Written By:
William Richards
Think about how many doors you touch or pass through from the time you wake up to the time you go to sleep. But doors are more than just functional thresholds. They do lots of other important things like regulate light and airflow, define space, frame views, and offer critical security and energy performance. From a grand entryway to a subtle courtyard transition, the right door enhances a building’s character while meeting the practical demands of the environment and occupants.
But how do you balance aesthetic vision with technical requirements? Architects today face a broader range of door types, materials, and performance criteria than ever before.
To help make sense of it all, the Window & Door Manufacturers Association (WDMA) offers detailed product guidance through their Window, Entry Door, and Skylight Standards. These standards provide clear benchmarks on performance, durability, and safety—ideal for professionals seeking common-sense solutions without sacrificing design intent.
Maintaining Standards (of Beauty)
Just like windows, doors are part of the building envelope and can significantly affect thermal performance. Whether you’re specifying a solid entry door or a multi-panel sliding system, U-factor and air infiltration should be top priorities.
Doors with insulated cores, thermally broken frames, and high-performance glazing can dramatically reduce energy loss. In colder climates, focus on low U-values to keep heat in. In warmer climates, look for options that minimize solar heat gain and resist warping under sun exposure.
Marvin’s line of doors, including their Elevate and Ultimate series, integrates thermally efficient fiberglass or aluminum-clad frames with insulated glazing and tight seals. These systems are engineered to meet or exceed Energy Star guidelines, while still offering flexibility in design and size.
Referencing WDMA standards ensures the products you specify meet tested performance criteria, providing peace of mind when balancing design with code compliance.
Photo Credit: Feldman Architecture
While solid doors remain common, many architects are choosing glazed doors to enhance daylighting and connect interiors with the outdoors. Large glass panels—used in pivot, sliding, or folding configurations—can help bring natural light deep into a space, reducing reliance on artificial lighting and improving occupant well-being.
In the Oak Pass Main House by Walker Workshop, a massive pivoting glass door blurs the boundary between inside and out. This sculptural entrance not only introduces light into the home’s main living space but sets a tone of openness and integration with the hillside landscape beyond.
Similarly, in the Palo Alto residence called “The Sanctuary” by Feldman Architecture, expansive glazed doors frame views of the lush backyard, transforming circulation spaces into indoor-outdoor moments of visual connection. These types of doors function not just as access points, but as key elements in a building’s daylighting and spatial strategy.
Doors also offer a chance to bring in fresh air—particularly when used in combination with operable sidelites or transoms. Whether swing, slide, or fold, operable glazed doors can be part of a natural ventilation strategy, helping to cool a space and improve indoor air quality.
Sliding and folding doors are particularly effective in milder climates, where indoor-outdoor living is desirable. Operability also adds flexibility: opening wide for gatherings, or just enough to allow a breeze.
Marvin’s multi-slide and bi-fold door systems feature precision hardware and robust weather seals, ensuring smooth operation without compromising on air infiltration resistance. When specifying, be sure to evaluate not just aesthetics and ventilation potential, but also how well the door seals when closed.
WDMA’s standards offer detailed classifications for air leakage and performance under simulated wind and water exposure, helping ensure durability even in operable units.
Doors are often among the most visually prominent architectural features. Their proportions, materials, and hardware influence both curb appeal and interior design language.
At Oak Pass, the custom pivoting door is both grand and minimal—an elegant slab of glass and wood that feels more like a rotating wall than a conventional entry. This is a strong reminder that a well-designed door can express scale, materiality and intent all at once.
Marvin and other leading manufacturers offer customizable options in wood, fiberglass, and aluminum-clad finishes—helping architects match doors to project palettes without compromising performance. Clean lines, concealed hinges, and oversized panels allow for bold, modern expressions without the burden of custom fabrication.
In the Palo Alto home, Feldman Architecture used slim-framed sliding doors to create a minimal, light-filled aesthetic that’s visually quiet and spatially generous. Aligning heads and sills across adjacent openings further enhances cohesion and order in the design.
Real Talk about Doors
Doors take a lot of abuse—from daily use to weather exposure. Material selection and hardware quality matter.
Material Selection
Wood offers warmth but requires regular maintenance or protection via cladding. Aluminum and fiberglass frames provide durability with lower upkeep and are more resistant to warping or swelling. For high-traffic or exterior applications, solid cores, reinforced panels, and weatherproof finishes extend service life.
Marvin’s Ultrex fiberglass, for example, resists corrosion, fading, and expansion, making it ideal for projects in harsh climates. When specifying exterior doors, pay close attention to WDMA performance ratings, including water infiltration, impact resistance, and cycle testing.
Photo Credit: Marvin
Photo Credit: Marvin
Installation
Installation quality is just as important as product durability. Even the best door will underperform if installed without proper flashing, alignment, or air sealing.
Total Cost of Ownership
Like all components, doors come with a range of price points based on size, material, operability, and customization. While sliding glass walls or pivot doors tend to be on the higher end, the value they add in terms of daylight, views, and user experience often justifies the investment.
Understanding the total cost of ownership—including energy efficiency, durability, and maintenance—can help clients see the long-term benefit of higher-performance options.
WDMA standards can assist in evaluating products not just by price but by tested performance, helping architects and clients make smarter, more transparent decisions.
Safety Considerations
Doors must meet critical safety requirements. These include fire ratings—especially for interior doors in multi-family or commercial buildings—impact resistance in hurricane zones or near foot traffic and egress standards.
Glazed doors must use tempered or laminated glass in areas with human impact risk. Sliding or swinging doors need hardware that’s accessible and reliable. In certain applications, ADA compliance may also apply.
WDMA provides detailed performance categories for structural integrity, forced-entry resistance, and safety glazing—all valuable references to ensure compliance without sacrificing design intent.
William Richards is a writer based in Washington, D.C., and Paris and the co-founder of Team Three, an editorial and creative consultancy.
Webinar: Understanding Window, Door & Skylight Certification
Understand the benefits of window, door and skylight certification and how certified products can enhance your projects.
Webinar: Understanding Window, Door & Skylight Certification
The Understanding Window, Door & Skylight Certification webinar is designed to help architects and remodelers understand the benefits of window, door and skylight certification and how certified products can enhance their projects.
