A manufactured home is supported at specified points under the structure. There are usually eight such points under which the piers are placed. The outside egde must not be used for support or the warranty can be voided. The skirting is decorative, for the most part, but it does keep some of the local animal population out.

mg...look up you local manufacturind housing association or check with one of the national organizations. They have literature they will send. You may be surprized at the number of optional skirting designs possible.