Passive‑Inspired Residential Renovation
This three‑bedroom residential renovation transformed a 1970s home into a contemporary, energy‑efficient dwelling. The scope included an extension of approximately 50 square metres, carefully integrated with the existing structure to support modern living while retaining the character and fabric of the original building.
The key objective was to improve thermal performance, comfort, and functionality while minimising demolition and waste. With a designer specialising in passive and sustainable housing, and a builder focused on energy‑efficient construction, the brief demanded building systems that could seamlessly integrate with the existing structure and support long‑term performance outcomes.

Renovation projects place unique demands on window and door systems. Unlike new builds, existing structures often require adaptable profiles, precise detailing, and solutions that can significantly improve performance without major structural compromise.
aluplast systems are particularly well-suited to these conditions. Our multi‑chambered PVC profile design supports strong thermal insulation, helping reduce heat loss and gain, a key requirement for energy‑efficient and passive‑inspired homes. At the same time, their structural stability allows for consistent proportions and clean sightlines, even when working within the constraints of an existing building.
The IDEAL 4000 system was selected for this project as it offers an effective balance of performance, flexibility, and design consistency. With a 70 mm profile depth and compatibility with modern glazing options, IDEAL 4000 supports improved thermal efficiency while remaining versatile enough for both retained openings and new extensions. Its adaptability makes it an ideal solution for renovations where window sizes, orientations, and wall conditions can vary significantly.
Finished in aludec Jet Black, the system also delivers a contemporary aesthetic with the durability required for long‑term residential use. For larger openings and connections to outdoor spaces, aluplast lift‑slide systems were incorporated, providing smooth operation and expansive glazing without compromising insulation or comfort.
For homeowners, this translates into improved year‑round comfort, reduced energy demand, and modern aesthetics. For builders and specifiers, aluplast systems offer reliability, consistency, and the confidence that performance requirements can be met across a wide range of applications, from modest upgrades to full architectural renovations.
Approximately 70 percent of the original structure was retained, significantly reducing material waste and embodied energy. A new roof frame was introduced and finished with a lightweight contemporary metal roof and extensive box guttering to suit the updated layout.
High‑performance aluplast IDEAL 4000 window systems in aludec Jet Black, manufactured locally by Thermotek, were installed throughout the home. These were paired with aluplast lift‑slide door to support a strong indoor‑outdoor connection while aligning with the project’s sustainability goals.
The completed renovation delivers a comfortable, energy‑efficient home that respects the original structure while meeting contemporary expectations for performance and design. By combining careful retention strategies with high‑quality aluplast window and door systems, the project demonstrates how renovations can achieve meaningful sustainability gains without compromise.
Manufactured by Thermotek, this Heathmont project highlights the suitability of aluplast IDEAL 4000 and lift‑slide systems for renovations, extensions, and passive‑inspired residential builds across Australia.
Fabricator - Thermotek Windows