Garner, North Carolina-based Hamlin Sheet Metal was founded in 1954 by William F. “Fred” Hamlin to manufacture commercial air-handling ductwork.  Hamlin Sheet Metal became the first division of the Hamlin Cos., which now includes Hamlin Roofing, Hamlin Fabricated Metals and Ultratech Industries.

Many contractors have a comfort zone when it comes to the type of ductwork they prefer to use.