Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
How to build a back deck roof.
Install post base connectors.
The footings for porch decks must be larger than deck footings.
Take a look at our step by step guide for building a shed roof over your existing deck.
Before you begin make sure you re matching the house roof pitch angle and overhang for your roof.
Building on an existing deck.
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.
Typical decks are designed to support 55 psf lbs per square foot.
Joining a home made roof to your existing roof might require a level of expertise that you don t really have.
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.
Tie your existing deck posts into the roof by extending your corner posts with the 4 by 4 lumber.
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.
How to build a roof over a deck.
However many decks are right next to the back of your house which raises a few issues.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
As a result most decks have inadequate footings to support a new porch roof.