Edward writes from Brooklyn, New York: "Any product to insulate exterior wall of a brownstone house? What is the recommended installation procedure? Recommended contractor in the area?"

Answer: The proper product and installation method depends on the existing assembly. I recommend contacting a certified energy professional for help. They can be found in the Yellow Pages of your phone book.

There is one certified energy professional in your area:
 Seal Rite Insulation of NY Inc
 718-241-6611
 One American Way
 Brooklyn, NY 11201