I need a patio cover installed.

[Irving]

Is likely a 1/12 or 2/12 pitch, so it'll be modified bitumen instead of a shingle.

Edit, actually, you can see in the picture that roof is shingled. In that case, you have to ask the building department and they will make you do the entire square footage in at least double felt (required by code on slopes under 4/12), but more likely just do all ice and water shield.