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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:

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Testimonials

On 7/4/2026 Dawn Boitnott had this to say:
We love our new windows!! It was a pleasure to work with ALL Grieff’s staff, they are polite, knowledgeable and do great work! We highly recommend them for home improvement needs, you wont be disappointed!

On 6/28/2026 Karen Moritz had this to say:
The crew that installed my new gutters were very professional and informative. The installation was quickly completed. I highly recommend them.

On 6/22/2026 Katie Hargan had this to say:
We were very happy with Grieff’s Exteriors work, punctuality, customer service and honesty. We felt in very good hands every step of the way and look forward to working with them as needed in the future.

On 6/22/2026 Katie Hargan had this to say:
Very happy with their customer service, promptness and workmanship. Will absolutely work with them in the future. Testimonial written by Katie Hargan on this site.

On 6/17/2026 Dawn Boitnott (NWT POP UP SHOP) had this to say:
They ALWAYS do the best work around! Love our new windows and love their work! Guys were efficient, friendly and did excellent clean up!! Highly Recommend!!*****

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 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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