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Grieff's Exterior Service Co.

"Low Prices and Fast Service!"

About Us

Since 1992, Grieff's Exterior Services Co. in Pontiac, IL, has been a trusted provider of window replacement and new construction window services. We proudly serve Pontiac, Streator, Odell, Dwight, and the surrounding areas. Our specialties include seamless gutters, leaf protection, gutter guards, siding, roofs, and more. For all your exterior service needs, reach out to Grieff's Exterior Services Co. today.

Our Story

Grieff's Exterior Service Co. has been a trusted name in Pontiac, IL, for over 30 years, providing top-quality exterior services since 1992. As a family-owned and operated business, we pride ourselves on delivering exceptional craftsmanship and personalized attention to every project. Whether working on residential or commercial properties, we treat each job as if it were our own home, ensuring every detail is handled with care. With competitive prices, fast service, and a dedication to excellence, we’re committed to bringing your vision to life.

Our wide range of services includes professional window and door installation using trusted brands like ProVia. From replacement windows to new construction options, we offer solutions that enhance both the energy efficiency and aesthetic appeal of your property. For superior protection, we provide seamless gutters and downspouts, paired with advanced leaf protection systems like Gutter Shell, to safeguard your home from water damage. Our roofing installation services add an additional layer of defense, ensuring your property is well-protected.

We also specialize in durable vinyl siding, soffits, and fascia to upgrade your home’s exterior with long-lasting, visually appealing materials. Using trusted brands such as Mastic Ovation Siding, we ensure your investment stands the test of time. We can also use other brands if you prefer. Additionally, we offer entry and storm doors, garage entry doors, and a variety of other exterior enhancements designed to meet your specific needs.

What sets Grieff's Exterior Service Co. apart is our unwavering commitment to quality and customer satisfaction. As a small, family-run business, we understand the value of personalized service. Our attentive team takes the time to understand your needs, providing tailored solutions and treating every project with the care it deserves. We offer convenient appointment times, fast turnaround, and free estimates to make your experience seamless and hassle-free.

Our customers can expect friendly, professional service and high-quality results every time. By using premium products like ProVia doors and windows, we ensure that your home or business benefits from both functionality and style. Located in Pontiac, we proudly serve Pontiac and the surrounding areas, helping our community maintain and improve their properties.

If you’re looking for reliable, full-service exterior work, Grieff's Exterior Service Co. is here to help. From seamless gutters and leaf protection to roofing, siding, and windows, we provide everything you need to enhance your property. Contact us today for your free estimate and discover why our customers have trusted us since 1992. Let us bring your vision to life with the care and quality you deserve.

Areas Served

Livingston County, IL | Grundy County, IL | Odell, IL | Streator, IL | Morris, IL | Pontiac, IL | Dwight, IL | Forrest, IL | Fairbury, IL | Saunemin, IL | Cullom, IL | Flanagan, IL | Coal City, IL | Gardner, IL | Chenoa, IL | Ransom, IL | Lexington, IL

What We Offer

Our Specialties include:

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Testimonials

On 9/2/2025 Anonymous had this to say:
Very satisfied with product and workmanship !!! Did exactly as directed to. Repeat Customer !! Testimonial submitted anonymously directly to this site.

On 8/29/2025 Thomas McElwee had this to say:
This is my first review of a company, but I felt this was important enough to leave a message. I had some siding damage and wanted someone to come take a look. When Grieff's came out, the work was excellent, but the real mark came from the billing. Their employee only charged me for the one hour of work that it took. No upselling, no extra cost for materials I probably didn't need. They came in and got the job done. You can be absolutely sure I'll be recommending them for this honesty and character alone. Thanks for a great job!

On 8/26/2025 Anonymous had this to say:
We recently had a roof put on our home and also a sliding glass door replaced by Grieff's Exterior Services. They were GREAT! Very knowledgeable, prompt, and easy to work with. They do an awesome job cleaning up after themselves and the final jobs look very nice. Their friendly service goes a long way. I would HIGHLY recommend Grieff's for your next project!! Testimonial submitted anonymously directly to this site.

On 8/6/2025 Todd Folkestad & Katie Turner had this to say:
Thank you Grieffs Exteriors on a fabulous job on our roof and gutters. They were efficient and got the job done in a timely manner. We would recommend Grieffs Exterior to all who are in need of a new roof. Testimonial written by Todd Folkestad & Katie Turner on this site.

On 8/6/2025 Kristin Doolin had this to say:
Great Service, estimated time was accurate. Gutters look great and there was nothing that even looked like they’d been there besides the new gutters. Testimonial written by Kristin Doolin on this site.

Contact Us

Grieff's Exterior Service Co.
800 W Howard St Pontiac, IL 61764
Phone: (815) 419-2859
Fax: (815) 419-2857
Email: grieffext@gmail.com

Located in Pontiac

Where To Find Us

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Payment Types Accepted

Visa, MasterCard, American Express, Discover, Personal Checks, Debit Cards, Cash

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 7:30 AM - 4:00 PM
Tuesday: 7:30 AM - 4:00 PM
Wednesday: 7:30 AM - 4:00 PM
Thursday: 7:30 AM - 4:00 PM
Friday: 7:30 AM - 4:00 PM

News

🌴 Celebrate summer with upgrades that last! Grieff's Exterior Services Co. offers expert installation of gutters, leaf protection, entry doors, and roofing for both residential and commercial properties. 📆 Call today to schedule a future appointment and enjoy a stress-free summer while we handle the rest.

🌞 Summer's here! Optimize your home's comfort and protection with Grieff's Exterior Services Co. Our energy-efficient windows, gutter guards, and roofing solutions are designed to keep your home cool and secure. 📞 Book a future appointment now and enjoy peace of mind all season long!

🌞 Summer's here! Optimize your home's comfort and protection with Grieff's Exterior Services Co. Our energy-efficient windows, gutter guards, and roofing solutions are designed to keep your home cool and secure.
📞 Book a future appointment now and enjoy peace of mind all season long!
#SummerDays #WindowExperts #RoofingSolutions #EnergyEfficient

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