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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 been a trusted name in exterior home improvement since 1992. Proudly serving Pontiac, Streator, Odell, Dwight, and surrounding communities, we specialize in window replacement and new construction windows, along with seamless gutters, gutter guards, siding, roofing, and more. Count on our experienced team for quality workmanship, reliable service, and exterior solutions that enhance and protect your home.

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 10/11/2026 Bradley Young had this to say:
Sales team was very knowledgeable of the costumers needs, took several measurements before ordering windows to ensure the proper size and fit. Installers did a remarkable job of showing professionalism during the removal and installation of the old and new windows. Cleaned up the work they had done on both inside and outside of the home. Sealed the windows with a very nice caulk bead around all windows both inside and outside of windows. Explained in detail how windows operate for cleaning purposes. Sales team and installers I would give them a 110% rating on a job well done. Looking forward to having them install new facia, soffit and gutters around the entire home. Highly recommended for your homes updating and improving needs. Testimonial written by Bradley Young on this site.

On 10/6/2026 Jeanette Ruszel had this to say:
Grieff's did an excellent job in replacing our gutters & fascia. They arrived on time and cleaned up everything before they left.

On 10/6/2026 David Petersen had this to say:
Roof was installed professionally, fast and efficiently. Ground was thoroughly picked up. Testimonial written by David Petersen on this site.

On 10/4/2026 Dawn Malone had this to say:
Grieff’s handled the complete residing of our 2-story house. The office staff and siding team were always pleasant to work with, professional and very efficient. Highly recommend this company.

On 9/28/2026 Steve Fuss had this to say:
18 windows and a rear entry

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 - 12:00 PM
Friday: 7:30 AM - 4:00 PM

News

🏡 Financing Available for Your Next Home Improvement Project! 💰

Don't put off the exterior upgrades your home deserves. Grieff's Exterior Service Co. offers convenient financing options through Wells Fargo to help make your project more affordable.

✅ No Interest if Paid in Full Within 18 Months
Make regular monthly payments and pay no interest if the balance is paid in full within 18 months.

✅ 8.99% Interest for 60 Equal Monthly Payments

✅ 9.99% Interest for 96 Equal Monthly Payments

Whether you're planning new roofing, siding, windows, gutters, or other exterior improvements, we can help you find a financing option that fits your budget.

Contact Grieff's Exterior Service Co. today to learn more and get started on your next project!

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 proudly serve Pontiac, Streator, Odell, Dwight, and nearby communities throughout the region. Homeowners across these areas rely on us for professional exterior improvement services that improve curb appeal, energy efficiency, and weather protection. If you're unsure whether you're within our service area, contact us and we'll be happy to discuss your project.
How long has Grieff's Exterior been in business?
Grieff's Exterior Service Co. has proudly served homeowners since 1992. With more than three decades of industry experience, we have built a reputation throughout Pontiac and surrounding communities for dependable service, quality craftsmanship, and customer satisfaction. Our longevity reflects our commitment to doing the job right and building lasting relationships with our customers.
Do you install windows for new construction projects?
Yes. In addition to replacement windows, we provide professional installation of windows for new construction projects. Whether you're building a new home, adding an addition, or completing a major renovation, we can help you select and install quality windows that complement your design and performance requirements.
How do I get an estimate for my exterior home improvement project?
Getting started is easy. Contact our team by phone at (815) 419-2859 to discuss your project. We'll listen to your goals, answer your questions, evaluate your needs, and provide recommendations tailored to your home and budget. Our goal is to make the process straightforward and stress-free from start to finish. [grieffsext...rioril.com]
Why should I choose Grieff's Exterior Service Co.?
Homeowners choose Grieff's Exterior Service Co. because of our experience, quality workmanship, and dedication to customer satisfaction. Since 1992, we have helped homeowners improve and protect their properties with dependable exterior solutions. We take pride in providing reliable service, honest communication, and results that enhance the beauty, comfort, and value of every home we work on.

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