We're proud to offer Monumental Window and Door products to our customers. All-aluminum windows and doors are sturdy, sleek, and highly contemporary - perfect for homes with cutting-edge aesthetics. Click to browse their site. Island Contractors Supply is a supplier of building materials to contractors and developers exclusively serving the Hawaiian Islands. Mike Johnson, partner and founder, wanted to create a business focused on our relationships with our customers and suppliers. Our customers know and value us as a critical component of their business.