A rule of thumb.
- UV light 40%
- Visible Light 25%
- Heat 25%
- Misc 10% **
** Miscellaneous – Indoor artificial lighting, humidity, and poor dye anchorage.
Window Films Do Not Stop Fading, They Help Reduce Fading
Will Window Film Kill My House Plants?
In most cases if a house plant is already receiving adequate light the use of window film will not harm it. New growth or flowering may be retarded and, for a few days, a plant may go into a state of shock while it adjusts to the light change. If a particular plant normally wilts by the end of a sunny day, it will actually thrive better with film installed. Although there are soem obvious guidelines in determining what, if any, effect windo film will have on a plant (for instance, dark green plants need less light than lighter colored ones), there is one sample test which can be done prior to film installation; that is, merely move the plant to an area with less sunlight for a few days. In addition, most nuseries or local agriculture agencies can advise you whether a particular plant needs closer to maximal or minimal light.
Can Window Film Be Used On Low E Windows?
Whether Window Film should be used on low E windows and how much you will benefit depends on three factors.
- Type of low E surface used on glass
- Location of Low E surface in the window system
- The desired amount of heat gain reduction, heat loss reduction, or other film benefits.
There are two basic types of low E surfaces on glass. One of these is a conductive coating put on glass as it is being made. It gives some heat loss reduction, but does little to recuce heat gain into a building. The second type is a more comlex system of multiple layers of metals and conductive coatings deposited on glass after it has been made. This type of low E glass gives heat reductions of 30% to 50% in addition to reducing heat loss. Obviously there will be more heat gain reduction using film on the firts type. If there is any question about the type you may have, ask your glass company or the window manufacturer to send you specific information about your glass.
The location of the low E surface in your window system is also very important in deciding whether film should be used. If the low E coating is on the room-side surface of the innermost pane of glass, the use of window film may reduce or eliminate the heat loss reduction of the glass itself. This may be more than offset by the heat gain reduction/heat loss reduction properties of the films to be used. Most low E window systems, however, consist of double pane windows where the low E surface faces the air space between the panes. In this case, film can be installed without eliminating the heat loss reduction benefit of the low E glass.
The type of window film you choose for low E glass depends entirely on your desired benefit – whether you want to reduce heat gain, control glare, prevent heat loss, reduce fading or enhance the safety of your windows and glass doors. Make sure you consider all these benefits before making a final decision.
Will Window Film Really Stop Fading Of Fabrics?
There are six factors affecting fabric fading:
1. Ultraviolet Light
2. Visible Light
3. Heat and Humidity
4. Chemical Vapors (including ozone)
5. Age of Fabric
6. Dye Fastness
Clear single pane glass (1/8″ to 1/4″) will reject 23-28% of the ultraviolet light from the sun. Insulated glass is slightly better, rejecting 36-41%. Window films installed on glass reject 95-99% of solar ultraviolet light.
Different types of clear glass and window systems will reject 13- 29% of the solar heat. With window films, 80% solar heat rejection can be obtained.
No window film can eliminate fading. It can, however, offer maximum protection from fading due to solar ultraviolet light and solar heat.