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Our Story

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Local Manufacturing – We manufacture our own windows locally in Chicago and you get to deal direct with the factory– no middle men, dealers or distributors.  That means short lead time, quick turn-around on emergency rush shipments; even same day glass replacement.  No one else can provide our level of service.

Experience - We've been in business for 10 years and have done major projects for both large and small General Contractors.  Our management team has well over 30 years of experience in the window business and our customer service department is professional, responsive and knowledgeable.

An Exceptional Product - Our commercial windows are far superior window to the typical cheap construction grade window.  Our vinyl extrusions are state of the art, supplied by REHAU, a world-wide leader in window design.  The owner will notice the difference and so will you.

Unmatched service, advanced manufacturing and a superior product. It's the best you can ask for.   

Newtec Windows and Doors was started over ten years ago by Jimmy Lei.  His philosophy is to provide a superior product with unmatched service and support.  With 35,000 sq. ft., five employees and some used equipment, Jimmy started a small manufacturing operation servicing contractors in the retrofit window market on the South Side of Chicago.  He has grown the business into a modern window factory, producing everything from aluminum storefront systems to high-end, state of the art, architectural grade vinyl windows.  Newtec now works with some of the largest General Contractors in Chicago, while still keeping a strong, loyal customer base of small contractors and walk-in business.

Jimmy has remained true to his starting philosophy of excellent service with a local flavor.  Newtec still offers same day glass replacement and the quickest turn-around of custom windows in the business.  This level of support is provided to the large projects too, and Newtec has become known for having regular representation from the factory at commercial jobsites with that same can-do attitude - solving problems and providing solutions to keep projects on time and under budget.

With Jimmy Lei driving the business, Newtec continues to grow.  The manufacturing facility is now over 110,000 square feet.  Another new 4 Point Welder was installed last year along with a CNC corner cleaner.  An upgraded glass line and new stainless steel intercept system were also installed.  A full wood grain foiling line is going in this summer, providing cost-effective upgrades to vinyl windows and more expansion is soon to follow.  

Whether it’s a multi-million dollar high-rise apartment building or a four window retrofit project, Newtec continues to offer the best products and the best service available.




What We Do

Products/Services Relating to Vinyl Windows
Products/Services Relating to Heat Tempered Glass Doors
Products/Services Relating to Sliding Doors
Products/Services Relating to Storefronts
Products/Services Relating to Metal Windows

Project Experience

Project Types:
New Alterations/Renovations
Project Size:
Up to $2,000,000
Gas Station
Hospital / Nursing Home
Church / Synagogue
Arena / Stadium
Club House / Community Center
Auto Dealership / Service
Non-Residential Building
Animal Hospital / Kennel
Fitness Center
Medical Office
Residential Building
Tract Housing

Service Areas

Preferred Brands & Manufacturers

Newtec Windows & Doors
Newtec Windows & Doors

Associations & Memberships

Member of AAMA (American Architectural Mfrs. Assn.) AAMA (American Architectural Mfrs. Assn.)
Member of ASA Chicago (Assn. of Subcontractors & Affiliates) ASA Chicago (Assn. of Subcontractors & Affiliates)
Member of BBB (Better Business Bureau) A+ Rating BBB (Better Business Bureau) A+ Rating
Member of Energy Star Energy Star
Member of EPA (Environmental Protection Agency) EPA (Environmental Protection Agency)
Member of EPA Lead-Safe Certified EPA Lead-Safe Certified
Member of NFRC (National Fenestration Rating Council) NFRC (National Fenestration Rating Council)