GC Roofing
Company Overview
At GC Roofing, we aim to support individuals and businesses across California by addressing their roofing requirements. Our commitment is to deliver superior roofing systems for building owners, enhance our workforce through training, and give back to the community.
Gerry and Carol Thiesen joined the Conklin Company in August 1980. We found their products to be exceptional, and the training provided was the best in the field. Starting from our living room, G & C Enterprises has developed into a 3,000 square foot office and training facility on 7 acres.
We began by installing roofs on mobile homes and small patios. Soon, we recognized our desire to concentrate on the commercial sector. To date, we have completed roofing installations on properties up to 7.5 acres in California, Oregon, and Nevada.
We have waterproofed underground structures and agricultural buildings reaching heights of 120 feet. We attend training at least once a year to stay updated on the latest roofing technologies.
We are eager to work with you on your future roofing project. Our aim is for the roofing system we install for you to require little to no maintenance and be the last one you ever need.
I have been in the roofing industry and the owner of G&C Enterprise since 1980.
Business Services
- Roof inspection
- Roof repair
Business Location & Hours
Mon: | 9:00 AM - 5:00 PM |
Tue: | 9:00 AM - 5:00 PM |
Wed: | 9:00 AM - 5:00 PM |
Thu: | 9:00 AM - 5:00 PM |
Fri: | 9:00 AM - 5:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

On behalf of the Cunningham family I want to thank G & C Enterprises for their compassion and professional expertise' when helping us with our roofing needs during the difficult days of my father's passing. While the family was tending to my father at home, Gerry and Carol were taking care of all the details to insure the commercial buildings were fully coated. Their attention to every facet coupled with the ability to work with our tenants schedule was of great value to my father. He left this world knowing that his wife would not have to concern herself with un-happy tenants and leaky roofs.
Now, when we show the available building to perspective tenants, we proudly tell them of the special roof coating and the benefits it would provide through out the seasons. Not all warehouse buildings can boast about this impressive feature.
We highly recommend the services of G & C Enterprises. You will quickly notice, as we did, they are professional, trustworthy and experienced in all they do. Like us, you will not regret that you called upon G & C Enterprises.
~ Ralaine Cunningham Fagone

My home is a Geodesic Dome. It is incredibly energy efficient. The roofing system is beautiful, but leaked due to gale force winds a few years after we built it.
Gerry Thiesen came to the rescue! He and his awesome dad coated the house with an amazing product that expands and contracts with the weather. Then covered that with a great paint that lasts and lasts, and provides UV protection as well.
Once we had someone else coat the roof, and that was a terrible mistake. They were local and came highly recommended. Never again.
Last month, I called Gerry to talk about coating it again because it has been four years, and an inspection and recoat is recommended every three to five years. Would you believe a couple of weeks later, Gerry showed up after a seminar in Sacramento. My home is over an hour's drive the other way from his trip home.
He was NOT dressed for working on a roof, but he brought his climbing rope and connected to the ring in the center of the dome, and did a complete inspection, photographing any spots that looked iffy so he could get a better look while on the ground.
Since I pressure wash the home every year, Gerry recommended doing that, then touching up two spots I can get to from a ladder, using a small amount of product he left me. Bottom line, no need to re-coat and paint for three years.
You just can't find business men like this any more. The guy goes a couple of hours out of his way, spends two hours inspecting, and doesn't charge me. He says he likes it up here in the forest.
Any of you Yelpers in Northern California who need an amazing roofing system from an amazing company that stands behind their work, contact G & C Enterprises. He and this team coat schools, industrial buildings and lots of other buildings. Hehas hundreds of very happy customers.
Thanks, Gerry.