Business Details
45 Years
experience
Your Trusted Partner for Premium Windows and Doors in Colorado
Founded in 1981 as a workers cooperative, Signature Windows + Doors has built a 40-year legacy of excellence in premium window and door solutions across Colorado. Our commitment to craftsmanship and customer service is reflected in our partnerships with world-class manufacturers like Marvin, Sky-Frame, and Rehme, ensuring cutting-edge products that meet rigorous performance standards. We specialize in new construction, whole-home replacement, and remodeling projects, offering tailored solutions from design consultation to expert installation.With in-house installers and a 7-year warranty, we prioritize accountability, structural integrity, and energy efficiency. Our team of 26 seasoned professionals, many with over four years of service, delivers precision through full-frame replacement methods that maximize durability and aesthetics. As a Colorado-based leader with showrooms in Denver, Boulder, and Basalt, we combine decades of expertise with a culture of integrity to transform residential and commercial spaces.
Services
New Construction
Whole Home Replacement
Remodeling
Full-Frame Replacement
Custom Windows
Doors
Energy-Efficient Solutions
Architectural Consultation
Project Management
Installation Services
Details
- Year established: 1981
Highlights and features
- We offer 40+ years of expertise in premium fenestration solutions.
- Our in-house installers ensure quality control from start to finish.
- Full-frame replacement method maximizes energy efficiency and durability.
- 7-year warranty covers all installed projects for peace of mind.
- Employee-owned culture fosters accountability and long-term client relationships.
What people say
Fantastic, top to bottom
Best we've reviewed
Pleasure working with them
Top-notch quality
Superior craftsmanship
Services
New Construction
We collaborate with architects and builders to select and install windows and doors for ground-up projects. Our solutions enhance energy efficiency and aesthetics while meeting structural requirements. From modern designs to timeless classics, we ensure flawless integration with your vision.
Whole Home Replacement
Our team manages complete window and door replacements, focusing on energy efficiency and comfort. With in-house installers, we address thermal requirements and structural integrity, transforming homes through precision installation that boosts property value and performance.
Remodeling
We provide tailored solutions for expanding, reimagining, or modernizing spaces. Our experts align products with architectural details and performance goals, ensuring seamless integration that enhances both functionality and design aesthetics during renovations.
Full-Frame Replacement
This method removes old frames to inspect structural issues, ensuring superior insulation and durability. By maximizing glass area and eliminating air leaks, we deliver long-term energy efficiency, enhanced structural integrity, and a polished finish for lasting value.
Custom Windows
We offer bespoke window designs from premium brands like Marvin and Sky-Frame. Our custom solutions cater to unique architectural visions, combining cutting-edge materials with timeless aesthetics to create durable, high-performance installations that elevate any property.
People
Gwnal Hagan
President
Gwnal Hagan leads Signature Windows + Doors with a focus on craftsmanship and customer-centric innovation, driving strategic growth while maintaining the company's cooperative values and commitment to excellence.
Ben Anastasio
Chief Operating Officer
Ben Anastasio oversees daily operations, ensuring seamless project execution and adherence to quality standards across all services, from design consultation to installation.
Bruce Wamsley
Director of Product Logistics
Bruce Wamsley manages product logistics with expertise in coordinating premium window and door deliveries, ensuring timely and efficient supply chain operations for client projects.
Melony Sebastian
Director of Business Development
Melony Sebastian drives business growth by fostering partnerships and expanding Signature's market presence while aligning with the company's core values of integrity and service.
Questions
What services does Signature Windows + Doors offer?
We specialize in new construction, whole-home replacement, remodeling, and full-frame window and door installations using premium brands like Marvin and Sky-Frame.
Do you provide warranties for your installations?
Yes, every project includes a 7-year warranty covering both product defects and installation quality for long-term peace of mind.
Which areas do you serve?
We serve Denver, Boulder, Basalt, and the Roaring Fork Valley, delivering premium fenestration solutions across Colorado.
What makes your full-frame replacement unique?
Our method removes old frames entirely, addressing structural issues and maximizing energy efficiency, durability, and aesthetic precision.
Are your installers employees or subcontractors?
All installers are direct employees, ensuring accountability, consistency, and superior craftsmanship throughout every project phase.
