Inverted Roof Membrane Assembly Detail

In an inverted membrane system the coventional membrane arrangement is invereted or turned upside down.

Inverted roof membrane assembly detail.

Inverted roof membrane assembly irma systems are used in applications where the membrane requires protection from site specific hazards. Explore each roof assembly in greater detail below or dig into the downloadable materials to learn more. Inverted roof membrane assembly irma offer superior protection of the roof membrane from foot traffic and mechanical damage. More generically others may categorize an irma or pmr system as built up roof system or bur.

Liveroof global llc keywords. Some references may use the term protected membrane roof or pmr system. 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. Liveroof maxx green roof modules over inverted roof pmr assembly detail author.

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. Best of the dow chemical co. Irma can be referred to as an insulated roof membrane assembly. 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.

Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. The membrane is further protected by ballast overtop the insulation. This assembly has produced a variety of terms such as an upside down roof or inverted roof system and in 1968 a patent was issued on the insulated roof membrane assembly irma developed by j s. 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.

An irma system is the most common type of roof used on modern high rises today. Inverted roof membrane assembly. Protects roof layers from uv and mechanical damage inverted roofs are typically assembeled as vegetative ballasted or plaza roofs. In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly.

Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.