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The Best Home Windows – Learn About Us

Who We Are:

We have been working in the building and construction industry for over 30 years.   Enjoy peace of mind knowing that you are working with a fully insured and licensed North Carolina general contractor.  The Window Source of Eastern NC is locally owned and operated but have the resources of a national company.  This allows us to offer the best warranty in the business backed by the largest manufacturer of building materials in North America.

OUR PROMISE AND GUARANTEE is to treat every customer with the same care and consideration that we would our own family!


Hello, my name is Seth Casillas. My wife, Taryn and I first moved to Greenville in 2018 while she attended graduate school at ECU. We fell in love with Eastern NC and made the decision to stay here and raise our beautiful daughter. I look forward to building The Window Source to be of service to everyone in our community. 

Terry Willets- We have been blessed to live in and experience many states and cities since getting married in 1998.  The southern hospitality of Eastern NC won over our hearts…..So 13 years ago we decided to stay here permanently and raise our family of 10.  We look forward to serving our customers and community for many more years to come.

Peace of Mind Assurances:

Lifetime Warranty

All our Window Source products — new or replacement windows, entry and patio doors, and vinyl siding — are guaranteed by a limited lifetime warranty. Rest assured — you will only make this investment once! When meeting with our expert window consultants, ask for details.

Independently Certified NFRC Labels

So that you can compare with total confidence, all Window Source products come with voluntary National Fenestration Rating Council (NFRC) labels. You can rely on the labels and forget about all the sales gimmicks that you may hear from companies charging much higher prices. In fact, the US EPA relies on NFRC data to set its ENERGY STAR guidelines.

ENERGY STAR® Rated Products

At The Window Source of Eastern NC, our selection of products that utilize High Performance Glass all meet ENERGY STAR® guidelines for the Eastern North Carolina climate zone. You can rely on our promise of valuable energy savings when you choose our high performance glass for your new entry and patio doors and window replacements.

Join our growing family of satisfied Eastern NC area customers at The Window Source where America shops for replacement windows and doors.

Contact us for a free, no-obligation estimate.