What Is An Inverted Roof Assembly

An irma system is the most common type of roof used on modern high rises today.

What is an inverted roof assembly.

These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as. In an inverted membrane system the coventional membrane arrangement is invereted or turned upside down. Extruded polystyrene xps is the most suitable type. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.

More generically others may categorize an irma or pmr system as built up roof system or bur. Some references may use the term protected membrane roof or pmr system. Ballast roofs are your typical inverted roof but using gravel to hold the roofing components into place. Benefits of inverted roofs.

Inverted roofs are typically assembeled as vegetative ballasted or plaza roofs. Explore each roof assembly in greater detail below or dig into the downloadable materials to learn more. Inverted roof membrane assembly. The insulation may be exposed to water so it should have minimal water absorption characteristics.

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 membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards. In an irma the system s insulation is installed above the waterproofing membrane instead of below. It s an enconomic method for extracting.

Best of the dow chemical co. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. 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. Inverted roofs typically last longer than traditional ones.

Protected membrane roof pmr in a protected membrane roof also known as an inverted roof membrane assembly irma the insulation is installed on top of the membrane.