Inverted Roof Membrane Assembly

Shingled roofs when not conducted under roof.

Inverted roof membrane assembly. Benefits of inverted roofs. 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. 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. 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.

In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly. Inverted roofing systems are also durable and offer substantial protection for your building. Inverted roof membrane 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.

Invented by dow in the late 1960 s an inverted roof system uses dupont styrofoam brand xps insulation to protect the membrane helping improve the performance and longevity of the entire roof system. Metal roofs when not conducted under roof. Irma roofs protect the membrane from ultraviolet degradation and constant temperature changes. Inverted roof systems are also referred to as upside down roof assembly.

Roofs retaining moisture from installation over lightweight concrete decks. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. Inverted roof membrane assembly. The membrane is further protected by ballast overtop the insulation.

Inverted roof membrane assembly irma offer superior protection of the roof membrane from foot traffic and mechanical damage. The problematic roof was an inverted roof membrane assembly irma which consisted of a built up membrane installed over a structural concrete slab and topped by insulation. Some impossible to survey roof types include. Some references may use the term protected membrane roof or pmr system.

Inverted roofing systems are advantageous because they protect your roof from expansion and contraction caused by weather fluctuations. Irma can be referred to as an insulated roof membrane assembly. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. Inverted roof membrane assembly roofs.

This kind of roofing system is especially valuable in canada where the weather fluctuates rapidly and routinely. More generically others may categorize an irma or pmr system as built up roof system or bur. The system s construction is designed to offer greater protection for the membrane but if leaks occur and it does not drain well the top layer of insulation tends to float creating even bigger problems. 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.