How do I protect my roof from the harsh Australian sun? Insulating your roof from sun damage is possible with a double roof system.

Lighthome reader Paul Morris from the Gold Coast wants to protect his roof from the harsh Queensland sun “so that air can freely circulate to stop the heat from the direct sun from even reaching the main insulated roof structure”. Ideally, Mr. Morris would like to make an informed decision about a cost-effective roof design that doesn't have to work against the extreme heat of direct sun and reduces the amount of insulation in the roof necessary while achieving a quicker cooling effect when the sun goes down.     Double roof systems Design expert and Architect, Shane Denman, recommends installing a double roof system as a possible solution. The idea of a double roof system is comparable to how a typical tent is designed, by using a fly over the main tent structure to give protection from the sun, rain and cold. “This is a basic passive insulation system which works with convection principals of cool air being pulled through by warm air rising, or trapping in warm air when the weather is cooler,” Mr. Denman said. “In principle, a double roof system with a substantial air gap and ventilation outlets at the highest point can be shut down in the cooler months to keep the warm air inside.” A double roof system would need less roof insulation than a conventional roof and the amount of insulation and type would need to be determined by a qualified professional in this field.

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