I ve never had a snowboard move back while being clamped in this is from my experience with my equiptment.
Put away a snow board on roof.
Put the snowboard in the trunk or across the back seat area.
This is a short video of installing roof top ski rack instruction.
Just make sure the rubber in the rack is really clamped down tight.
Small bungee cords may be useful.
I assume you are refering to the roof rack snowboard carriers that clamps down on the snowboards then yes it s safe to put then without bindings.
Sweep away the remnants of the snow on the roof after removing the excess.
Arrange it so the straps to not slack so they don t slap the roof of the car when at speed.
Use a screwdriver to remove the bindings and keep track of how they were positioned.
If you ve got to show off your board on the roof rack put a good rope.
That way you don t get road grime and salt all over your board.
Push the snow off the closest edge to where you are standing where you are able to move across the roof.
They fit multiple crossbar styles and their capacity includes up to 8 pairs of skis or up to 4 snowboards so you can bring the whole family s gear along.
A variety of ski and snowboard carriers are available.
Put your board with bindings on it in the bag and fasten that to the roof rack.
Stand where you will be able to drag the broom toward and past you to sweep the snow to the ground below rather than pushing it across the surface.
Depending on your snowboard and how you position your feet you ll have several options.