Our Story

Our products are available in all leading hardware stores in Tasmania and a selection of stores Australia-wide.

The idea for Triline Quality Door Systems was born in 1996 when founder and home builder, Stuart Colledge, noticed that there was no easy way to obtain pocket sliding doors in Tasmania. After a few years of extensive product research, design and development, Triline launched its first cavity sliders in a leading hardware store in Hobart. Over the next eight years our output increased steadily and by 2004 we outgrew our facilities. 2005 saw us expand to a larger premises and, as a result, we have significantly increased our production output.

With more space and the passion to go further, we overhauled and re-designed our cavity pocket system. After much refinement and consultation with our customers, the Phoenix™ cavity slider was formed. We continue to grow and improve our product range to give our customers more options and avenues for creative exploration in internal sliding doors. We also seek ways to better construct our cavity sliding doors to ensure our customers have the latest in architectural design and material performance.

“I started dealing with Triline many many years ago and found them to be not only one of the most innovative and professional companies to deal with but also one of the friendliest. Their products from day one were of a quality very high in the finish and design plus I never had one ever come back to the store due to being faulty! Fantastic people to do business with plus the most knowledgeable staff on all products. From the first phone call you know you have the right company to help with any product knowledge and most willing to go that extra mile for their clients.”

Frankie Clarke, Trade Manager, Becks Home Hadware – Launceston

Our mission is to satisfy our customers’ needs by providing quality products and support services that are tailored to our customers’ requirements.


We are committed to becoming Australia’s leading manufacturer of quality sliding and folding door systems, providing unparalleled products and service. We strive to serve our customers and staff by developing relationships based on our core values: Honesty, Accountability, Diligence and Passion.

Core Values

Honesty: We incorporate honesty and integrity in our actions and dealings with our customers, suppliers and staff

Accountability: We hold ourselves accountable for the products and service we provide and to one another within the organisation

Diligence: Providing quality products and service on time with attention to detail every time

Passion: Enthusiasm in what we do, our products and services are important to each team member