No, however all the openings for such doors and windows are formed as part of the construction of the MAS™ system. There are no “bucks”, channels, stops, etc. required. Once the MAS™ system shell is complete it is a simple matter to install windows and doors in the formed opening. In addition, there is no increased cost to have one or more windows as the MAS™ patented forming system allows for great flexibility in such placement within the areas so designated by MAS™ engineering.
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