Awnings made of weather- resistant fabrics can be adjusted as the weather varies to protect windows from sun, rain, and dirt while casting a soft, pleasant light inside. They are available in many designs and colours, which must be selected with the knowledge that they are subject to fading, soiling, and wind damage. However, awnings can reduce solar heat gain as much as 65-75percent.metal awnings, usually aluminum, can either be stationary or roll up. They are higher in initial cost than fabric types but pay for themselves with a longer life. The major design problem with awnings is making them look like integral parts of the structure rather than afterthoughts.
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