Do I have legal recourse against the manufacturer of a home that has had hidden defects?

Asked in Ravena, NY - 8 months

We purchased a newly manufactured home and took delivery in 2002. We, the reseller, and the appropriate local officials all inspected it, and saw no visible defects at that time. However, it turns out that the roof was constructed incorrectly, and has been soaking through since then. We first became aware of the problem in 2010 when the roof became saturated enough to allow water into the house proper. The manufacturer was contacted immediately, and indicated that they would take care of the problem as long as we followed the proper procedure (send samples to the manufacturer, have one of their approved contractors survey the damage and work up an estimate, etc.). Now that we have jumped through all their hoops, they have changed their minds and now refuse to acknowledge any wrongdoing.