Window and Door Replacement, and Building Supplies

Big L Windows & Doors sells only the finest quality window and door replacement products in the industry to our valued customers in the western New York and greater Buffalo area. With names such as Marvin, Integrity, Restorations and Therma-Tru, Big L is your best choice for cutting edge window and door replacement. Our expansive product selection offers unmatched beauty, state-of-the-art technology and excellent durability. No matter what the project, we have the options and styles to fit your project.

Infinity from Marvin Windows and Doors

Infinity® from Marvin Windows and Doors is a line of fiberglass replacement windows and patio doors designed by the experts at Marvin Windows and Doors. Created for the homeowner who wants low-maintenance, energy efficiency and traditional beauty, all Infinity products are sold by local window replacement experts as a complete, installed package to provide you with a high-quality, hassle-free experience.

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Restorations Innovative Window Systems

Manufacturing innovative, high-performing windows has always been a mission of Sunrise Windows, and the Restorations Innovative Window Systems line of products is an outcome of this mission. Our unique narrow-line window design emulates the look of traditional windows. Energy efficient and maintenance free, we married PVC with Fiberglass and created a material called FiberCore – an all-new way of making a window.

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Marvin Windows and Doors

Marvin Signature Collection from Marvin® Windows and Doors has cultivated a worldwide reputation as an industry leader in product innovation, energy efficiency and progressive manufacturing techniques. With superior value, expert craftsmanship, the highest quality materials and and service, only Marvin offers unmatched design flexibility with made-to-order windows and doors — and the industry’s most extensive selection of customization options.

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Integrity from Marvin Windows and Doors

Marvin Essential Collection from Marvin® is made with Wood-Ultrex® pultruded fiberglass, a material patented nearly 20 years ago when Marvin® pioneered the fiberglass windows and door category. Marvin Essential has led the category ever since with a commitment to a product that is tough, smart, long lasting, and worry-free. Previously known as Integrity Wood-Ultrex.

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