I am building a new home. Hardiplank siding was installed. On one long outside garage wall the siding is wavy and in places comes away for the way about an inch. The contractor tried to correct the wavey problem by cutting the inside 2x4's. Didn't help. Then they tried installing additional 2x4's next to the original ones. No luck. Also inside the garage you can see multiple rows of nails that missed the studs. Anyone have any ideas on correcting this. The contractor doesn't seem to know why the problem occured or how to correct it. the siding is wavy in other places along other walls of the house is varing degrees. The garage wall is the worst.