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Fiberglass is less expensive, and has the advantage of not "denting" when hit or pushed, but it is somewhat more opaque than aluminum. For this reason, dark aluminum allows a better view of windows from the exterior, detracting less than fiberglass from the architectural effect of traditional divided-light window styles.
However, the additional manufacturing step adds to the cost of production, and the coating will degrade when exposed to the elements, and so can only be placed on the inside faces of a double-paned window. Generally, solar control Low-E windows are soft coat and passive Low-E windows are hard coat due to the lower emissivity of the soft coat.
The ceramic and metallic window films usually cost 50-100+ percent more than regular window film but they can reduce energy transmission by as much as 80 percent. [4] Ceramic window films cost slightly more but provide a substantial increase by reflecting and absorbing infrared radiation (IR or radiant heat).
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Glass has three major components: a network former (silica), a network modifier (), and a network stabilizer (predominantly lime). [7] [8] In the early 16th and 17th centuries glassmaking (the manufacture of glass from raw materials) and glassworking (the creation of objects from glass) occurred within the same glasshouse. [9]
Most windows use argon (which is cheaper), but krypton is a better choice of insulation when the distance between the panes has to be smaller (the distance has to be about 13 mm (1 ⁄ 2 inch) for argon, and about 9 mm (3 ⁄ 8 inch) for krypton; increasing or decreasing the space will degrade performance).