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Door threshold height on Roof Deck: Is this a code violation?

shw001
10 years ago

There is a flat roof (about 300 square feet) on a one-story part of my house. There is a door out to it from one of the bedrooms. The door threshold is 3 inches above the roof deck. I am thinking of adding insulation to the roof and a new rubber/plastic roof membrane which would reduce the threshold height to only 1/2 inch above the deck. Does anyone see any practical issues or building code issues with such a small clearance?

We do not use this roof, except for occasional maintenance, like gutter cleaning.

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