FiberCore Plus and UltraCore Plus

Vanguard double-hung and sliding windows and sliding patio doors use a pultruded fiberglass structural core for ultimate frame strength, called FiberCore Plus.  This fiberglass core coupled with a surrounding layer of UltraCore Plus, our exclusive polyurethane insulation, offers you a door system that is guaranteed to perform for a lifetime.

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Why choose JWS?

Licensed and insured - Replacement Windows Fully licensed and insured  
Expert installation since 1969 - Replacement Windows Expert installation since 1969
Every one of our installers have a minimum of 15 years of experience Every one of our installers has a minimum of 15 years of experience
We only work with high quality manufacturers Unlike our competitors, we work with several high quality manufacturers to give you what you want, not just one.
All products exceed Energy Star requirements - Replacement Windows All products exceed Energy Star requirements
All products are rated by the NFRC All products are rated by the NFRC
All brands have products that qualify for the Consumers Energy Rebatet All brands have products that qualify for the Consumers Energy Rebate!
All products pass a strict JWS 48 point installation check All products pass a strict 48 point installation check
No high-pressure sales tactics No high-pressure sales tactics. Our products and installation speak for themselves.

Free Estimate for your home improvement project!

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Get a Quote ASAP on replacement windows and doors

Testimonials

“I wanted to thank you for the excellent work your company is doing on our home. Both LeAnn and I very much appreciate the great amount of time you spent helping us choose the best type of window for each of our forty two openings. Even though we changed our minds several times, when the windows arrived every single one was the correct type and size.”

- Joseph Goldman

 

“I take a personal interest in seeing that all of my customers get the very best treatment from the very first time they experience our company. Feel free to contact me with any questions.”  

~ John Whalen, JWS President

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Replacement Windows 29240 Grand River Ave. Farmington Hills, MI 48336
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