November 2012 Table of Contents Words: Dan KamysTable of Contents November 2012 Volume 51, Number 11 FEATURES Air Barriers: Impermeable or Permeable? Architects and engineers are faced with the challenge of selecting an air barrier from the many types available. Masonry reports. Green Building A case study focuses on how blended cements aid in sustainable design and construction. Natural Stone Learn how Indiana limestone is restored on buildings and structures that have been damaged by age, neglect and use. Patching: Extending the life of masonry Understanding the products available for patching lets you make better selections for each condition. COLUMNS & DEPARTMENTS From the Editor Chairman’s Message Government Affairs New Products MCAA Midyear Meeting Wrap-up Full Contact PM Classified Advertising News New Members MCAA Upcoming Education