The type of flat roofing insulation you use for your project will depend on whether you have a warm or cold roof design. Most projects benefit from warm roofing design, where a PIR insulation board is installed beneath the membrane directly above the roof deck. This allows the heat to remain stable and requires no additional ventilation.
Book your insulation check at Permaroof Kent and let us give you an honest assessment of your current system to see if you comply. We can guide you through your options if you need any improvements.