Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch.
How to build a roof over my existing deck.
When you start building your roof over the deck try and get some material that compliments the decking.
Discuss the following issues with your professional handyman during the deck roof design process.
Treat it with the same products to give it a similar finish.
The best time to build a roof over your deck is during the construction of the deck itself.
How to build a roof over your deck.
For a solid connection you ll have.
These are used to attach the support posts to the frame of the deck.
If local codes allow setting the overhead directly on an existing slab but the concrete is not thick enough to support the overhead s weight you will have to pour new footings around the slab s perimeter or break out sections and pour deeper footings.
Typical decks are designed to support 55 psf lbs per square foot.
Start here if you want to build a roof over a patio or deck.
Build the frame of the roof on the ground.
Building on an existing deck.
Before you begin make sure you re matching the house roof pitch angle and overhang for your roof.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Tie your existing deck posts into the roof by extending your corner posts with the 4 by 4 lumber.
If you have an existing deck it s possible to add a roof to it by installing additional supports.
You might want to use the same wood or something else.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
How to build a roof over a deck.
How to build a shed roof over my existing deck.