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Creating a seamless connection between indoor and outdoor spaces is a defining feature of modern New Zealand homes. Whether opening onto a deck, patio, or courtyard, homeowners and designers increasingly expect sliding doors to deliver easy access, refined detailing, and dependable performance – without compromise.
The LevelStep™ Sill from Altus® Window Systems answers this demand with a refined, lowprofile threshold solution, now available across both Ranchslider® and Euroslider™ sliding door systems. Designed and manufactured in New Zealand for local conditions, LevelStep™ enables smooth, flush transitions while maintaining the performance credentials required for residential and architectural projects across the country.
What is the LevelStep™ Sill?
The LevelStep™ Sill is a lowprofile sliding door threshold that removes the raised step traditionally associated with sliding doors. When paired with correctly detailed external decking or paving, it creates a nearflush transition between interior and exterior floor levels – enhancing accessibility, aesthetics, and everyday usability.
Why choose a LevelStep™ Sill?
1. Enhanced accessibility
By removing the step at the threshold, the LevelStep™ Sill helps eliminate trip hazards and makes day-to-day movement easier for everyone. It is particularly well-suited to:
- homes with children or older occupants
- households seeking future-proofed accessibility
- projects where universal design principles are a priority
2. Seamless indoor–outdoor flow
With uninterrupted floor lines and cleaner transitions, interior living spaces visually and physically extend outdoors. This creates a sense of openness and connection that supports contemporary open-plan living and outdoor-focused lifestyles.
3. Clean, architectural detailing
Level floors result in cleaner sightlines and a calmer, more refined finish. The absence of a raised sill enhances the overall design language of both modern and architectural homes, allowing other materials and details to take focus.
PLEASE NOTE: When installing decking or paving flush to the internal floor, suitable drainage must be incorporated between the joinery and adjacent surfaces to meet NZBC Clause E2 requirements.
LevelStep™ Sill with the Ranchslider®
The Ranchslider® has long been a familiar and trusted feature in New Zealand homes. With the addition of the LevelStep™ Sill, it gains a new level of functionality and refinement – while retaining the versatility that has made it so popular.
Key benefits of pairing the LevelStep™ Sill with the Ranchslider® include:
- compatibility across the full Ranchslider® range, including Ranchstacker™
- the ability to incorporate awning or casement windows into fixed panels for
secure passive ventilation - compatibility with airflow solutions such as Aluvent™ Passive Ventilation
This makes the Ranchslider® with LevelStep™ Sill a practical, flexible solution for a wide variety of residential designs, from family homes to multiunit developments.
LevelStep™ Sill with Euroslider™
For architectural projects prioritising clean lines, thermal performance, and refined detailing, the Euroslider™ with LevelStep™ Sill delivers a premium solution.
Because Euroslider™ panels slide externally, the system offers inherent advantages that align naturally with the LevelStep™ concept.
Key benefits include:
- improved weathertightness through external panel drainage
- enhanced thermal performance and airtightness for increased comfort
- cleaner interiors with no internal track to collect dirt or debris
- uninterrupted aesthetics suited to high-end architectural builds
Ventilation options such as Aluvent™ Passive Ventilation or opening sashes in sidelites and overlights allow airflow to be achieved without disrupting the streamlined design.
Designed for New Zealand conditions
The LevelStep™ Sill is designed and manufactured in New Zealand and made using low-carbon aluminium smelted at Tiwai Point, reflecting Altus® Window Systems’ commitment to sustainability, durability, and long-term performance. (EPD available on request)
A refined solution for modern sliding doors
Whether paired with a Ranchslider® or a Euroslider™, the LevelStep™ Sill delivers a carefully considered balance of accessibility, aesthetics, and performance. It transforms how sliding doors function and feel - supporting safer movement, cleaner design, and a stronger connection between inside and out.
For guidance on incorporating LevelStep™ into your next project, speak with your local Altus® Window Systems supplier or contact our architectural and technical teams for tailored advice.
