Upside Down Roof System

Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast.

Upside down roof system.

Inverted membrane roof systems. 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. The system is also referred to as a protected membrane or upside down roof. Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards.

The so called upside down roof is simply a rearrangement of the normal elements of a roofing system to try and overcome some of the disadvantages of the conventional arrangement. 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. Also known as a protected membrane or upside down roof inverted roofs employ insulation which can resist water absorption provide excellent thermal performance be unaffected by freeze and thaw cycles withstand surface traffic and be protected from uv and mechanical damage among others. Inverted roof membrane assembly irma systems are used in applications where the membrane requires protection from site specific hazards.

Illustrations courtesy of american hydrotech inc.