Screen Sizes
Fiberglass screen material is typically available in 100 foot rolls in varying widths, from 18 inches to 120 inches wide. Aluminum screen material is available in 100 foot rolls except the range of available widths is less than for the more commonly used fiberglass. The fineness of a screen mesh is measured in wires per inch on the warp (length) and the weft or filler (width). An 18×14 mesh has become standard; 16×16 was formerly common and other common sizes are 18×18 and 20×20.
Fiberglass solar screens provide over 75% of UV protection, by using thicker strands and a closer mesh than regular 18x14 fiberglass window screening. There is some reduction in visibility, but this can be advantageous, since Solar Screens are difficult to see through from the outside, while easier to see through from the inside.
Finer meshes have been developed to prevent very small insects, often called "noseeums" from flying through. The finer mesh screens are also used to prevent pollens and allergens from entering homes in order to control allergic reactions.
Read more about this topic: Window Screen
Famous quotes containing the word screen:
“We like the chase better than the quarry.... And those who philosophize on the matter, and who think men unreasonable for spending a whole day in chasing a hare which they would not have bought, scarce know our nature. The hare in itself would not screen us from the sight of death and calamities; but the chase, which turns away our attention from these, does screen us.”
—Blaise Pascal (1623–1662)