Application Roll shutters are constructed of strong double walled aluminum and come in a variety of colors; They mount on the outside of existing windows and doors and are easily operated from the inside; Versatility Virtually impenetrable, roll shutters provide complete protection at a low overall cost, for all types of business;They provide a thermal blanket to reduce heat loss during the cold winter months;They act as a reflector of the heat during the hottest part of the summer;They buffer unwanted sound- greatly reducing the degree of unwanted noise penetrating business operation; Operation LANGLEY AWNING & SIGN’S roll shutters can be operated with the push of a button from the inside of the house; Warranty Comes with a 5 year warranty and 2 years on electrical components;