully furnished building.

Should window film be applied to plexiglass or plastic windows?

No, window film should not be applied to plexiglass or plastic windows. Acrylic and polycarbonate are plastic sheeting products that have the potential to outgas. Heat and visible light from the sun causes outgassingĀ. Outgassing is the release of chemical components and/or moisture absorbed by the plastic. The outgassing interferes with the window film’s adhesive system, and results in bubbling between the plastic window and the film. Also many adhesives that can be removed from glass will cause a permanent bond to plastic, meaning the film could end up being impossible to remove without damaging the window.

Can window film be applied to wired glass windows?

Solar control window films should not be applied to wired windows that receive any amount of direct sunlight. The film can trap heat inside the window causing the wires to expand at a high rate resulting in spontaneous glass breakage. If the wired glass is an interior window that receives no sunlight, then it can potentially be tinted.

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