Upside Down Roof System

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.

Upside down roof system.

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

Illustrations courtesy of american hydrotech inc. Benefits of inverted roofs the great benefit of inverted roofs is that the insulation protects the membrane from extremes of weather such as frost uv exposure and the expansion and contraction that comes about from summer winter temperature cycles which can be as much as 80 c on some roofs. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. 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.

Inverted membrane roof systems.