We completed a dry wall job without adequate heat supplied. Upon finishing, the walls continued to crack out. We advised them the whole time that the drywall needs heat. The homeowner paid us for the job then hired us for another job doing a fence and decks. Now we have completed the fence and decks they are not paying us on the basis of the drywall job cracking out. Since it is 2 seperate contracts I would like to know if they can legally do this.