All Case Studies

Case Study

GoldSmith Street Norwich

Completed2018
ArchitectMichail Riches

The project

Project overview

GoldSmith Street Norwich is a Cygnum offsite timber-frame project. The project was completed in 2018. The project architect was Michail Riches. Key design features include 105 social housing units, a mixture of 45 houses and 60 flats all built to the rigorous Passivhaus. Cygnum’s timber-frame solution includes Cygnum Passive system featured a twin-wall sheeted on both sides, with a membrane on the inside forming the.

01

Challenge

Design Features

  • 105 social housing units, a mixture of 45 houses and 60 flats all built to the rigorous Passivhaus Standard
  • Seven terrace blocks arranged in four rows and bookended by three-story flats, the design exploits angled sloping roofs to maximise daylight throughout the development and prioritises pedestrians over cars.
  • Future maintenance has been minimised by designing flats whereby every flat has a front door onto the street, with its own staircase and lobby at street level- designing out all internal common parts.
  •  The design seeks to provide sunny, light-filled homes with very low fuel bills of approximately £150 per year. In the main, these properties will be socially rented.
02

Solution

Timber Frame Features

  • Cygnum Passive system featured a twin-wall sheeted on both sides, with a membrane on the inside forming the airtight layer.  The build-up featured an 89mm stud, and a second 67mm stud, fully cellulose-insulated with an overall wall thickness of 399mm, which is designed to be thermal bridge free.
  • The intermediate floors and roofs were factory assembled cassettes with the cellulose-insulated zone to the roof using 400mm engineered joists.
  • To achieve passive certification, we had to ensure that everything materials, detail design and factory quality control standards were to the highest level. Four key factors had to be addressed: U-values, airtightness, thermal bridging, and interior surface temperatures.

 

 

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