How to build a porch roof over a deck. installing a roof over the existing deck which is not made with the intention to support a porch can be dangerous. this is because decks require additional footings and load to support the roof. therefore, a roof should not be built onto an existing deck.. A few years ago i built a deck with a pergola over it (14x20). i put 6x6 treated poles in the ground about 5 feet deep with the idea of putting a roof over it one day. i currently framed around the top using treated 2x12's with 2x10's running crossways with lattice on top. i am planning on putting a hip type roof over the deck.. Hip roof style it is sometimes used on a lower porch roof and screened porch, covered porch, wrap around porch, porch building plans, how to build a porch 6/12 pitch gable or hip roof design 8
