Your Delaware Commercial Window Installation Experts
- Locally Owned and Operated
- Competitive Pricing
- Guaranteed Workmanship
Your Delaware Commercial Window Installation Experts
- Locally Owned and Operated
- Competitive Pricing
- Guaranteed Workmanship
Superior Commercial Window Installations For Your Delaware Business

When it comes to your Delaware business, every detail matters—especially the windows that greet your customers and employees every day. At Grand Exteriors, we specialize in top-quality commercial window installations that not only enhance the aesthetics of your property but also provide superior energy efficiency and durability. Whether you’re upgrading outdated windows or starting a new project, our team of seasoned roofing professionals in Delaware ensures a flawless installation experience from start to finish.
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Commercial Window Installation Services We Offer
Aluminum Windows
Lightweight yet sturdy, aluminum windows offer excellent durability and a sleek, modern aesthetic. These windows are ideal for businesses looking for low-maintenance solutions without compromising on style.
Vinyl Windows
Energy efficiency meets affordability with our vinyl windows. These windows are designed to lower your energy costs and withstand the test of time while looking great on any commercial property.
Fiberglass Windows
If you’re seeking strength and resilience, fiberglass windows are the answer. These high-performance windows handle extreme weather conditions and maintain their integrity and beauty for years.
Wood-Clad Windows
Combine the classic charm of wood interiors with the low-maintenance benefit of durable exteriors. Wood-clad windows add a touch of elegance and warmth to your commercial space.
Storefront Windows
Make a lasting impression with our custom storefront windows. They’re designed to highlight your brand while offering exceptional security and energy efficiency.
Double-Hung Windows
Classic and versatile, double-hung windows feature two operable sashes for flexible ventilation and effortless cleaning. An excellent choice for balancing tradition with practical functionality.
Casement Windows
Casement windows open outward with a simple crank, offering excellent ventilation and unobstructed views. Perfect for businesses looking to optimize both airflow and aesthetics.
Awning Windows
Awning windows open from the bottom, making them a durable and weatherproof solution. They’re ideal for maintaining ventilation, even during light rain.
Fixed Windows
For businesses that value natural light and bold architectural statements, fixed windows offer the perfect solution. With no moving parts, they provide a sleek, modern appearance and energy efficiency.
Grand Exteriors: Your Windows, Done Better
At Grand Exteriors, we bring decades of expertise to every project. Known for our commitment to craftsmanship and unparalleled customer service, we deliver window solutions designed to meet the unique needs of your business.
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Allison Winser2025-01-11Trustindex verifies that the original source of the review is Google. Grand exterior did quality work on our new roof. Very happy customer. Finished in a timely manner and explained everything about the process. Clean up after was also very good. Thank you! A++ Colleen O'Brien2025-01-10Trustindex verifies that the original source of the review is Google. Great experience from estimate to completion of project. Would recommend and use again. Loretta Wolf2024-12-13Trustindex verifies that the original source of the review is Google. I can’t say enough how great Grand Exteriors was! They worked with my insurance and explained the whole process. When the crew came out they were very careful and did a great job cleaning up after the installation. Everyone was so friendly and easy to work with. I wish all repairs went this smoothly! Our roof looks great and I rest easy knowing with their repairs and upgrades that my roof is better than ever. Thank you all so much! Brian Risko2024-09-29Trustindex verifies that the original source of the review is Google. Rob and his construction crew did a fantastic job. I was very pleased with the quality of work. They were very accommodating and the odd items I needed them to address was not a problem. I would highly recommend Grand Exteriors to anyone looking for a new roof! Julia Dieter2024-09-11Trustindex verifies that the original source of the review is Google. Every part of the process with residing our house was smooth, timely, and efficient. Kyle and Rob are both extremely knowledgeable and professional. Upon having them come out for an estimate it was immediately apparent that they had the confidence to carry out the job. I would hands down hire them to do another project when the time arises. From start to finish they kept us up to date on everything and their team was amazing as well. We are so happy with the result! Thank you! I have attached before and after pictures below We opted to have NewTech wood installed Out of all the estimates that we had (which were about 4) Grand exteriors was the only company that was familiar with the product we wanted to install. Fran Dwyer2024-08-01Trustindex verifies that the original source of the review is Google. Owners Rob and Kyle along with their multiple teams not only delivered on the work schedules they committed to but exceeded our expectations on the work being completed. Their installation teams experience and knowledge showed right at the start of the each of our three projects. We had two roofs replaced, complete siding replacements, and twenty new window replaced. The crew provided daily cleanups, provided a end of day update, and provided the next day expectation of work to be completed. Owners Rob and Kyle were very hands on with management of the project and provided clear and decisive expectation as well. I highly recommend Grand Exteriors for your next Roof, Siding, Window, or Gutter project. Fran Dwyer Jennifer Hurd2024-08-01Trustindex verifies that the original source of the review is Google. Robert and his team were very professional. We had an urgent and unique situation about our roof and they went out of their way to help us-replacing our roof as quickly as possible. Upfront transparent pricing. They were organized and smooth about installation. Documented and explained the process to me as they went along. I highly recommend this company. Chelsea Astanova2024-07-23Trustindex verifies that the original source of the review is Google. On behalf of Mercer Sydell Dental, Grand Exteriors provided a very pleasant, efficient experience when they came to evaluate a leak in our roof. We would highly recommend! Chaz Schmitt Jr.2024-07-22Trustindex verifies that the original source of the review is Google. Great job. Excellent price. They showed up when they said they would and finished the job on time. I would recommend these guys to anyone.