What is an inverted roof?

An inverted roof is where the layer of insulation is placed above the layer of concrete within a flat roof construction. The rainwater will drain through the insulation layer, which means that an extruded polystyrene based product must be used. The waterproofing finish will sit beneath the layer of insulation to protect the inside of the building, so naturally the rainwater will drain at this level. This roof works in a similar way to a warm roof set-up in the sense that having the insulation above the deck will ensure that the structure of the building is warm.

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Kingspan Insulation is a market leading manufacturer of optimum, premium and high performance rigid insulation products and insulated systems for building fabric and building services applications.