About Trimline Improvements

Established in 1989 Trimline Improvements is a local family owned and operated business specialising in the sale and installation of operable walls, acoustic accordion doors, concertina doors and shoji doors.

We are a major supplier to schools and other independent building companies involved in building and maintaining schools, government buildings, units and general housing.

We cover an area stretching from north side of Brisbane up to Bundaberg and west to Kingaroy.

We are local sales people, distributors and installers for Unifold Holdings P/L and Shoji Screens and Doors, who are both Brisbane Manufacturers.

It is reassuring to know that the person who sells the product to you, also measures and installs the product.

We can assist in deciding which product is the best fit for your job, and offer guidance selecting colours and finishes.

Our showroom is a great way to view our products, with full size doors on display. Alternatively, we have sample size product that we can bring on site when measuring.

Our suppliers

Unifold Logo


Trimline Improvements have been working with Unifold since 1989. Since having Unifold’s products recognised and accepted by local government departments we have had the privilege of introducing Unifold’s operable walls and accordion doors to almost every school in our region (from North Brisbane to Bundaberg) and beyond.

Our relationship with our supplier is of utmost importance to us, and this reflects in order accuracy, quality control, delivery times and the on-going service of products.

Shoji Logo


Trimline Improvements first became involved with Shoji products in 1993. As we were already supplying the Sunshine Coast region (and beyond) with internal room dividers, the opportunity to work with Shoji was a great way to diversify our product range and provide a stylish alternative for dividing a space.

We value our relationship with Shoji and are delighted to work together to offer a quality product to our customers.

Our clients