Earth berm a crawl space

Hi folks,

I recently moved into a mobile home in northern British Columbia.  The floor is always cold because of the unheated crawl space below the building.  I am thinking the build a raised bed, essentially and earth berm, around the skirting.  Any thoughts, concerns or suggestions?  What material would you recommend to put between the skirting and the dirt?

You can berm it but you'll have to ventilate to prevent moisture and rot = still cold. You could pile snow around in the winter after everything is frozen but you can't seal it off all year.

Spray foam insulation is about the best option to insulate the floor from underneath.