Can I use cinder block as skirting on my manufactures home?

Concrete block are often used for skirting around here. It is durable and looks good. You at least need a 4 inch thick slab or base of concrete or the block joints will be all cracked up in a short time. I see mobile homes here set on a 4 inch slab with the blocks set up directly on the slab with no problems. Frost is not a major issue because it is the weight of the blocks only, not supporting the home.