One aspect of the disclosure is a siding system including a first panel having a first end and a second end, where the second end of the first panel includes a locking clip, and where the second end of the first panel forms a first portion of a channel. The siding system also includes a second panel having a first end and a second end, where the first end of the second panel includes a locking leg sized to engage the locking clip of the first panel, and where the first end of the second panel forms a second portion of the channel when the first panel and the second panel are engaged. The system also includes a batten sized to be removably engaged within the channel.