25% Off Doors - Special
Ready to upgrade your home's curb appeal and energy efficiency? Now is the perfect time! For a limited time, Illinois Energy Windows & Siding is offering 25% off premium exterior doors—expertly installed by our award-winning team.
Whether you’re replacing old, drafty doors or giving your home a fresh new look, this special offer makes it easier and more affordable than ever. With thousands of successful projects since 2002, we’re Chicago’s trusted choice for quality and value.
- 25% Off All Exterior Doors
- Energy-Efficient Options
- Professional Installation
- Top-Rated Local Service
Don’t miss your chance to save big on this essential upgrade. Claim your 25% discount today—call now or fill out the form to schedule your free consultation!
Illinois Energy Windows & Siding Reviews
Brett B.
4 Months Ago
We recently had our front door replaced. We had a great experience from the initial sales to the installation. We had previous quotes from another local company, that we had used in the past, and Illinois Energy Windows and Siding not only outbid them significantly, but also offered a better customer experience. We highly recommend them!
Danielle C.
1 Month Ago
We were very satisfied with the process of getting our new windows installed. Everything went very smooth and easy from the first meeting until the install. We will definitely be using them again on future projects!
Daniel R.
1 Week Ago
We are very pleased with our new windows from Illinois Energy. We equally were pleased with the team at Illinois Energy. They were easy to work with by being helpful and responsive. We have a historic home with original windows and James took the time for us to understand the process and even came out separately with pieces so we could see some options on the window before making a final decision. Installation was done quickly with total clean up before they left. Great follow up to ensure we were completely satisfied. Would definitely recommend them and wouldn’t hesitate using them for future needs.
Gerald R.
1 Month Ago
House was in need of updating. Called and got a great price for high quality siding. Reps were professional, workers were amazing. They were neat and very respectful of property. House looks like new and am sure the $value went up. So satisfied to have this done.
*Offer expires 05-31-2026. Restrictions Apply. Minimum purchase amount $5,000. Not valid with any other offers, previous purchases, or previous price freeze programs. Door Savings based upon purchase of siding or doors at normal list price. Promotions valid during initial estimate process. Illinois Energy has one of the longest warranties in the industry. However, that does not mean there are not some limitations. Please ask to see applicable product warranty certificates for any specific limitations. This advertisement will not serve as our warranty. Financing is subject to credit approval and completion of finance documents. Interest free options would have financing interest accruing during promotional periods. Interest is waived if paid off in full during the promotional period. Illinois Energy Windows & Siding Inc. is neither a broker nor a lender. Financing is provided by third party lenders. Terms and conditions arranged are directly between the customer and such lender.
Premium Entry and Patio Doors, Expertly Installed
Our large selection of doors makes it easy to find options that complement your home.
Entry Doors
We’ll help you choose entry doors that check every box for beauty, security, and energy efficiency! Experience the benefits of premium doors that are expertly installed.
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Patio Doors
Create a smooth transition from the interior of your home to the outdoor living areas. Our patio doors are energy efficient, stylish, and surprisingly affordable.
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French Doors
Our high-performance doors let you enjoy the classic look of French doors while also improving energy efficiency. Choose from several finishes to find the look that’s right for your home.
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Atrium Doors
These doors look exactly the same as French doors, but only one panel is operable. As is the case with all of our doors, we provide flawless installation for a durable result.
Get a QuoteThe Best Products and Expert Installation Backed by Industry-Leading Warranties
Premium Doors
We install doors designed specifically for this climate, so you’ll enjoy impressive results.
In-House Installers
Our entire team is highly trained and has the experience to complete even complex installations.
True Lifetime Warranties
We’re so confident in our products that we stand behind them with one of the best warranties in the business!
CastleView Entry Door Warranty
- 100% Non-Prorated Coverage on Parts and Labor for 20 Years
- Transferable to New Homeowners
- No Charge for Service, Parts, or Labor
- No Deductibles
- No House Call Charges
- No Parts to Be Shipped at Homeowner’s Expense
- All Door Components Including Insulated Glass Will Not Split, Crack, Warp, or Rust
- No Parts to Be Shipped at Homeowner’s Expense
- All Door Components Including Insulated Glass Will Not Split, Crack, Warp, or Rust
- No Condensation, Moisture, Dust, or Film Between the Insulated Glass Unit
- Painted/Stained Finishes and Hardware Warranted for 3 Years
- Our signature No-Nonsense Lifetime Parts and Labor Warranty, detailed below.
The Castleview Difference
High-Performance Fiberglass Facing: Specially engineered fiberglass door facings provide maximum protection and durability. It will not dent and resists splitting, cracking and warping. The unique deep woodgrain texture yields a natural wood-like appearance.
Perimeter Foam-Filled Weatherstrip: Tear-resistant jacket around a moisture-resistant foam for a highly effective, long life seal.
Polyurethane Core: Rigid polyurethane foam, meeting strict environmental guidelines, provides maximum thermal protection and dimensional stability.
Glass Motifs: Create a pattern of beauty with the most beautiful glass motifs available.
Internal Blocking: The lock area is reinforced to provide a solid mounting surface for decorative hardware.
Stile and Rail Detail: Replicates the appearance of a wood door with stile and rail detail. This design allows for vertical and horizontal woodgrain.
More Secure, Lower Heating & Cooling Costs
Each CastleView door from Illinois Energy Windows & Siding, Inc. carries an R-15 insulating value. That’s five times better than wood doors and up to two times better than many competitive doors. A continuous strip of compressible foam or TPE weatherstrip seals the top and sides of the door with the frame, eliminating air loss from around the door. The vinyl extrusion locks the skins together, but separates the exterior skin from the interior skin, eliminating the transfer of heat or cold through the skins.
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