Great question! From our outdoor bench factory, the lightest option we offer is our AlumaLite Aluminum Bench. Weighing in at just 9.2 kilograms (about 20 pounds), it’s engineered specifically for spaces like rooftop terraces where weight matters. The frame is made of aircraft-grade aluminum, which is not only incredibly light but also fully rust-resistant. The seat uses high-density polyethylene slats that are UV-stabilized, so they won’t fade or warp under direct sun. Assembly takes less than five minutes—no tools required—because the components lock together with a simple click system. You can easily carry it up a stairway or move it across the terrace by yourself. Compared to our wooden benches (typically 15–20 kg) or steel benches (22–30 kg), the AlumaLite is at least 40% lighter while still supporting up to 150 kg in weight capacity. It also features a narrow profile (width 45 cm), making it perfect for small rooftop layouts. If you need something even lighter, we can build a custom version with a hollow extrusion frame that cuts the weight down to 7.8 kg, although the lead time would be two weeks. For off-the-shelf availability, the standard AlumaLite is your best bet. We ship in flat packs to keep freight costs low, and the bench comes with a 5-year warranty against corrosion. Just keep in mind that because it’s so light, you might want to place it near a railing or use the optional anchor kit (adds only 300 g) if your rooftop is especially windy. Overall, this is the lightest, most practical bench from our factory for your terrace—and it looks sleek and modern too. Order a sample, and you’ll be impressed by how effortless it is to move.