About Us

Our Experience

For over 15 years, Gunter Barnes Contracting Company has provided quality service to its customers in the commercial construction industry with a focus on simple jobsite solutions.

This can be seen in our newest patented product, the Stud Muffin®, a pre-assembled unit for sealing abandoned concrete core holes with up to a 3 hour rating. The Stud Muffin® design incorporates a rubber seal for restricting water, an intumescent for passive firestop protection, and a steel structure and top plate for strength. (Meets ANSI/UL1479 and IBC requirements for through floor penetrations.)

One of the best features of the Stud Muffin® is ease of installation. It simply presses into place from the top side without disturbing occupants below.

The Safety Muffin™ is another device within our line for covering core holes until the contractor is ready to install electrical, data or plumbing lines. These sturdy steel covers meet OSHA requirements on the jobsite and can be used over and over again.

At GunterBarnes, we make construction safer and more efficient. The Stud Muffin® and Safety Muffin™ reflect our commitment to product performance and reliability with ease of installation.



  • Healthcare
  • Office
  • Education
  • Hotels
  • Tenant Build-out
  • Mixed Use
  • Government
  • New Construction


  • Architects
  • Fire Protection Companies
  • Mechanical
  • Electrical
  • Plumbing
  • Data/Communications
  • Building Owners and Management
  • General Contractors
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The Stud Muffin is an All-in-one Fire Stop System
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