• Approved


  • Design
  • Manufacture
  • Construction


  • Swan Housing Group Modular Volumetric Building System

Swan Housing Group Modular Volumetric Building System

The system is based on Stora Enso cross-laminated softwood timber panels (CLT) factory assembled to form modular volumetric units to function structurally as external walls, internal walls, upper floors, and flat or sloping roofs, subject to the provision of suitable and adequate weather protection where exposed to the elements and additional fire protection, as necessary, to comply with local Building Regulations.

Durability Assessment: Minimum of 60 years

Limits of Scope

  • Maximum 3 storeys + roof
  • Bottom members in contact with foundations/sub-structure must be fully isolated from contact with moisture from the ground or external sources
  • Where suspended ground floors are used, adequate sub-floor ventilation must be maintained to the void below the ground floor. Consideration should be given to sealing the ground below the CLT floor in accordance with Building Regulation requirements to prevent ground moisture entering the void
  • Minimum 25mm drained and ventilated cavity behind external wall cladding
  • Where insulated external render or insulated brick slip cladding systems are intended, there must be a minimum 15mm drained and ventilated cavity behind the cladding (if no cavity, evidence to show that no detrimental moisture accumulation will occur – e.g., testing to MOAT 22, ETAG 004 assessment, Dynamic modelling such as WUFI hygrothermal modelling)
    CLT panels must be protected from direct or indirect contact with moisture
  • Nubuild must be contracted for the design, manufacture, supply and erection of the modules
  • Nubuild must confirm the suitability of all designs by others that could impact on the durability of the modules
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