Isolair Flat Roof System

NBT Pavaroof

NBT Pavaroof Flat Roofing System is suitable both for new build and for the refurbishment or upgrading of existing roofs. Pavaroof uses Isolair boards from Pavatex.

Isolair has higher thermal mass and density than many other roof insulation products, giving excellent overheating protection and acoustic performance.

It is also highly suitable for breathing building construction and the refurbishment of historic buildings

Pavatex Isolair logo
System Benefits
  • Full system support
  • Excellent thermal performance, with very low thermal bridging (y values)
  • Excellent windtightness
  • Excellent acoustic insulation
  • Excellent overheating control
  • Fully breathing construction
  • Full design and site support from NBT
  • All systems components from NBT
  • Robust and easy system to install
  • Tried and tested system, fully certified

System Application

Isolair Pavatex Pavaroof Flat Buildup

NBT Pavaroof Flat roofing system is for flat roofs with vapour closed unvented roof coverings of all sorts.

The Pavaroof Flat system comprises of square edged woodfibre (Isolair) boards over the decking in an unbridged layer, to provide a highly insulated roof both thermally and acoustically, with excellent summer overheating protection.

There are a number of flat roofing systems available from NBT, including breathing roofing systems, green roofs, and systems with different types of boards and different fixing methods. Please contact NBT for further details.

Click here to download a printable PDF of this Isolair system

Environmental Performance
fsc logo for Isolair natureplus certified
  • Carbon positive (locks up more than is used) and non toxic
  • Woodfibre Boards are over 95% waste
  • FSC Certified source
  • Zero Landfill - recyclable, compostable or used for thermal energy production
Pavaroof Performance

Pavatex Pavaroof U-Value Table

System Components
  • Insulation boards: Interlocking, waterproof Isolair boards (22, 35, 60mm)
  • Pavatherm Plus+ boards (60, 80, 100mm).
  • Tapes and Glues: Pavatape for exposed edges, valleys, hips, ridges, service penetrations etc.
  • Also special glues for board edges on pitches between 10°and 20°. On pitches over 20° board edges are not glued.
  • Fixings: A range of helical and screw fixings for different boards and roofing materials
  • Infill insulation: NBT provide natural insulation materials such as hemp, sheepswool and through sub-contractors cellulose
  • Plaster boards and paints: NBT can provide clay boards, plasters and trade environmental paints for ceilings

For more information on Pavaroof with Isolair, download the following. Please right click and 'save as'. If you have any problems downloading any information, please contact us for assistance:

Pavaroof Flat Basic Information Sheet

Isolair BBA Certificate

Pavatex Systems Fire Performance

Pavatex Systems LANTAC Certificate

Pavatex ISO 14001 Certificate