Built on Integrity and Building Envelope Science
Crestline Windows started with a simple observation: too many homeowners in Duncan were paying high utility bills due to failing window seals, low-grade builder sashes, and improper exterior installations. We established our company to provide rigorous, fenestration-certified installations that prioritize long-term thermal resistance over quick cosmetic fixes.
Protecting What Matters Most
Windows should provide natural daylight and clear outdoor views without sacrificing thermal comfort, structural resilience, or home security.
Rooted in the Duncan Community
Operating from 148 W Main St, we are proud to serve our Duncan neighbors and surrounding Spartanburg County communities with prompt communication, honest guidance, and dependable post-installation support.
Call +1 (864) 432-6520
148 W Main St, Duncan, SC 29334