Inverted Roof Details

The system is also referred to as a protected membrane or upside down roof.

Inverted roof details. Inverted roofs typically last longer than traditional ones. Inverted roof systems a variation of a warm roof. This module is sponsored by radmat. 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. An inverted or protected roof is a type of flat roof construction in which the waterproofing layer is placed below the insulation. Inverted roofs have significantly lower maintenance costs than conventional low slope roofs thanks in large part to the insulation in the inverted assembly protecting the roof membrane from mechanical damage during and after construction as well as temperature extremes that cause stress. An inverted roof also referred to as a protected membrane or upside down roof is form of flat roof in which the waterproofing layer is beneath the thermal insulation rather than above it.

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. Waterproofing layer eg singly ply membrane. 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. The main difference between inverted roof systems and other roof systems is in the position of the waterproofing membrane.

Geotextile layer non woven polyester fleece separation layer this layer prevents a reaction between the insulation and the waterproofing layer. In an inverted membrane system the conventional membrane arrangement is inverted or turned upside down. An inverted roof also known sometimes as a protected membrane or pmr roof uses the same materials as a conventional roof but places insulation on the top of the membrane. Illustrations courtesy of american hydrotech inc.

Liquid applied polyurethane waterproof membrane. The upside down sequence means the deck is waterproofed first then insulated and finally finished with paving or ballast. A section of an inverted roof system using radmat s quantum vacuum insulated panel.