The best foundation for heavy urban outdoor furniture on a rooftop prioritizes distributing weight evenly and protecting the waterproof membrane. The optimal choice is a dedicated rooftop pedestal or paver system. These systems create a stable, elevated platform that allows for drainage, prevents punctures, and avoids "ponding" water. For direct placement, use large, thick composite deck tiles or interlocking plastic grids designed for roof decks. Never place heavy furniture directly on the roofing material. For individual furniture legs, wide, heavy-duty rubber foot pads or plastic "glides" are essential. They significantly increase the surface area, reducing point load pressure. A combination of a protective layer like a pedestal system and soft, wide foot pads offers the strongest defense. Always consult a structural engineer or your building management first to confirm your rooftop's weight capacity, as this is the most critical safety step before any installation.
What's the best foundation to put under heavy urban outdoor furniture on a rooftop to prevent damage?
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