Roof Garden Seating by Street Design Street Design makes a range of seating suitable for rooftop projects. Seats can be manufactured from FSC treated softwood, FSC iroko hardwood, galvanised mild steel, stainless steel and natural stone. Click on the Roof Gardens link below to see examples of seating with planters. Street Design seating can be manufactured from FSC treated softwood and FSC iroko hardwood, galvanised mild steel, stainless steel, natural stone or recycled plastics. Seats and benches can be supplied from our budget, standard, premier, bespoke and curved ranges. Seating can be supplied for above or below ground installation, with a choice of finish, including natural finishes, to help reduce on-going maintenance costs. Longer length seating can be supplied in sections for fixing together on site.