Before you begin make sure you re matching the house roof pitch angle and overhang for your roof.
How to build a simple deck roof.
Simply put a couple of posts in the corners of the deck farthest from the building with a header between them and add rafters up to the roof of the building or attached to a ledger fastened to the wall of the building.
Do not attach the post base to only decking.
Building a shed roof over a deck.
The footings for porch decks must be larger than deck footings.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
These are used to attach the support posts to the frame of the deck.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
Install post base connectors.
I show you the difference between a flush beam and a dropped beam how.
Many porches use 22 diameter corner and intermediate.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Then run joists connecting the front of your roof with the rear every two feet along the length of your roof.
Typical decks are designed to support 55 psf lbs per square foot.
Step 1 build the frame of the roof on the ground.
Check local building code to see if you can attach a patio roof directly to your deck.
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.
As a result most decks have inadequate footings to support a new porch roof.
Make sure the frame has the appropriate blocking to ensure a solid connection.
Building on an existing deck.
Install post base connectors to attach the support posts to the deck frame.