An employee was on a 32-foot fiberglass ladder positioned on a porch roof, using a caulk gun to seal the fascia board around the gable of a house. He was about 16 feet up the ladder, which was not fully extended. The base of the ladder slid away from the house. The employee fell onto the porch roof, then to the ground below, a distance of about 10 feet. He suffered broken ribs, lacerations and facial abrasions, and a potential facial fracture.