Porch decks require 25 additional psf for roof loads for a total of 80 psf.
How to build a shed roof over an existing deck.
The best time to build a roof over your deck is during the construction of the deck itself.
Instead of working at a table or other raised surface it s best to build the wooden trusses on the ground.
Install rafters on 16 inch centers assembling the structure with 4 inch stainless steel screws and an electric screwdriver.
Take a look at our step by step guide for building a shed roof over your existing deck.
Attach the shed roof to the home s framework with anchor bolts.
Building a shed roof over a deck.
Our experts can take care of all this and more.
Do not attach the post base to only decking.
Install post base connectors.
Purchase 2 by 6 inch pressure treated boards to construct the shed covering.
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Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch.
Typical decks are designed to support 55 psf lbs per square foot.
Pre cut the rafters and support columns with an electric circular saw.
Install post base connectors to attach the support posts to the deck frame.
You can build your own shed trusses by using a standard jig.
If you have an existing deck it s possible to add a roof to it by installing additional supports.
Build the trusses as a rule of thumb you will first need to build the walls and floor before you can start to build the shed trusses.