Signamark® product lines contribute to the long-lasting value and beauty of homes throughout the United States. Signamark® exterior doors by Trinity Glass International set the benchmark as an industry leader in innovation, quality, and sustainability with a wide range of various door styles.

Innovation and Quality

We are deeply committed to homeowners, DIYs, contractors and our retail partners. Through our extensive research and development, we continue to design, innovate and develop premium quality doors. Whether you are building your dream home, remodeling or repairing your home, our state-of-the-art technology results in superior quality doors that perform for years to come.

Trusted Service and Support

We provide the best-in-class customer service and warranty coverage in the industry. Core to our company philosophy is personalized service to meet the highest business standards that our customers have come to expect, rely on and demand.

Sustainable, Green from Manufacturing to Production

In our designs, manufacturing process and production, we use state-of-the-art technology and processes to produce green, sustainable products that mean less waste, reducing costs and carbon emissions to result in a healthier environment. Many of our products are ENERGY STAR® certified, which means they exceed the minimum energy efficiency criteria for the climate region you live in.

Community Minded and Driven

Headquartered in the Pacific Northwest, our community service has its roots in our family-owned philosophy of neighbor helping neighbor. We have sponsored events on behalf of World Vision and Mary Bridge Children’s Foundation and supported the local Boys and Girls Clubs of America.

Moreover, we care for the environment around us, including the Western Blue Bird. Started by wildlife biologists on nearby Fort Lewis, the Western Bluebird project installs bluebird nest boxes in this important habitat area. Down to just one breeding pair in all of Western Washington during the 80s, a core population of several hundred Western Bluebirds can now be found again in this portion of their native range as a result of these cooperative local efforts. We are proud to have played a small part in continuing these efforts.