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Grieff's Exterior Service Co.

"Low Prices and Fast Service!"

About Us

Grieff's Exterior Services Co., in Pontiac, IL, has offered window replacement and new construction window services since 1992, serving all of Pontiac, Streator, Odell, Dwight and the surrounding communities. We specialize in seamless gutters, leaf protections, gutter guards, siding, roofs, window replacements, windows for new construction and more. For all of your exterior service needs, contact Grieff's Exterior Services Co. in Pontiac 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 3/30/2025 Anonymous had this to say:
Grieff's are always my go-to place to have any exterior work done on my home. I recently had a new kitchen window installed and the 2 very professional men that came out were exceptional. They were only at my home for 1 hour and had removed the old window and installed the new one. They cleaned up all the mess and took the old window with them. I was very impressed with them. Testimonial submitted anonymously directly to this site.

On 3/21/2025 Anonymous had this to say:
Install was quick, clean, and professional! Testimonial submitted anonymously directly to this site.

On 3/19/2025 Ben Thomas had this to say:
Very good at there job in formed when doing something different. Picked up when done Testimonial written by Ben Thomas on this site.

On 3/4/2025 Connie Wait had this to say:
Here at &:30 AM. Asked me if I wanted to get my car out of he garage. Worked steady until 1:30 and left. Seems that all went well. I would recommend them to anyone. Testimonial written by Connie Wait on this site.

On 3/4/2025 Connie Wait had this to say:
Here at &:30 AM. Asked me if I wanted to get my car out of he garage. Worked steady until 1:30 and left. Seems that all went well. I would recommend them to anyone. Testimonial written by Connie Wait 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, Discover, American Express, Personal Checks, Debit Cards, Cash

Our Hours

Holiday Hours May Vary. Please Call For Details.

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

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