Epdm or any type of flat roof necessary to build up.
Attaching railing to flat roof.
The more solid you get the perimeter sleeper system the better off you will.
That is how you would have been getting your strenth and support for the rails.
The screws or lags should be as long as possible without protruding from the bottom of the sleepers and putting holes in the roof membrane.
Hopefully you have several points of contact to the home itself.
Include a corner post that has tabs at adjacent sides for attaching the handrail at each corner.
To properly attach a deck ledger follow these guidelines.
A 20 foot by 20 foot roof terrace or five small residential balconies could easily cost 40 000 to replace or install railings.
Gap between the bottom of any doors and the top of the deck boards.
Assuming this roof was never meant to be a deck with railings you do not have posts going through the roof.
It is essential to place 2x12 blocking on the flat between the sleepers at post locations so the lags will have something solid to bite into.
Place sections of the railing flat on the deck with posts positioned between each section.
Measure the size of the metal.
Now all your strenth must come from surface mounted rail system.
The first section that attaches at a wall has base plates at the outer ends of the railing.
Dont let someone just bolt through the flat roof.
Place a manufactured metal post flat on the roof at each mark.
That way water and snow melt won t be able to accumulate and seep under doorsills to ruin interior floors and storm doors will swing past ice snow.
Build up pads to mount the blocking properly.