We are a full service dealer of Kolbe Windows and Doors


Who We Are

Kolbe Gallery Seattle is a full service dealer of Kolbe® Windows & Doors. The extensive showroom features a vast array of Kolbe’s artisan-quality windows and doors.

Our uniquely qualified staff members provide in-depth product knowledge, individual project detailing and quick turn-around on project quotes and proposals.

You can be confident that our experienced installers will respect your investment and ensure the excellent functionality and superior beauty of your windows and doors.

Our staff members can also provide technical support to architects, builders, contractors, and other construction professionals. Visit our Services page for complete details on the benefits of working with Kolbe Gallery Seattle.

Our Team

David Castiglione


As the founder of Kolbe Gallery Vancouver and Kolbe Gallery Seattle, David is responsible for the strategic focus and business performance for both companies. He is directly involved with quality initiatives, order processes, marketing strategies and technical delivery. He oversees the companies’ growth and defines the companies’ collaborative business objectives and staff development.

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David has been involved in the industry since he was 15 years old. Combining his education from the Architectural Major at SAIT and experience from the family company Westside Windows & Doors, David brings a wealth of knowledge and high level of professionalism to each project. David loves playing hockey and many other sports. He enjoys traveling with his wife Karen, entertaining family and friends, and dining out enjoying any cuisine.

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Doug Castiglione


As co-founder and President of Westside Window and Door in Calgary, Doug is responsible for the overall direction of the company. Doug has taken responsibility for the marketing of the products starting from the sales and sales support teams to the quality assurance and customer service offered by the installation and service teams.

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He is a founding partner in the company started in 1982 as well as being partnered in Kolbe Gallery Vancouver and Seattle with his son David Castiglione.

Not to mention, he is also an avid hockey enthusiast playing up to four times a week throughout most the year.

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Allyson Nichols

Design - Inside Sales

A California native, Allyson attended college at Cal Poly – San Luis Obispo, receiving a Bachelor of Architecture. Since earning this degree, she has moved across the U.S. and came back, finally settling in WA. All the while working in commercial architecture field and earning an Associate Degree in Paralegal Studies.

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Allyson is also a baseball enthusiast with the San Francisco Giants being her favorite team. She currently enjoys going with her husband and daughter, Molly, to see the Tacoma Rainers play.

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Our Showroom