PIR insulation keeps Antarctic researchers cosy

The British Antarctic Survey has unveiled its new Discovery Building at Rothera Research Station, a purpose-designed facility optimized for extreme polar conditions that uses advanced polyisocyanurate (PIR) insulation as a key element in its environmental performance strategy.

Designed by Hugh Broughton Architects, the 3,000 m² structure replaces and consolidates legacy accommodation, laboratories, offices and utilities previously dispersed across the station. Given Rothera’s location on the Antarctic Peninsula – one of the most climatically challenging environments on Earth – maximizing thermal performance and reducing heat loss were primary technical goals of the project.

To achieve this, the building envelope incorporates 150mm-thick high-performance PIR insulation throughout its walls, roof and floor assemblies. These boards allow for tight thermal control with minimal wall build-up – a crucial advantage in a setting where internal space is at a premium and thermal bridging must be minimised. The material’s closed-cell structure also offers excellent moisture resistance, an important consideration in polar climates where condensation and ice formation can compromise less robust insulants. The foam boasts a minuscule U-value of 0.12 W/m²K, effectively preventing vapor transfer. This safeguards against water freezing within the insulation and subsequently damaging the cladding.

The architecture team combined PIR with triple-glazed units and rigorous detailing to create a continuous thermal barrier. According to the designers, the resulting envelope supports a stable internal environment year-round with reduced heating loads, helping the station meet stringent sustainability targets while enhancing occupant comfort in a site that regularly experiences temperatures well below freezing.

Beyond insulation, the Discovery Building embodies an integrated approach to polar design. Its elevated, modular form responds to shifting snow loads and local coastal winds, while interior layouts prioritise adaptability for scientific, residential and community use.

Photo: The Discovery Building will consolidate the function of 9 existing buildings on the station (© Hugh Broughton Architects)

Hugh Broughton Architects