Overview
About Us
Roofing you and your neighbor's homes in Madison since 1939.
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Customer Reviews

"I reached out for an estimate to replace windows and had an appointment within a week with Marc Ganser. To my surprise, he did an assessment and advised that new windows weren’t actually needed—only new sashes and hardware. He identified the brand and referred me to the company locally who carries that brand. He then answered my questions about other issues in the space, and recommended someone he trusts, again, outside of Ganser Company, who has the skills to do what I need. While I didn’t end up needing to use Ganser Company at this time, I certainly will call in the future when needed, given the outstanding ethics I witnessed today."
"It has been over a year since we paid for our siding. They have been unresponsive to requests on a timetable to do our siding. When they do respond they say “We will get back to you.” Then never do. If they ever actually do our siding I’ll update this. Just so sick of the run around. Update: Ended up getting a refund as they wouldn’t be able to get to us this year. Did get refund, but was delayed because Marc Ganser didn’t like that we complained. We already signed with another contractor who has already begun work on our siding. Stay away from Ganser."
"UPDATE: After I published my initial review, I received a call within an hour letting me know that my work had been scheduled for the next morning. A worker showed up an hour earlier to get started, and completed the work satisfactorily. In fact, he did a fine job. While he was there, Nate showed up and introduced himself as a marketing manager for the company. He listened attentively as I gave him a friendly but honest account of my experience with Ganser. He noted that they were working to improve their customer service - even having removed some people from positions that met with the public. My experiences with the workers who showed up to examine my roof and provide estimates and do the work were friendly and fine. I emphasized their need to be communicative with customers and I felt my feedback was heard and responded to. I've updated to 3 stars because of that responsiveness, and the final quality of work performed, which was ok. It didn't solve my water flow problems, but eventually I found a vendor who knew what they were doing and did! I only wish the timeline had been shorter."

"PROFESSIONAL & KNOWLEDGEABLE CONTRACTORS"
"Experienced Contractor"

- "PROFESSIONAL & KNOWLEDGEABLE CONTRACTORS"
- "Experienced Contractor"
- "INFORMED & PROFESSIONAL CONTRACTOR"
- "GANSER COMPANY"
- "GANZER COMPANY"
- "GANSER COMPANY ROOFERS--WOW!"
- "PERSISTENT CONTRACTOR"
- "Customer asked us not to share his/her review."
- "MARK GANZEE, MET WITH BUILDING"
- "MARK GANZER WORKS WELL"
- "Professional and Knowledgeable Contractor"
- "Thorough estimate & professional installation."
- "Customer asked us not to share his/her review."
- "PROFESSIONAL, KNOWLEDGEABLE, COURTEOUS"
- "Professional and Knowledgeable Contractor and Installer"
- "Customer asked us not to share his/her review."
- "EXCELLENT CONTRACTOR"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Professional and hard-working"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "have a long history of good work in modern area"
- "Customer asked us not to share his/her review."
- "do a great job"
- "our salesman, Aaron, followed up and followed through in helping us with samples, recommendations, etc. The roofers worked steadily. They did not make a mess in the first place and left no trace when they left."
- "are the best roofer in Dane County"
- "Provide an accurate quote, stand by their work and provide quality workmanship"
- "did the work on time were considerate and professional"
- "would not recommend"
- "Quality"
- "are very honest experienced knowledgable"
- "are the best."
- "they performed adequately. Even though I had to hunt them down so they didn't work on the incorrect house."
- "did not only as expected but delivered a no concern situation to us"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "We will recommend that others NOT use Ganser because of poor workmanship and bad communcations."
- "do quality work"
- "would be appreciated"
- "do what they said in a timely way the quality of the work seems very good, the company has a very good reputation in the madison area"
- "were very professional and did a quality job."
- "are reliable"
- "Customer asked us not to share his/her review."
- "do quality work and are very thorough with the proper equipment and knowledgable employees."
- "act in the best interest of the customer kept customer enformed as job progressed"
- "do a good job all arounfd"
- "would want the top of the line in roofing"
- "do good work"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "covered all aspects of the installation to completion"
- "can be fully trusted to perform a claimed"
- "Customer asked us not to share his/her review."
- "DO THE JOB RIGHT FROM START TO FINISH THE GANSEN CO. RESPECT ITS CUSTOMER AND EMPLOYEES"
- "ARE WELL KNOWN AND REPUTABLE"
- "ARE GOOD AT WHAT THEY DO"
- "SEEMED TO WORK VERY HARD IN HARSE CONDITIONS"
- "DO A GOOD JOB"
- "EXCELLENT WORK"
- "WILL BE VERY PLEASED WITH THE HELPULNESS IN CHOOSING THE RIGHT PRODUCTS THAT ARE AVAILABLE FOR THE PROJECT, GREAT WORKMANSHIP AND CLEAN UP AFTER THE JOBS IS COMPLETED IT WAS A PLEASURE DOING BUISNESS WITH GANSER CO.INC"
- "THIS IS THE THIRD ROOF BY GANSER ON THIS HOME, 1959, 1982 2009 THEY ARE RELIABLE, COMPETENT AND ORGANIZED. NOT CHEAP BUT WORTH IT"
- "ARE COMPETENT AND CAREFUL"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "DO QUALITY WORK"
- "COMPLETED THE JOB ON TIME, VERY PLEASANT, DID A GREAT JOB"
- "go beyond the surface and suggest what you need for the correct job to solve problems."
- "DO THE JOB WELL IN A PROFESSIONAL MANNER AND ARE RESPONSIVE TO CUSTOMERS QUESTIONS AND NEEDS"
- "DO EXCELLENT WORK"
- "ARE HIGH COMPETENT"
- "DO EXCELLENT WORK"
- "DID A GOOD A GOOD JOB ACTED PROFESSIONALLY ANSWERED ALL MY QUESTIONS"
- "Customer asked us not to share his/her review."
- "CARE ABOUT THEIR CUSTOMERS AND THEIR REPUTATION"
- "are more professional and thorough than others"
- "Customer asked us not to share his/her review."
- "do quality work and guarantee their product"
- "are the best local provider of roofing needs"
- "Customer asked us not to share his/her review."
- "care"
- "Customer asked us not to share his/her review."
- "are very professional and thorough. They have a very personable attitude and great products and service"
- "HAVE AN EXCELLENT REPUTATION LOCALLY & WAS NOT DISAPPOINTED"
- "do a professional job and it's done right"
- "Customer asked us not to share his/her review."
- "are honest and very competetive for the services provided"
- "give you a excelent prduct at a fair price."
- "Customer asked us not to share his/her review."
- "they provide a high quality product, installed in a quality manner"
- "Customer asked us not to share his/her review."
- "are very professional and friendly people."
- "gave a good price for a professional job"
- "Desire to provide the highest quality product."
Awards
Installation Excellence Award
This award is for contractors that consistently install with a very high level of quality and provide their customers the highest protection that GAF offers.
Consumer Protection Excellence Award
This award recognizes those contractors that best protect their clients with system selling and enhanced warranties.
Training Excellence Award
This award is for contractors that are committed to training and continuous improvement.
Installed Roofs Near You
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