Client

Sheffield City Council

Architect

Sheffield City Council

Main Contractor

Kiers

Type of Development

The new Sharrow School is an urban school that has amalgamated an infant and junior school, providing over 500 places for children from birth to 11 years old.

Reason for Green Roof

Due to the minimal space that surrounded the school, part of the brief was to provide a three levell green roof creating a play area, outdoor classroom and rooftop nature reserve.  The school openly encourages flexibility within teaching areas and styles.  The reconstructed wildlife meadow on the uppermost roof area, which is utilised as a teaching terrace, gives children the opportunity to learn about their local plants and animals firsthand, turning what could have been a concrete classroom into a living lesson.

Type of Roof

Bauder Extensive Green Roof, Intensive Roof Gardens and Bio-diverse Roof Systems

Size of Green Roof

Intensive, Extensive and Bio-diverse:

1200m2 bio-diverse substrate system on a warm roof build-up

40m2 Lower level sedum blanket on a metal deck

Five intensive garden roofs, warm roof build-up's all finished with pavers and planters totalling 400m2

Build up of Roof

All Areas

Waterproofing Build Up

Vapour Barrier
Bauder VB4-Expal, 3mm thick heavy-duty torch-applied elastomeric bitumen membrane incorporating tear resistant aluminium lining to ensure complete impermability against water vapour.

Extensive Areas & Bio Diverse Areas only

Insulation
Bauder PIR flatboard insulation, fire resistant, zero ODP, highly efficient rigid urethane insulation, 120mm thick, thermally efficient, lightweight, fire resistant and zero ODP rated. The insulation has mineralised glass fibre facings on both sides to enable it to receive the torch-applied underlayer.

Intensive Areas only

Insulation
Bauder PIR tapered, fire resistant, zero ODP, highly efficient rigid urethane insulation, fully bonded to the vapour barrier in 95/25 grade hot bitumen. Laid in accordance with the Bauder scheme provided.

All Areas

Underlayer
Bauder G4E, 4mm thick, heavy-duty elastomeric bituminous membrane with 200g/m2 woven glass fibre reinforcement, which provides an extremely high tensile strength of greater than 1200N/50mm.

Capping sheet
Bauder Plant-E, root resistant layer, 5mm thick, chemically treated, root resistant capping sheet, SBS modified elastomeric bitumen capping sheet to FLL standards.

Green Roof Build Up

Relevant waterproofing layers to support the various types of green roof finishes.

Comments

Sharrows school is a building that has brought nature into an urban area, giving its pupils the chance to appreciate and learn about the environment firsthand. With webcams set within the green roofs, the children are able to observe the wildlife and create informative reports about their local flora and fauna.

Scala, a collaborative organisation of public sector architects and related professionals voted sharrows school as civic building of the year, 2009

Completion Date

2007