ProLine™ is an architectural cavity sliding door system designed to create a more refined finish around standard-height door openings.
Unlike conventional cavity sliders, ProLine™ has no visible head pelmet. The door sits close to the underside of the track, creating a slimmer, cleaner line above the opening while still accommodating standard-sized doors weighing up to 60kg.
It is an ideal choice when you want the minimalist appearance of Triline’s Zero Clearance system but do not require a full-height opening or heavy-duty 120kg capacity.
Architects and designers increasingly specify Triline’s Zero Clearance™ cavity system for its concealed, minimal-line appearance — but that level of detail has traditionally meant full-height doors and custom joinery, at a cost that isn’t always justified on a standard-sized opening.
ProLine60™ closes that gap.
It’s a cost-effective cavity sliding door system, purpose-built for standard-sized openings, that delivers the same pelmet-free, minimalist sightline as Zero Clearance™ — on off-the-shelf doors weighing up to 60kg. Where a project has both full-height and standard doorways, ProLine60™ lets you carry one consistent, clean-lined look through the entire dwelling, without upgrading every opening to a full custom system.
On residential and light commercial projects, it’s common to have a mix of door heights and openings: a statement full-height slider in the living area, alongside standard doors to bedrooms, bathrooms and studies. Historically, that meant a visible mismatch — full Zero Clearance detailing on the feature doors, and bulkier, pelmet-topped cavity units everywhere else.
ProLine60™ removes that compromise:
- Design consistency without the full custom spend — get the Zero Clearance™ look on standard doors, at a more accessible price point than a full custom unit.
- No pelmet, no visual break — the head detail reads clean and continuous with the rest of the joinery.
- Works with doors you already have access to — no need to order oversized or specially-railed doors; standard off-the-shelf doors up to 60kg drop straight in.
- Faster on site — simpler prep and quicker installation than a full Zero Clearance unit, which matters when standard doors make up the bulk of a project’s openings.
| Architects & Designers | Specify one consistent minimal-line language across full-height and standard doorways, without forcing every opening into a full custom detail. |
| Builders | Faster, more forgiving installation than a full Zero Clearance system — off-the-shelf doors, no need to rebate for bigger top and bottom rails. |
| Homeowners & End Users | An up-market, high-end finish on standard doors, at a more affordable upgrade from a standard cavity unit. |
How it works with modern architecture
Contemporary interiors increasingly favour flush, unbroken lines — walls that read as continuous planes, with doorways that disappear rather than interrupt. That’s the design intent behind cavity sliding doors generally, and it’s the reason concealed, pelmet-free head details like Zero Clearance™ have become a common architectural specification.
ProLine60™ extends that same design language down to standard-sized doors, so the minimal aesthetic doesn’t have to stop at the feature opening. It’s designed to complement full-height Zero Clearance™ units within the same project, giving architects a way to specify a unified look across a dwelling’s mix of door sizes — a practical answer to a genuinely common brief: “we want this minimal look everywhere, but the budget doesn’t stretch to full custom on every door.”
- Renovations and new builds where budget doesn’t allow full Zero Clearance™ throughout, but a consistent minimal look is still the goal
- Projects combining a full-height feature slider with standard-height doors elsewhere in the home
- Upgrading from a standard cavity unit (e.g. Phoenix) to a more architectural finish, without moving to a fully custom system
- Any standard-sized opening — up to 60kg door weight — where a clean, pelmet-free sightline is wanted
Door weight rating: up to 60kg Door clearances:
- Between track & door: 5mm
- Below door: 10mm
Single door opening
- Opening width (stud to stud): 2 × door width + 60mm
- Opening height (floor to trimmer): door height + 55mm + floor covering thickness
Double door opening
- Opening width (stud to stud): 4 × door width + 60mm
- Opening height (floor to trimmer): door height + 55mm + floor covering thickness
Configurations available:
- Single cavity sliding door
- Double cavity sliding doors
- Double corner meeting sliding doors
- Telescopic: double, triple and quad overtaking
Optional accessory:
- Soft Close
- Pocket door release
- No pelmet — matches the minimalist, clean-lined look of the Zero Clearance™ cavity unit
- Max 60kg door weight
- Soft Close Available
- Suits off-the-shelf doors — no oversized top & bottom rails needed for hardware rebates
- Quicker installation than a full Zero Clearance™ system
- Affordable upgrade path from a standard Phoenix-style unit
- Pairs with full-height Zero Clearance™ units for consistency across a dwelling
- Jamb finish options – architraves, square set, square stop, P50 shadow line, express reveals
Call up ProLine60™ on drawings or door schedules using the details below. Opening dimensions are calculated directly from door leaf size using the formulas in the specifications above.
Specification checklist:
- Door leaf size: width × height
- Door weight: confirm ≤ 60kg
- Configuration: single / double / double corner meeting / telescopic (double, triple, quad overtaking)
- Jamb finish: select from Cavity Jamb Options
- Wall Makeup: stud size / lining thickness
- Accessory: Soft Close, Pocket Door Spring Release (yes/no)
All Triline cavity sliders up to 2400 x 1200mm are certified to carry floor-to-ceiling tiles per the Prototype Test requirements of AS 1720 (Timber Structures — Design Methods).
Triline is a certified member of the Responsible Wood program (PEFC Chain of Custody).
