Haag Engineering Co. is one of the oldest firms in this country specializing in the analysis of failure and damage.

• See also:
• Masterformat 2004
• 07 51 00 - Built-Up Bituminous Roofing
• 07 51 13 - Built-Up Asphalt Roofing
• 07 51 16 - Built-Up Coal Tar Roofing
• Masterformat 1995
• 07510 - Built-Up Bituminous Roofing