Energy Efficient. Beautiful. Built to Last. Installed by Cornerstone Restoration.​

Cornerstone Restoration provides expert window and patio door installation and replacement throughout Illinois. We work with trusted brands like Pella®, Andersen®, Marvin®, Quaker®, and Midway Windows, offering homeowners a full range of vinyl, fiberglass, and wood window options to match every architectural style and budget.

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Our team ensures every project meets manufacturer standards for performance, energy efficiency, and long-term durability — whether you’re upgrading for aesthetics, comfort, or resale value.

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Types of Windows We Offer

• Vinyl Windows

Low-maintenance, energy-efficient, and affordable — perfect for homeowners seeking a cost-effective, long-lasting solution.

 

• Fiberglass Windows

Stronger than vinyl and built to handle extreme temperatures without warping or cracking. Fiberglass frames provide premium insulation and modern appeal.

 

• Wood Windows

Timeless beauty and natural warmth that can be customized with stains or finishes to complement your home’s design.

 

Window Replacement Options

Full-Frame Window Replacement
Full-frame replacement involves removing the entire existing window — including the frame, sash, and trim — down to the rough opening. This method allows us to inspect and repair any hidden damage, install new insulation, and fit your new window for a clean, complete transformation.

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Pocket (Insert) Window Replacement
Pocket replacement keeps your existing window frame intact while replacing only the sash and hardware. It’s a faster, less invasive installation method that’s ideal when your existing frame is in good condition and you want to preserve interior and exterior trim.

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Patio Doors & Sliding Doors

In addition to windows, we install patio doors and sliding glass doors from Pella, Andersen, Marvin, Quaker, and Midway Windows.
Choose from sliding, hinged, or French patio doors in vinyl, fiberglass, or wood — all designed for smooth operation, tight seals, and energy efficiency.

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Every door is custom-fit to your home’s opening and installed with precision for long-term weather protection and lasting performance.

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Why Choose Cornerstone Restoration for Window & Door Replacement?

• Over 20 years of exterior renovation experience in Illinois

• Certified installation of Pella, Andersen, Marvin, Quaker, and Midway Windows

• Options in vinyl, fiberglass, and wood to fit any style or budget

• Expertise in full-frame and pocket (insert) replacement methods

• Seamless coordination with siding, trim, and flashing for watertight integrity

• Local, licensed, and insured for your peace of mind

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