Business Details
34 Years
experience
Custom Aluminium & Vinyl Windows in Boston
Diamond Windows & Doors was established in 1992 by Tony Tseng, who brought decades of construction industry experience from Taiwan and New York City to Boston. Our company specialises in manufacturing custom aluminium and vinyl windows for residential, commercial, and historic restoration projects. We pride ourselves on combining traditional craftsmanship with modern thermally broken technology to meet strict building codes while preserving architectural aesthetics. Our expertise spans large-scale renovations to bespoke residential installations, supported by partnerships with leading brands like Velux and Ventana. With a 100,000 sq-ft facility in Dorchester, we offer made-to-order solutions using premium materials, including 100% virgin vinyl and high-performance aluminium extrusions.Our team provides consistent support throughout every project lifecycle, from design consultation to final installation. We maintain rigorous quality standards through continuous product evolution and third-generation vinyl window innovations. Our commitment to excellence is demonstrated through industry-leading warranties on finishes and energy-efficient performance. We serve architects, developers, and homeowners seeking durable, code-compliant window solutions that balance functionality with aesthetic integrity. Our growth reflects our dedication to meeting evolving client needs while upholding the principles established at our founding.
Services
Custom Aluminium Windows
Vinyl Windows
Historic Window Replication
Commercial Window Solutions
Window Accessories
Details
- Year established: 1992
Highlights and features
- Three decades of experience in custom window manufacturing
- Specialists in historic window replication with modern performance
- Partnerships with industry leaders like Velux and Ventana
- Made-to-order windows with 100% virgin vinyl and thermally broken aluminium
- Comprehensive support from design consultation to final installation
Services
Custom Aluminium Windows
Our thermally broken aluminium windows combine historic aesthetics with modern performance. Designed for commercial and residential applications, these windows meet strict building codes while preserving architectural integrity. Available in flush or overlap frame designs with AAMA AW performance ratings, they feature durable bronze hardware and custom panning shapes for historic projects. The 3-1/4" deep frame ensures structural stability while maintaining narrow sightlines for authentic replication.
Vinyl Windows
Third-generation vinyl windows engineered for durability and energy efficiency. Our 4000 series includes double hung, picture, and slider models with fusion-welded frames and multi-chambered construction. Standard features include true sloped sills, double weatherstripping, and 100% virgin vinyl for colour retention. Available with optional Argon/Krypton gas fills and triple-pane IGUs for enhanced insulation and noise reduction in residential applications.
Historic Window Replication
Specialist restoration solutions replicating classic steel and wood windows with modern materials. Our steel replica series maintains traditional putty bead profiles while incorporating thermal breaks for energy compliance. Custom extruded panning shapes and grid systems enable accurate historic detailing. We provide documentation packages for landmark commission approvals and offer field-measured solutions for challenging architectural shapes.
Commercial Window Solutions
Heavy-duty aluminium systems for commercial applications including storefronts, curtain walls, and institutional buildings. Our 8000 series CW-rated windows meet AAMA HC performance standards with thermally broken extrusions. The 9000 series AW-rated casement and picture windows feature sleek 2" frame depths suitable for industrial and modern commercial designs while maintaining weather-tight performance.
Window Accessories
Comprehensive accessory range enhancing functionality and aesthetics. Includes custom grid systems (SDL, GBG, TSDL), mullion configurations, and trim solutions. Our extruded receptor systems simplify installation while strap anchors ensure secure mounting. Available in matching finishes, these components maintain design continuity across projects while meeting practical requirements for ventilation, security, and thermal performance.
People
Tony Tseng
Founder
With construction industry experience from Taiwan and New York City, Tony established Diamond Windows & Doors in 1992. He has grown the company from a 20,000 sq-ft facility to a 100,000 sq-ft manufacturing centre in Dorchester, specialising in historic window replication and commercial solutions while maintaining family construction principles.
Questions
What types of windows does Diamond Windows & Doors manufacture?
We specialise in custom aluminium and vinyl windows including historic replicas, commercial-grade systems, and residential replacements. Our product range includes bay/bow windows, steel replicas, and thermally broken aluminium solutions.
Do you offer historic window replacement solutions?
Yes, we specialise in historic window replication using thermally broken aluminium that maintains traditional aesthetics while meeting modern energy codes. Our steel replica series preserves narrow sightlines and putty bead profiles.
What commercial window systems are available?
Our commercial offerings include AAMA AW-rated casement and picture windows (9000 series) and HC/CW-rated double hung windows (8000 series) with thermally broken aluminium construction for storefronts and institutional buildings.
Are your vinyl windows energy efficient?
Our 4000 series vinyl windows feature multi-chambered frames, fusion-welded construction, and optional Argon/Krypton gas fills. They meet Energy Star requirements and housing authority regulations for thermal performance.
Do you provide made-to-order window solutions?
All our products are custom-manufactured to exact specifications. We offer bespoke configurations, grid patterns, and finish options including 100% virgin vinyl and various aluminium coatings for both residential and commercial applications.
What areas do you serve?
While based in Boston, we serve clients across New England and the Northeast United States. Our custom manufacturing capabilities support both local residential projects and large-scale commercial developments.
