There are two main different types of fence panels boards. Those built with a standard fence board, and those built with a premium channel fence board. With a standard fence board you will end up with gaps in between your boards due to the seasonal change in weather that will cause shrinkage and expansion in the wood.
With a channel fence board you have a overlap with the boards. The result is you avoid the regular gaps that a traditional fence board would cause as well as the overlapping can help keep the boards from warping.
Another advantage of channel over traditional boards is that they are visually different. Often homeowners are looking for a products that doesn’t look like a photo copy of every other house in the neighbourhood. With the Channel Pattern it give the nice aesthetic appeal along with a more professional look.