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Pitched/Flat Roof

Pitched/Flat Roof

The system complies with the most stringent of standards – from baseline building regulations through to Passivhaus*. The system is suitable for most external finishing
options including metal, clay or slate tiling etc. All components for the system are available below.

The System Sheet will show you all the components required and which bits go where. Please note that to benefit from the BBA certificate all the system components specified must be used.



*NB. Any system designed by NBT as Passivhaus should be verified using the latest PHPP software to ensure the Passivhaus standard can be met. Passivhaus Store does not warrant any such system as being able to achieve the standard.


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Isolair is denser than other Pavatex products, increasing thermal mass on roofs ..

Starting at: £19.85 Inc VAT: £19.85

Pavatherm Combi

PAVATHERM-COMBI Multipurpose T&G Woodfibre Insulation Board which can be use..

Starting at: £7.56 Inc VAT: £7.56

Pavatherm Plus

Pavatherm Plus is a combination of Pavatherm and Isolair. Pavatherm effect..

Starting at: £14.77 Inc VAT: £14.77


Pavaflex, is a high performance, natural insulation manufactured from sustainabl..

Starting at: £18.54 Inc VAT: £18.54


Counter sunk, self-drilling and self-tapping fixings for timber and sheet steel ..

Starting at: £4.21 Inc VAT: £4.21

Pavatape 75 / 150

Butyl rubber tape for sealing PAVATEX-boards. Application For sealing exte..

Starting at: £15.18 Inc VAT: £15.18


Solvent-free standard primer for Pavatape75/150 and Pavafix 60. Application ..

£14.14 Inc VAT: £16.97

Pavafix SN Tape

Screw and nail-sealing tape. Application Screw and nail-sealing tape to pr..

£6.60 Inc VAT: £7.92

Pavafix Tape

Acrylic adhesive tape for sealing internal OSB/ply or membrane for airtightness...

Starting at: £12.96 Inc VAT: £12.96

Pavatape Flex

Elastic butyl rubber tape for sealing PAVATEX-boards and -membranes at penetrati..

£9.49 Inc VAT: £11.39