Irma Roof Assembly

Extruded polystyrene xps is the most suitable type.

Irma roof assembly.

More generically others may categorize an irma or pmr system as built up roof system or bur. Placed on top of hydrotech s monolithic membrane 6125 it offers protection from the harsh roof environment. Where irma and some people remember it by inverted roofing membrane assembly or it really means insulated roof membrane assembly. Russell right well prma the acronym i think these have been around probably 25 years or so is protected roofing membrane assembly.

Some references may use the term protected membrane roof or pmr system. Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards. An irma system is the most common type of roof used on modern high rises today. Inverted roof membrane assembly irma inverted roof membrane assembly irma offer superior protection of the roof membrane from foot traffic and mechanical damage.

Inverted roof systems are also referred to as upside down roof assembly. University of massachusetts amherst ma. 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. But the key word here is it s inverted.

The insulation may be exposed to water so it should have minimal water absorption characteristics. In an irma the system s insulation is installed above the waterproofing membrane instead of below. Inverted roof membrane assembly. This arrangement of roofing materials roof deck waterproofing membrane moisture resistant insulation is commonly referred to today as the protected membrane roof pmr or insulated roof membrane assembly irma.