Is there any metamagic feat which allows energy-damage-dealing spells to have full effect on objects? I was making a Sorcerer/ElementalSavant specializing in Cold and then I realized that Cold deals 1/4 damage to objects BEFORE hardness 
If there is no such metamagic feat in existence, what would you think the prereqs and spell level adjustment of such a critter would be?

If there is no such metamagic feat in existence, what would you think the prereqs and spell level adjustment of such a critter would be?