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External Pitched/Flat Roof

External 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: £19.90 Inc VAT: £19.90

Pavatherm Plus

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

Starting at: £14.78 Inc VAT: £14.78


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

Starting at: £17.17 Inc VAT: £17.17


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

Starting at: £9.52 Inc VAT: £9.52

Pavabase Primer

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

£17.44 Inc VAT: £20.93

Pavatape12 - 12mm x 10m roll

Universal double-sided mastic tape for sealing PAVATEX-membranes overlaps and ed..

£9.52 Inc VAT: £11.42

Pavatex ADB, Breathable Membrane

External Breathable membrane with two-way integrated self-adhesive strips. Ap..

£138.00 Inc VAT: £165.60

Pavatex LDB 0.02 retrofit membrane

Vapour-open airtight membrane with two-way integrated self-adhesive strips. &nb..

£141.00 Inc VAT: £169.20