A rain gutter (from Latin gutta : drop), also known as a "rain catcher", is a narrow channel, or trough, forming the component of a roof system which collects and diverts rainwater away from the roof edge. It is also known as an eavestrough (especially in Canada), eaves channel, dripster, water collector (in Nigeria) or simply as a gutter.
WHY RAIN GUTTERS
-Rain gutter protects a building's foundation by channeling water away from its base.
-The gutter also helps to reduce erosion, prevents leaks in basements.
-Protects painted or stained surfaces by reducing exposure to water.
-Provides a means to collect rainwater for later use
-Gutters are also very effective at keeping building egress areas clear of falling water. (Going into a house entrance below water running straight off the roof in a heavy down pour is literally like taking a shower).