What Is An Inverted Roof System

This in turn is secured by a layer of ballast or paving or a green roof.

What is an inverted roof system. An inverted or protected roof is a type of flat roof construction in which the waterproofing layer is placed below the insulation. Inverted roof membrane assembly irma can be constructed. It is therefore essential the insulation layer is rot proof and durable. 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.

Inverted roof systems are also referred to as upside down roof assembly. In this issue the investigations team explains how inverted roofs work outlines their benefits warns of a possible cause of problems and describes an unusual investigation. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. 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.

Inverted roof designing buildings wiki share your construction industry knowledge. Inverted roofs have their waterproofing layer beneath the insulation instead of above it as in other forms of roofing. However deferring a roof replacement by 10 years can save hundreds of thousands of dollars. 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.

What is an inverted roof. The system is also referred to as a protected membrane or upside down. The average life of a roof system in north america is around 16 years and the depreciation period for a commercial roof 39 years. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.

In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly. In an inverted membrane system the coventional membrane arrangement is invereted or turned upside down. 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. The membrane is further protected by ballast overtop the insulation.

Whilst the inverted roof is a robust system the insulation layer does not benefit from the protection of the waterproofing membrane. These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as. Inverted roofs typically last longer than traditional ones.