Patio doors were originally created to replace French doors, offering an uninterrupted view of the natural daylight coming into the house, and providing easy access to the outdoors. As a result, patio doors are still hugely popular and due to demand, have become somewhat more elaborate over the years. However, they were not completely able to replace French doors; whereas the style and design of a French door is still seen as a classic and timeless look. However, the two are able co-exist on the market, benefiting the home-owner who has a choice of door options to consider.