Designing a Passivhaus Within a Historic Landscape Setting
The architectural concept for Hellidon is rooted in its relationship with both the historic context and the natural environment. The building is partially set into the landscape, using the surrounding ground to provide protection from exposure while reinforcing its connection to the site. A south facing courtyard forms the heart of the home, acting as a sheltered microclimate and a key source of natural light.
The internal layout is organised around this courtyard, with living spaces and bedrooms all maintaining a visual connection to the outdoors. Glazing plays a critical role in this arrangement, enabling views through and across the building while ensuring natural light penetrates deep into the plan. The restrained material palette, including locally sourced stone and a green roof, further embeds the house within its surroundings.
Balancing Passivhaus Performance With Large Scale Glazing
Delivering large sliding openings within a Passivhaus envelope introduced significant technical complexity. The design required expansive glazing to maximise daylight and solar gains, yet these openings needed to achieve exceptional thermal performance and airtightness to meet certification standards.
The central courtyard arrangement meant that multiple rooms relied on sliding doors as both primary light sources and access points. This placed additional emphasis on thermal continuity, threshold detailing and weather performance. The inclusion of a wide multi panel sliding elevation also required careful engineering to ensure smooth operation, structural stability and consistent performance across its full span.
How the minimal windows® Sliding Door System Was Integrated to Resolve the Project Challenges
The minimal windows® sliding door system was integrated across the project to deliver both architectural clarity and Passivhaus level performance. The most significant installation is a multi-panel sliding elevation measuring 21m wide and 2.7m high, forming a continuous glazed connection between the main living spaces and the internal courtyard.
This system is configured as a three track, six panel arrangement, designed to open in multiple ways. Panels can slide from both the centre and the sides, allowing the living room and adjacent day room to connect flexibly with the courtyard depending on use. Despite its scale, the system maintains smooth operation, with individual glass panels weighing up to approximately 578kg.
In addition to the main living elevation, three further sliding door systems were installed to the bedrooms, each measuring approximately 2.7m wide by 2.5m high. These provide direct access to the courtyard while maintaining consistent detailing across the building.
All systems are triple glazed using low emissivity glass to achieve high thermal performance, with Uw values as low as 0.76 W/m²K on the main elevation. Thermally broken aluminium framing and careful integration within the building envelope ensure that the sliding doors support the airtightness and efficiency requirements of the Passivhaus design.
A Contemporary Passivhaus Defined by Slim Sliding Doors
The completed Hellidon home demonstrates how large-scale glazing can be successfully integrated into a Passivhaus without compromising performance or architectural clarity. The use of slim sliding doors for a Passive House enables the building to fully engage with its landscape, opening views, drawing in natural light and supporting a calm, connected living environment.
For architects and developers working on high-performance residential projects, particularly within sensitive or rural settings, Hellidon provides a clear example of how minimal windows® systems can be used to reconcile ambitious design intent with stringent environmental standards.
If you are exploring sliding door solutions for Passivhaus or low energy homes, our technical team can support with early-stage specification, detailing and performance integration.
