Trinity Glass International designs and manufactures residential fiberglass exterior and patio doors through its Feather River Doors and Signamark product lines. Headquartered in the Pacific Northwest, the company describes its work as combining door design and production with a focus on reducing manufacturing waste and improving energy efficiency.
ENERGY STAR®
Trinity GlassTrinity Glass is a family-owned residential, commercial, and stained glass company offering custom-made glasswork and glass installation. Submitted source context states that its products are intended to meet structural glass needs and include windows and doors installed to manufacturers' specifications.TOLEDO, OH
GlassivoFrom its manufacturing hub in Kocaeli, Türkiye, and customer-facing operations in the United States, Glassivo makes architectural glass systems for residential and commercial spaces. Its work ranges from energy-efficient glazing to custom doors, including oversized insulated bifold systems designed to open broad connections between indoors and out. Glassivo also develops tailored decorative and architectural solutions, backed by a stated 10-year warranty.Astoria, NY
MasoniteMasonite designs and produces doors, a business the company says was founded in 1925 and built on the idea of transforming waste into useful materials. With approximately 10,700 employees worldwide and more than 60 locations, it makes residential doors intended to provide comfort, safety, security and convenience.MECHANICSBURG, PA
Crystal Pacific Window & Door SystemsFounded in 2012 by Thomas Chen, the founder of Crystal Window & Door Systems, Crystal Pacific is the Riverside-based West Coast member of the Crystal family of manufacturing companies. Its 116,000-square-foot facility serves residential and commercial customers throughout Southern California and beyond, producing energy-efficient vinyl windows and doors with automated manufacturing for large-scale projects.COLLEGE POINT, NY