pant Road

I am currently quoting to replace a fibre glass flat roof.

The size is 5m x 5.2m.
Client have requested to install insulation into the roof to improve the thermal properties.
I would like to offer the correct thickness as close to what is required for building regs which would be 150mm if we use a PIR insulation.

I would like to enquire what is possible if we use Superfoil for this application or even a hybrid solution of superfoil and PIR.

Could you please let me know how we could install this and what would be needed.

Thank you

Andrew