Case Study - The Greenhauses at Sulgrave Gardens, London

The Greenhauses

The Greenhauses offer an example of affordable Passivhaus level construction in a tight urban setting. The development includes a row of three-storey terraces (Block A) and two five-storey apartment buildings (Blocks B & C). Both Blocks A and B are Passivhaus certified.

The primary façade material is brick, complementing the surrounding architecture. To minimise the remaining construction thickness whilst achieving the required thermal performance and airtightness, the Kingspan TEK® Building System was specified for Block A. A 90 mm thick layer of Kingspan Kooltherm® K12 Framing Board was fixed outside the panel with an airtight membrane taped to its internal face.

On Block B, Kingspan TEK® Cladding Panels were fixed to the concrete floor slab using angled cleats. The build-up mirrored those in Block A with the airtight membrane sealed to the concrete frame and soffits with airtight tape.

Both build-up’s achieved a final external wall U-value of 0.10 W/m2.K, and the detailing, in combination with the Kingspan TEK® proprietary jointing system, ensured air loss was below 0.6 air changes per hour @ 50 Pa.

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