Inverted Roofing Details

Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards.

Inverted roofing details.

An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation. Inverted roof systems in this type of construction the principal thermal insulation material is applied on top of the weatherproof covering so that the complete roof construction including roof covering is kept at warm temperatures during the winter months and at moderate temperatures during the summer months. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. 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. 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. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure.