Theory #2 Ventilation Old houses didn’t have air conditioning and therefore have vastly more windows to help keep the structure cool on muggy summer nights. Many second front doors on homes, particularly Bungalows, lead from the front porch to the master bedroom. This design was kind of a poor mans sleeping porch.Click to see full answer. Keeping this in consideration, why do old houses have 2 front doors?In older homes – built in the 1800’s – the two doors were used by the family – one door for everyday family functions and the other was used to access the more formal areas of the home (like the parlor) for when you had guests.Subsequently, question is, why do Amish have two front doors? They were originally Amish houses with two front doors. One was for in, and the other was for out. It had to do with evil spirits not being able to get in. So it comes down to religious purposes. Herein, why do houses in New Orleans have 2 front doors? The tour guide described the two sets of double doors immediately behind the staircase as the “brise” (French for breeze, as the Creole would have spoken French). These doors were not for use by people. They were only to let the breeze in.Does a house have to have two doors?An exterior exit door is called an “egress” door in the building codes. Just one is the minimum requirement, and it must provide direct access from the living areas of the home to the exterior without traveling through a garage. Mobile homes, however, are required by HUD to have two egress doors.