Build the frame of the roof on the ground.
How to build a deck roof step by step.
Trim deck in a straight line.
Build beams on top of posts.
Dig holes for footings and set in concrete.
Hammer in a small wood stake directly below each house mark as close as possible to the house.
Make a mark on the house for each end of the 20 foot deck.
Carefully place trusses precisely on the marks made and nail them into place one at a time.
Transfer these marks to ground level on the house using a mason s level and draw a line between the upper mark and the ground level mark.
Building on an existing deck.
Beginning at the shorter side of the deck roof mark the locations for the roof trusses every 24 inches on the center of the tops of the 2x8 pieces of lumber.
Tie your existing deck posts into the roof by extending your corner posts with the 4 by 4 lumber.
However for the modern designed buildings a deck roof is at the center of architecture meant to imitate the wide horizontal space of a natural landscape.
Check local building code to see if you can attach a patio roof directly to your deck.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
Plumb and brace the posts.
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.
Mark and attach trusses.
Lay out footings and attach the ledger board.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
How to build a roof over a deck.
You will first need to frame your roof.
A deck roof is not really that architecturally logical as snow and rain will shed off much faster on a slanted roof.