GSM - New Ulm
Company Overview
We are the top choice for roofing, heating, and cooling services in the area. We focus on commercial flat roofing and offer 24/7 emergency services for heating, cooling, and refrigeration.
Since its inception in 1904, Gag Sheet Metal has been owned by the same family across generations. John Gag is the present owner, having acquired the business from his father, Mike. Melvin passed the business to Mike, who had previously acquired it from George Gag.
Gag Sheet Metal, Inc. (GSM) has a longstanding commitment to customer service that began in 1904. Our headquarters in New Ulm, MN allows us to serve clients in Minnesota, Iowa, Wisconsin, North Dakota, and South Dakota. GSM holds the title of the oldest roofing and HVAC business in southern Minnesota, with a diverse range of services that have grown over the years.
Today, we provide a comprehensive selection of products and services, including appliances, kitchen and bathroom fixtures, heating and cooling, plumbing, commercial flat roofing, architectural sheet metal, and more! Our team of skilled staff, installers, and technicians possesses the expertise that distinguishes us from our competitors. We prioritize exceptional customer service and aim to build enduring relationships with our clients at GSM.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Gutter cleaning
- HVAC installation or replacement
- HVAC system repair
- HVAC system maintenance
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Roof inspection
- New roof installation
- Roof repair
- Roof replacement
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
| Mon: | 8:00 AM - 5:00 PM |
| Tue: | 8:00 AM - 5:00 PM |
| Wed: | 8:00 AM - 5:00 PM |
| Thu: | 8:00 AM - 5:00 PM |
| Fri: | 8:00 AM - 5:00 PM |
| Sat: | Closed |
| Sun: | Closed |
Recommended Customer Reviews
Cynthia H.I had them here to do some plumbing and heating services. Both techs did very well. They explained what was needed and what to expect. Very pleased. They were fair with me regarding the billing as well. I would definitely recommend!
Brittany S.We had basement flooding as tree roots were getting in the way, everytime we flushed it just backed up into the basement. The person who came out to do the service had to go back to New Ulm as the piece he needed was broken and needed to get a replacement before he could start. When the bill came we were billed for 2 house calls per his own mistake.
Laurie B.Not good. Hired them to install a new garbage disposal & redo the plumping under the kitchen sink. They did not sell one we wanted & they were way overpriced so we bought one elsewhere. They put it in & did not install the new sink flange that came with the unit we purchased & instead left the old corroded one in place. Then they had the audacity to take the new one with them. Then when questioned about it they lied & said the new unit didnt have one. Problem is we had looked at it before they came. It was attached to it & they actually had to take it apart before they installed the disposal. This actually happened a few years ago but I get just as upset every time I look at the old corroded one. Had they at least left it, we would have hired a reputable company to redo it. On top of all of this they charged a ridiculous amount on the bill. Stay away & find anyone else.


















