Water ponding on decks and balconies or permanent stains due to improper slope or drainage devices can be indicators of deck and balcony problems. Other problems that can lead to water intrusion into buildings are improper flashing, waterproofing membranes and coatings and improper deck/balcony attachment to the building. Poor design and construction can lead to many problems that can result in structural failure of the deck or balcony, including serious injury or death. Property owners should look for exterior stucco or interior drywall cracking and any staining due to possible water intrusion, which can lead to mold or dry-rot.