In his latest newsletter for Building Science Corporation, Dr. Joseph W. Lstiburek, focuses on important water management details for balconies. (The details pertain to what some folks call a rooftop deck).
The waterproofing of the balcony deck needs to connect to the waterproofing of the walls. Remember the first principle of building enclosures? Connect the water control layer of the wall to the water control layer of the roof and to the water control layer of the foundation? Well, a balcony is a roof that you walk on. The aesthetic complexity results in construction complexity. The detailing and execution of the detailing is a big deal. It is probably the most difficult thing to get right and probably the most important thing to get right.