Inverted Roof Detail

Benefits of inverted roofs.

Inverted roof detail.

Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. In an inverted membrane system the coventional membrane arrangement is invereted or turned upside down. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast.

The result of joining two or more gabled roof sections together forming a t or l shape for the simplest forms or any number of more complex shapes. In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly. Gable ridged dual pitched peaked saddle pack saddle saddleback span roof. 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.

This makes it the only material suitable and approved for inverted roof applications. A simple roof design shaped like an inverted v. Inverted roof membrane assembly irma offer superior protection of the roof membrane from foot traffic and mechanical damage. The green guide informs breeam ratings and here the biggest additional contribution will be the iso 14001 certification for the manufacture of the waterproofing and the insulation.

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 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 roof systems are also referred to as upside down roof assembly. The system is also referred to as a protected membrane or upside down roof.

Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards.