We are a full service dealer of Kolbe Windows & Doors


Who We Are

Kolbe Gallery Seattle is a full service dealer of Kolbe® Windows & Doors, as well as other select building products. The comprehensive showroom features sophisticated displays of Kolbe’s artisan-quality wood, aluminum clad, and vinyl windows and doors.

Our uniquely qualified staff are here to answer questions.  Our staff members provide in-depth product knowledge, individual project detailing and quick turn-around on proposals.

You can be confident that our Installation Masters™ certified installers will respect your investment and ensure the excellent functionality and superior beauty of your windows and doors. Additionally, we have Kolbe Certified Technicians to provide full service capabilities on new and previously-installed Kolbe 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 Principal of both Kolbe Gallery Seattle and Kolbe Gallery Vancouver, 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. Oh, and he loves hockey.

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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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Doug Nasipayko

Fenestration Specialist

Growing up in Western Canada, Doug has been in the industry for over 38 years and quite recently moved back to the lovely Lower Mainland from BC’s Interior. With his love of architecture, he diverged his energy learning thru experience, service, design, construction practises & performance requirements becoming a Fenestration Specialist. Kolbe’s extensive product line lends Doug the flexibility to capture all the brilliant details drawn by the prestigious architectural community.

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Doug is a true hockey buff, soccer enthusiast, and cyclist and can hardly wait for winter skiing; In short, he’s a General in sports. These days as the weather gets warmer, you will see him and his wife enjoying the fresh air biking the Lower Mainland and Oh! He loves using the word “Prestigious”, which might be the word he would describe himself.

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Rebecca Liu

Technical Designer & Administrator

Rebecca graduated from the Architecture program from BCIT and is currently working on becoming a registered interior designer. She is equipped with the technical skills with respect to the industry, recognizes the importance of information organization, and is passionate about working out innovative, creative and fitting design details.

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She understands the high level of attentiveness to details required and strives in making procedures and any information handed down simplified and easy to understand. Rebecca loves to laugh, travel, design, read, and she remains a strong-faith Christian gal.

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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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Greg Evans

Installation/Service Manager

Originally from Lubbock, Texas, Greg had worked for one of the largest Kolbe windows distributor in the US since 2001. In 2008, he continued to be involved in the windows, doors and cabinetry industry while serving as a police officer. And in 2012, he became the same distributor’s operations manager. As the operations manager, Greg was in charge of the business’ servicing, installation and delivery teams in Austin, Texas until he and his family relocated to Washington in 2016.

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Being married with 3 children, Greg and his family look forward to continue their hobbies of outdoor activities, boxing and physical fitness in the milder climate Washington has to offer.

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Our Showroom