Business Details
45 Years
experience
Premium Custom Windows and Doors in Colorado
Since 1981, Signature Windows + Doors has redefined industry standards for premium fenestration solutions. As a Colorado-based workers cooperative with decades of collective expertise, we specialize in custom window and door systems for residential and commercial projects. Our approach combines partnerships with global manufacturers like Marvin and Sky-Frame with in-house installation expertise, ensuring seamless integration of design, performance, and craftsmanship. With showrooms in Denver, Boulder, and Basalt, our team of 26 seasoned professionals delivers tailored solutions for new construction, whole-home replacements, and remodeling projects.Our 7-year average staff tenure and 40+ year legacy reflect our commitment to quality execution, evidenced by 33,440 units installed over the past decade. We maintain full project accountability through employee-led installations and a 7-year warranty, embodying our philosophy of taking responsibility at every stage.
Services
New Construction
Whole Home Replacement
Remodeling
Full-Frame Replacement
Expert Installation
Energy-Efficient Solutions
Custom Design Consultation
Structural Integration
Product Selection
Maintenance Support
Details
- Year established: 1981
Highlights and features
- We offer 40+ years of expertise in premium window and door solutions
- Our in-house installers ensure quality execution from start to finish
- We provide hands-on support for every project phase
- Our tailored approach understands unique project goals
- 7-year install warranty backs every project
What people say
Fantastic team
Top-notch quality
Best craftsmanship
Pleasure working
Superior results
Services
New Construction
We collaborate with architects and builders to select and install windows and doors for ground-up projects. Our expertise ensures energy-efficient solutions that enhance both performance and aesthetics while meeting structural requirements. From modern designs to classic styles, we integrate products that align with architectural visions.
Whole Home Replacement
Our team manages full window and door replacements, handling product selection through expert installation. With in-house installers and thermal requirement knowledge, we transform homes with seamless processes that improve comfort, efficiency, and style while maintaining structural integrity.
Remodeling
We provide tailored solutions for expanding spaces or modernizing homes. Our approach considers architectural details and performance goals to ensure perfect integration. With deep understanding of structural needs, we deliver renovations that enhance both functionality and aesthetic appeal.
Full-Frame Replacement
Our full-frame method removes old frames to the rough opening, addressing structural issues before installing new systems. This ensures superior insulation, structural integrity, and energy efficiency while maximizing glass area for natural light and improved views through precise, weather-tight installations.
Expert Installation
Our employee-led installation team guarantees quality execution using laser alignment and protective measures. We maintain accountability through every phase, offering ongoing support for maintenance and warranty claims while ensuring flawless integration with existing structures and architectural styles.
People
Gwnal Hagan
President
Gwnal Hagan leads Signature Windows + Doors with a focus on maintaining our 40-year legacy of craftsmanship and customer service while guiding future growth initiatives.
Ben Anastasio
Chief Operating Officer
Ben Anastasio oversees daily operations, ensuring our team maintains the high standards of quality and service that have defined Signature Windows + Doors since 1981.
Bruce Wamsley
Director of Product Logistics
Bruce Wamsley manages product logistics with expertise in coordinating premium window and door deliveries while maintaining our commitment to timely project execution.
Melony Sebastian
Director of Business Development
Melony Sebastian drives business growth while maintaining our core values, focusing on expanding Signature's reach while preserving our artisan approach to fenestration solutions.
Andrew Trigg
Project Manager
Andrew Trigg coordinates complex installations with precision, leveraging his extensive experience to ensure every project meets Signature's exacting standards for quality and performance.
Questions
What window replacement method does Signature use?
We specialize in full-frame replacement, removing old frames completely for superior energy efficiency, structural integrity, and maximum glass area.
Do you offer warranties on installations?
Yes, every project includes our industry-leading 7-year installation warranty covering both product defects and workmanship issues.
Which areas do you serve?
We serve Denver, Boulder, Roaring Fork Valley, Basalt, and surrounding Colorado regions with showroom locations in three major cities.
Are installers employees or subcontractors?
All our installers are direct employees, ensuring consistent quality control and accountability throughout every project phase.
What brands do you work with?
We partner with premium manufacturers including Marvin, Sky-Frame, and Rehme to offer cutting-edge window and door solutions.
