429 mm thick insulated roof cassette available as part of a bespoke off-site manufactured building system. Integral ventilation channels prevent interstitial condensation in the deck.


  • Developed for schools, but applicable to most sectors.
  • Typically 2.4 m wide and up to 12 m long.
  • U-values between 0.18–0.10 W/m²K.
  • Safe working platform and rapid install.
  • Used with tiles, standing seam and single ply membrane.
  • Ventilated deck eliminates interstitial condensation.
  • 18 mm T&G OSB4 deck, 11 mm OSB3 soffit, EPS insulation.

Standard product features


439 mm.


  • 400 mm engineered timber joist.
  • 18 mm OSB4 T&G deck.
  • 11 mm OSB3 soffit.
  • EPS insulation.
  • Temporary weather protection membrane.
  • Safety decks in openings.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-60-90/410 Structural insulated roof panels
45-05-60/385 Structural insulated panels (SIPs)

Product specification

An important note about specifying



Innovare Systems Ltd


+44 (0)845 674 0020

Product reference

i-SIP Roof


[ ______ ]

Single ply membrane

[Not required]

Manufacturer details

Unit 3,
Siskin Parkway West,
Middlemarch Business Park,
Coventry, CV3 4PW
Tel +44 (0)845 674 0020
Fax +44 (0)845 073 0800
NBS Plus
NBS National BIM Library
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Company Overview Products (4) BIM (4)