Marvin Essential™ Fiberglass Windows

Streamlined Options for Easier Decisions

For a classic look that’s not overly complicated, Marvin Essential fiberglass windows from Big L Windows and Doors offer value-minded homeowners the gotta-have-it combination of durability, quality, performance, and design. You’ll feel at ease with the Essential collection’s clean lines and versatility, straightforward ordering process, and on-time delivery.

With Marvin Essential™ windows, you get:

  • Clean lines and a contemporary styling that blends in with any décor
  • Narrow profiles, revealing more glass than competitors’ windows
  • Low-maintenance durability
  • Strong, Ultrex® fiberglass, a 21st-century material exclusive to Marvin
  • Energy efficiency achieved with glass options for any climate
  • Easy-to-clean, smooth surfaces with grilles-between-the-glass
  • Six color choices for the exterior finish and three color choices for the interior
  • Streamlined options for an uncomplicated ordering process

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Your home is your sanctuary. And your home’s windows affect your outlook on the world. For clean, simple living, and light-filled spaces that make you feel lighter when you’re in them, look for windows with narrow sightlines, wide expanses of glass, features that make them easy to maintain and clean, and quality you can see and feel. You’ll find all of this in Marvin Essential windows.

Marvin Essential windows are carefully engineered from strong and durable Ultrex® fiberglass, which will not sag, warp or rot. This state-of-the-art protruded fiberglass material outperforms and outlasts vinyl, roll-form aluminum, and other fiberglass composites. In fact, the material has passed numerous, rigorous tests simulating harsh conditions to earn the American Architectural Manufacturers Association verification, AAMA 624, certifying that Ultrex is the best in class among fiberglass products. Ultrex fiberglass makes for beautiful yet virtually indestructible interiors and exteriors that stand up to rain, sun, wind, heat and time, so your windows will keep on looking beautiful and working beautifully for years.

And Marvin Essential windows function smoothly. No more struggling with a sash to let in fresh air and feel the warmth of the sun on your face. No more lugging ladders—these windows tilt in or can be removed easily to make cleaning a breeze.


While Marvin Essential patio doors are a great option for homeowners who want to keep things simple, you’ll still be able to coordinate them with your home’s interior and exterior décor.

Marvin Essential windows from Big L Windows and Doors are available in six exterior colors. Ultrex fiberglass provides a smooth and strong exterior finish, three times thicker than competitive finishes, that resists peeling, fading, cracking and chalking—and can even be painted without voiding the warranty. Inside, you can choose from a classic, traditional stone white interior, or more contemporary, on-trend bronze or ebony. Bronze and ebony interiors are available with the matching exterior finish; stone white interiors can be paired with any exterior. Marvin Essential window hardware comes in coordinating finishes.

Add character to your home with grilles-between-the-glass (GBGs) in a wide selection of patterns, such as the classic 6-over-6 rectangular grilles, cottage-style grilles at the top of the window, or praire-style grilles at the edges. GBGs mimic the traditional look of multiple glass panes while making your windows easier to clean and more energy efficient.

For energy efficiency, Marvin Essential windows come with dual pane glass glazing as the standard. Adding a combination of Low E coatings and argon insulating gas between the panes will give you the right thermal performance to keep your home comfortable in every season. Your Big L sales rep can explain which combination works best for Buffalo’s climate.