Business Details
50+ Years
experience
Trusted Roofing & Siding Solutions in Northern Illinois
Founded in 1971, Theisen Roofing & Siding has been a trusted provider of premium roofing, siding, and gutter solutions in Northern Illinois. As a family-owned business now led by third-generation owners Jeff and Brian Theisen, we combine decades of hands-on experience with a commitment to quality craftsmanship. Our team of dedicated professionals takes pride in delivering personalized service, ensuring every project meets the highest standards of durability and aesthetics. With an A+ rating from the Better Business Bureau and certifications from industry leaders like CertainTeed and Malarkey, we prioritize transparency, reliability, and long-term customer relationships.Our 20,000-square-foot facility in Cortland enables us to serve DeKalb County and surrounding communities with seamless installations, repairs, and custom solutions tailored to each client's needs. By maintaining full control over our work and avoiding subcontractors, we guarantee consistent quality and accountability from start to finish.
Services
Roofing
Siding
Gutters
Repairs
Seamless Gutters
Details
- Year established: 1971
Highlights and features
- Family-owned since 1971 with third-generation expertise
- Maintain A+ rating with Better Business Bureau
- No subcontractors all work completed by in-house team
- Certified installers for premium roofing materials
- Offer free estimates for all residential projects
Associations and certifications
- Better Business Bureau
- CertainTeed
- Malarkey
What people say
Excellent service
Quality workmanship
Professional team
Reliable
Great communication
Services
Roofing
We provide comprehensive roofing solutions including tear-offs, reroofing, and repairs. Our certified team uses premium materials like CertainTeed and GAF shingles to ensure durability. From minor fixes to complete replacements, we deliver long-lasting results with free estimates for all residential projects.
Siding
Our siding services cover vinyl, cedar, and aluminum options with professional installation and repairs. We handle soffit/fascia upgrades and window wrapping to enhance curb appeal. Each project includes personalized consultations to match your home's aesthetic while improving energy efficiency and structural integrity.
Gutters
Custom-manufactured seamless gutters in 20+ colors protect your home from water damage. We install 5 and 6-inch aluminum systems with matching soffits and fascias. Our team also provides gutter repairs and maintenance to ensure optimal drainage for residential properties across Northern Illinois.
Repairs
We offer prompt repair services for roofs, siding, and gutters to prevent further damage. Our experienced crew addresses leaks, rot, and storm damage with urgency. Free estimates help homeowners understand repair scope while maintaining our commitment to quality craftsmanship and customer satisfaction.
Seamless Gutters
Custom seamless gutters eliminate leaks and improve water management. Available in multiple colors to complement your home's exterior, our systems include professional installation and repairs. This service enhances property protection while maintaining aesthetic consistency with your roofing and siding choices.
People
Jeff Theisen
Co-Owner
Joined the family business in 1978, bringing over 45 years of roofing expertise. Focuses on operational leadership and quality control.
Brian Theisen
Co-Owner
Has managed projects since joining in 1989, ensuring adherence to industry standards and customer expectations across all installations.
Eric Theisen
Project Manager
Third-generation team member since 2010, overseeing daily operations and client communications with a focus on service excellence.
Questions
What services does Theisen Roofing offer?
We specialize in residential roofing, siding, seamless gutters, and related repairs. Services include installations, replacements, and maintenance for Northern Illinois homeowners.
Are you certified by roofing material manufacturers?
Yes, we are certified installers for CertainTeed and Malarkey roofing products, ensuring proper installation and warranty compliance for premium materials.
Do you provide free estimates?
Yes, we offer free estimates for all residential roofing, siding, and gutter projects with no obligation for Northern Illinois homeowners.
How long have you served the Cortland area?
Since 1971, our family-owned business has served Cortland and surrounding communities with quality roofing solutions and personalized service.
Do you subcontract work to third parties?
No, we maintain full control by using our own experienced team for every project, ensuring consistent quality and accountability from start to finish.
What payment methods do you accept?
We accept major credit cards and traditional payment methods. Specific options can be discussed during your free consultation with our team.
Reviews (6)
Darryl Wohlt
Nov 21, 2021
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I heartily commend Theisen Roofing for my roof and partial siding replacement. With the pandemic, and the supply chain delays, it was a full year from estimate to completion, but Eric paid attention to my specific requests and carried them out flawlessly. My old roof was a bit troublesome (two layers) but the crew tackled it with impressive skill and professionalism, and I'm very pleased with the results.
John Ahlbach
Aug 15, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
Theisen performed some aluminum work around some windows at my house. Eric provided me with a quote in a timely manner. There was a minor issue with some of the windows and they came back immediately to fix them to my satisfaction.. I would highly recommend this company for any roofing or siding work.
Theisen performed some aluminum work around some windows at my house. Eric provided me with a quote in a timely manner. There was a minor issue with some of the windows and they came back immediately to fix them to my satisfaction.. I would highly recommend this company for any roofing or siding work.
Rich Kaminski
Aug 15, 2021
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Positive:Professionalism,Quality
We had to have leaf gutters installed because of the maple trees around us.
Eric came out gave us an estimate, when the job would be scheduled, and the amount of time the install would take. Everything was installed in a professional way and we are very pleased with the work. Would highly recommend this company.
Service:Gutter repair
We had to have leaf gutters installed because of the maple trees around us.
Eric came out gave us an estimate, when the job would be scheduled, and the amount of time the install would take. Everything was installed in a professional way and we are very pleased with the work. Would highly recommend this company.
Service:Gutter repair
Paul S.
Apr 14, 2021
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Eric Theisen was prompt to respond to hail damage that required my roof and skylights and gutter system be replaced. His estimate was very competitive and the work was done expertly with courteous and professional workers on site. They seemed meticulous trying to clean up the site after every work day. I highly recommend Theisen Roofing Siding.
Michelle Schroeder
Oct 10, 2020
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Positive:Professionalism
We are absolutely satisfied with the work Theisen provided. They provided a quality product and their employees performed in a well and efficient and reserved manner. Overall we appreciated the professionalism and curiosity this company has displayed to us.
We are absolutely satisfied with the work Theisen provided. They provided a quality product and their employees performed in a well and efficient and reserved manner. Overall we appreciated the professionalism and curiosity this company has displayed to us.
Julie Ann Myers
Aug 05, 2020
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Thiessen is top of the line in work quality, service, conscientiousness and local tradition. Theissen's 50 years of excellent reputation in this community is well-deserved.
