If the deck doubles as a porch it needs to be able to support no more than 80 psf.
Put roof on an exiting deck.
No matter the situation either attaching to an existing deck or building onto a deck that is being built in progress the weight of the roof needs to be considered in relation to the deck.
Or you can lag screw through post bases and decking into the top of a deck joist or beam.
In most cases larger footings and sometimes more footings are required for a roofed deck.
Can anyone advise me on a preferred way to put a roof load over an existing deck.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Install post base connectors.
Existing deck is 24 w x 10 deep ledgered to house rear beam is 8 back so there s a 24 cantilever.
I don t know if can or should avoid spending on an engineer for this.
A regular deck can support a certain amount of weight per square foot but a deck roof adds a lot of weight and requires support.
Take a look at our step by step guide for building a shed roof over your existing deck.
2x8 joists 16 oc dbl 2x10 rear beam.
Porch decks also require larger footings than deck footings.
Building on an existing deck where local building codes allow this practice you can bolt a patio overhead s posts directly to existing deck beams joists or other heavy structural members.
If the roof is attached to the deck it needs to be able to support the weight.
Typical decks are designed to support 55 psf lbs per square foot.
Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch.
Decks typically are designed to support 55 pounds per square feet or psf of weight.
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