Multi -foil Insulation material acts as good thermal barriers, and available in 38 mm thickness. Compared with the traditional insulation material, like glass wool, foam, rock wool, multi-foil insulation can give very high thermal barrier rate of 7.17M2.k/w. The material not only seals the roof from wind and dust by acting as an envelope, but also keeps the inside air flow smooth and provides a ventilated environment. Once installed, the roof will remain dry and warm in winter, preventing loft overheating in summer. Multi-foil insulation prevents heat loss through drafts and air leakage, and the outer reinforced aluminium foil can reflect natural sun radiant. The material is impervious to water and rain and through the foam and wadding, can arrest heat conduction within the material.