Best Warranties
Illinois Energy Windows and Siding, Inc, is proud to have the most comprehensive warranties in the industry: Lifetime Warranties on both Labor and Materials.
Worthington Windows® True-Lifetime Warranty
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Illinois Energy Cedar Ridge™ Siding True-Lifetime Warranty
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CastleView Entry Door Warranty
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Customers: Update Your Warranty Info Here!

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Best Guarantees
Worthington Windows® 40% Plus Guarantee
Illinois Energy Cedar Ridge™ Siding 20% Plus Guarantee
Worthington Windows® & Illinois Energy Cedar Ridge™
Siding 45% Plus Guarantee
Guarantee Price Assurance Guarantee.
At Illinois Energy Windows & Siding, you can be assured once the work order has been completed, the price will remain the same.

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Rate Assurance
Illinois Energy is proud get you approved for the most competitive rates on your remodeling project. At any time before your project is completed, if you are able to get a lower interest rate through your own source of financing, you can choose to go with your own loan.

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