Should there be an air gap between insulation and roof?
Should there be an air gap between insulation and roof? It is important that air is allowed to circulate between the roof covering and the insulation to avoid condensation - a gap of at least 50mm (2 inch) must be left between the insulation and the inside of the roof covering. Do you need an air gap for loft insulation? Whatever form the insulation takes, it is vital that there is an air gap of at least 5cm between the face of the insulation and the roof covering. To avoid condensation problems, this space must be well ventilated so vents...