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Fond du Lac, WI

While Ahern’s Fond du Lac campus is home to its corporate headquarters, prefabrication shops, and company-wide support operations, our primary focus is meeting clients’ construction and service needs. We deliver a complete line of mechanical, fire protection, and pipe fabrication contracting throughout the surrounding area, and offer extensive experience to general contractors, building owners, facility managers, and construction partners.

Fire Protection Services

Fire protection systems are our bread and butter. Our services range from basic design, to installation, servicing and repair. With a team of NICET-certified designers, experienced in-house fabricators, and seasoned field teams, we're well equipped to meet your project's needs. 
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Commercial HVAC Services

Since our inception, we've been a go-to commercial HVAC contractor in the Fond du Lac area. From central station air handling systems, to hot water heating plants, to variable refrigerant flow systems and everything in between, we have yet to find a project we can't handle. 
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Commercial Plumbing Services

Whether it pertains to an existing building or new construction project, we'll efficiently and effectively design, install, maintain and repair its plumbing systems. As one of the most established commercial plumbing contractors in Fond du Lac, WI, we have the resources and experience to complete your project in a timely fashion. 
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Pipe Fabrication Services

No pipe fabrication job is too difficult for our Fond du Lac team. Serving industries like power generation, food and beverage, pulp and paper, automotive, chemical, and many more, we can fabricate pipes ranging from 1/2-inch to 144-inch diameters, wall thicknesses up to four inches, and do so with a 98% on-time delivery rate. 
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Process Piping Contractors

Whether your process piping systems carry solids, liquids, or gasses, whether you operate in the pharmaceutical, pulp and paper, printing, manufacturing, alternative fuel, or power plant industries, our Fond du Lac team has the know-how and state-of-the-art facility for accurate, efficient and effective process piping solutions. 
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Location Features:

  • 13.62 Acres
  • Office Space - 108,520 sq ft
  • Fire Protection Shop - 32,000 sq ft
  • Pipe Fabrication Shop - 60,000 sq ft
  • Plumbing Shop - 4,920 sq ft
  • Sheet Metal Shop - 28,000 sq ft
  • Tools & Equipment Shop - 13,100 sq ft

Our corporate facility is commonly toured and showcased for its sustainable construction components that led to our LEED Gold certification. We invite you to learn more about our environmental focus and how we can improve the efficiency of your facility.

Contact Info

855 Morris Street
Fond du Lac, WI 54935
United States