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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:

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Testimonials

On 9/15/2025 Ed Hogan had this to say:
Very nice heavy duty doors. Wonderful installation they really look nice. Testimonial written by Ed Hogan on this site.

On 9/12/2025 Anonymous had this to say:
Great job, very thorough. The work was completed in a timely manner with attention given to detail necessary. Testimonial submitted anonymously directly to this site.

On 9/9/2025 Yogi Berra had this to say:
Grieff’s recently replaced a lot of our 85 year old windows. They did a great job, everyone we dealt with there was very nice. They came early in the morning, and worked all day, they get a lot done in one day. The new exterior aluminum window trim really fits well to the almost 60 year old aluminum siding. You won’t be disappointed if you hire Grieff’’s, 5+ Stars all around!!

On 9/7/2025 Yogi Berra had this to say:
Grieff’s recently replaced a lot of our 85 year old windows. They did a great job, everyone we dealt with there was very nice. They came early in the morning, and worked all day, they get a lot done in one day. The new exterior aluminum window trim really fits well to the almost 60 year old aluminum siding. You won’t be disappointed if you hire Grieff’’s, 5+ Stars all around!!

On 9/7/2025 Keith and Kathy Perry had this to say:
We love our new windows and can't say enough good things about every part of the process. From our initial contact with your sales office to the estimate, measurements and the installation was fabulous! Unbelievable that your team installed all our windows, reinstalled our inside trim, shutters and siding in one day! Thank you for everything! We will definitely call you when we are ready to replace our doors! Testimonial written by Keith and Kathy Perry 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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