Inverted Roofing Details

Simply defined as a type of roof construction where the waterproofing layer lies beneath the insulation instead of above it as in other forms of roofing inverted roofs ensure that the complete roof construction including roof covering is kept at warm temperatures during winter months and at moderate temperates during the summer months.

Inverted roofing details.

Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation. The system is also referred to as a protected membrane or upside down roof.

Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as multiple hail events. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast.