Americana Building Products Aluma Line Awning, 21 by 42-Inch Aluminum awning has horizontal panels that overlap and repel water and the sun's harmful rays White gloss underside reflects light into room, allowing awning to provide shade while minimizing its darkening effects Slope or pitch of awning can be adjusted upon installation Clip on panels eliminate noise from rattling parts All aluminum construction is strong yet lightweight and absolutely will not rust or rot