You usually don't need to include extra .row .col-md-12 divs as shown below: <div class="row"> <div class="col-md-12"> ... </div> </div> (unless you need to use floats inside the column) A bootstrap row has a margin of -15px, and a bootstrap column has a margin of 15px. The two divs effectively cancel each other, and are generally not needed inside of Rock blocks. Example: https://codepen.io/garrettjohnson/pen/jOPWMpa?editors=1000