Inverted Roof Membrane System

The membrane is further protected by ballast overtop the insulation.

Inverted roof membrane system.

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 membrane assembly irma can be constructed with virtually any type of roof membrane including bur modified bitumen and single ply systems. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.

Also known as a protected membrane or upside down roof inverted roofs employ insulation which can resist water absorption provide excellent thermal performance be unaffected by freeze and thaw cycles withstand surface traffic and be protected from uv and mechanical damage among others. 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. For inverted warm roofs a hot melt roofing system provides a seamless waterproofing solution that can easily adapt to upstands protrusions and other details. The system is also referred to as a protected membrane or upside down roof.

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. Whilst the inverted roof is a robust system the insulation layer does not benefit from the protection of the waterproofing membrane. Inverted roof membrane assembly irma systems are used in applications where the membrane requires protection from site specific hazards. 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.

Benefits of inverted roofs. 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. Irma roofs protect the membrane from ultraviolet degradation and constant temperature changes. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast.

The mariseal system inverted flat roof waterproofing method offers a simple build up waterproofing that features a protected waterproofing membrane and loose laying insulation boards. In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly. It bonds completely with the roof deck so if a small area is damaged any water ingress is confined purely to that area it cannot track underneath the waterproofing layer. Good insulation qualities and low thermal conductivity are required to ensure the low u value of the roof.