This is a picture of our back patio. I would like to install a patio roof, but the configuration of the current roof lines is giving me some trouble. As you can see, the roof above the backdoor runs down the side-wall of the main house. How would you orient the roof over the patio, to prevent water from leaking in? Is there a way to tie the roof into the side of the house? Or, should I slope the roof away from the main house (left-to-right), underneath the pictured gutters? I want to cover all or the majority of the concrete patio, but not sure how to tie-in, without water leaking. Any ideas would be greatly appreciated. Have a blessed day.