More builders and remodelers are looking to rooftops as a way to provide much-needed outdoor space in urban housing. Ethan Ames, a Brooklyn deck builder in Brooklyn has designed an interlocking grid-and-panel decking system that's ideal for city roofscapes.

Here, he details how the technique works for Professional Deck Builder magazine:

Once we arrive on site, the task is straightforward: We lay out the numbered pieces and assemble the grid. Since we’ve carefully measured the perimeter, as well as the locations of utilities, skylights, bulkheads, or other encumbrances, we know the deck will fit. Oftentimes we fit the deck with a soft transition to obstacles, maintaining the grid pattern and using gravel, riverstone, or plant material to fill in irregularly shaped spaces.

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