Securing outdoor furniture on a rooftop is crucial for safety and compliance. Building codes are designed to prevent accidents, particularly from high winds. The first step is to understand your local building codes, which specify wind load requirements. Consult your building management or a structural engineer to determine the specific regulations for your roof.
For anchoring, you have several options. Non-penetrating systems are often preferred as they avoid compromising the roof's waterproof membrane. These systems use weighted bases, like ballasted pedestals or weighted footplates, to hold furniture down. For permanent structures, like a fixed pergola, penetrating anchors that bolt directly into the roof's structural members may be necessary. This must be done by a professional to ensure a watertight seal.
Always use furniture rated for commercial or heavy-duty residential use, as it is built to withstand the elements. Regularly inspect all anchors and connections for signs of wear or loosening. Proper anchoring protects your investment, your safety, and your neighbors below.