Contour Roofing & Windows Nelson Ltd provides a complete exterior building solution — offering metal roofing, cladding, rainwater systems, aluminium windows and doors, louvres, garage doors, and steel framing. Established in 1993 and now part of a larger network, they deliver supply, custom fabrication, installation, maintenance, and re-roofing services for residential, commercial, and industrial projects, with free quotes and high-quality workmanship.