To prevent delamination and water damage in your Heartland RV, regularly inspect the exterior walls for any cracks, gaps, or signs of water intrusion. Keep the RV properly sealed and maintain the caulking around windows, doors, and trim. In case of water damage, it is crucial to address the source of the leak, dry the affected area thoroughly, and repair or replace any damaged materials. Consulting an RV professional is advisable for complex repairs.