Shed roofs project as a single plane roof pitched away from the house.
How to attach railing to flat roof deck.
How to attach a roof deck railing.
For stability the sections of railing install between posts that attach to the roof.
Assuming this roof was never meant to be a deck with railings you do not have posts going through the roof.
Those who have the expertise tools and equipment can notch and bolt wooden posts to the fascia board.
Typical decks are designed to support 55 psf lbs per square foot.
If you are tying the roof directly to a house wall you can install a ledger board with flashing and install rafter ties to attach the rafters at the appropriate angles or use engineered trusses.
Deckshield is a pvc flat roof deck waterproofing material designed to be slip and puncture resistant and make roof decks completely watertight.
Dont let someone just bolt through the flat roof.
Build up pads to mount the blocking properly.
The posts for the deck can be mounted directly to the deck framing using lag bolts so that the railings will be stable enough to act as proper fall protection.
Hopefully you have several points of contact to the home itself.
With wooden or hot application decks attachment of the handrail posts and the ends.
That is how you would have been getting your strenth and support for the rails.
All seams are heat welded.
Now all your strenth must come from surface mounted rail system.
Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch.
The more solid you get the perimeter sleeper system the better off you will.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Railings for roof decks provide safety and complement the design of a deck.
Paul nichter a contractor in islesboro maine responds.
Any framing toughing the deck is wrapped in either roofing felt or synthetic felt to prevent roof surface damage and protect against moisture on the deck framing.
I ve been building wood decks with safe railings over flat epdm roofs on the rainy coast of maine for over 15 years without compromising the waterproofing.