Profile: Jablite Limited produces expanded polystyrene (EPS) insulation products. Our insulation is manufactured from low lambda expanded polystyrene (EPS), which is lightweight and easy to handle. It is rot-proof & durable and will remain effective for the life of the building. It can be used above or below the damp-proof membrane. Flat roof inverted is a specially developed insulation that is laid over the membrane, thus insulating it from the worst of the weather. premium insulation is a cavity-wall insulation system designed to be incorporated into new masonry walls during construction to satisfy the relevant U-value requirements. The insulation boards have a fluted face and a tongued & grooved edge profile which is fully-interlocking, when in place the insulation fills the cavity and does not require special clips or wall ties.