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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:

Our Services include:

Our Brands include:

Our Products include:

Testimonials

On 5/9/2026 Ethan and Scot Schickel had this to say:
I have used Grieff’s many times over the years and will continue in the future. Their entire team is easy to work with and their communication is very timely. They are detail oriented and they helped us navigate the process for a Nicor grant for an upgrade. Thank you to the entire team. Testimonial written by Ethan and Scot Schickel on this site.

On 5/7/2026 Bob Russell had this to say:
The Grieff crew just finished replacing all asphalt roofs and vinyl siding and windows from damage from a 2 1/2" sized hail storm. The crews were very professional and did and excellent job. In over 50 years around construction and working with different contractors, I have come to expect many construction workers to be crude in their vulgar language, arguing with each other and having the boom box turned up so loud I couldn't hear them when they asked a question. There was none of that with Tim & Kelsey's crews. I would not hesitate to hir them again for any work I might need. Thank you Tim and Kelsey. Testimonial written by Bob Russell on this site.

On 5/6/2026 Larry Thorndyke had this to say:
Great people to work with. When done installing everything was very clean. Highly recommend them Testimonial written by Larry Thorndyke on this site.

On 5/4/2026 Cathi Folkerts had this to say:
We had all.of our old soffits and fascia replaced on our home. The Grieff crew was extremely professional and efficient. They worked non-stop and did a great job cleaning up. It was a big job and we're so happy with the final project. Thank you Grieff's Exterior Services guys!

On 5/4/2026 Sally chapman had this to say:
Very good service and clean up very nice people!! Testimonial written by Sally chapman 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

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

Info

Provia
Gutters
Siding
Gutter Shell
Residential Roofing
Malarkey Roofing

FAQ

What services does Grieff's Exterior Service Co. offer?
We specialize in a wide range of exterior services including:

Window replacement and new construction windows
Seamless gutters and gutter guards
Leaf protection systems
Siding installation
Roofing services
We proudly use trusted brands like ProVia and Gutter Shell to ensure quality and durability.
What areas do you serve?
We serve Pontiac, Streator, Odell, Dwight, and surrounding communities in Illinois. If you're unsure whether you're in our service area, feel free to contact us directly.
How long has Grieff's Exterior been in business?
We’ve been a trusted name in exterior services since 1992, delivering reliable craftsmanship and fast service for over 30 years.

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