Check local building code to see if you can attach a patio roof directly to your deck.
How to build a simple deck roof.
For a solid connection you ll have to make sure the frame has the appropriate blocking.
As a result most decks have inadequate footings to support a new porch roof.
Install post base connectors to attach the support posts to the deck frame.
Install post base connectors.
Step 1 build the frame of the roof on the ground.
The simplest method and one that would work well against a two story house is a lean to type of roof.
Before you begin make sure you re matching the house roof pitch angle and overhang for your roof.
Then run joists connecting the front of your roof with the rear every two feet along the length of your roof.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
Let the epoxy set leaving it overnight will assure that it is rock solid and then add the anchor bolt anchor washer and nut and tighten.
Building a shed roof over a deck.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
These are used to attach the support posts to the frame of the deck.
Many porches use 22 diameter corner and intermediate.
I show you the difference between a flush beam and a dropped beam how.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Do not attach the post base to only decking.
The footings for porch decks must be larger than deck footings.
Typical decks are designed to support 55 psf lbs per square foot.
Make sure the frame has the appropriate blocking to ensure a solid connection.