What is the difference between warm roof and inverted roof?

Inverted Roof Systems – A Variation of a Warm Roof The main difference between inverted roof systems and other roof systems is in the position of the waterproofing membrane. The ‘upside-down’ sequence means the deck is waterproofed first, then insulated and finally finished with paving or ballast.

What is an inverted flat roof?

An inverted, or protected, roof is a type of flat roof construction in which the waterproofing layer is placed below the insulation. This in turn is secured by a layer of ballast or paving, or a green roof.

How do you drain an inverted roof?

For inverted roofs, drainage should be provided at both the water control layer and waterproofing levels. Drainage outlets should be positioned at the low points of the roof, not just the roof edge.

Where are inverted roofs used?

Inverted roofs can be used for a wide range of applications, including extensive or intensive roof greening, gravel cover, or load bearing, either as a terraced roof or as a parking deck. This illustrates the range of requirements that the thermal insulation material must be able to meet.

What is Irma roofing?

Inverted roof membrance assembly (IRMA) systems are used in applications where the membrane requires protection from site-specific hazards. 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.

Why is roof inverted?

The great benefit of inverted roofs is that the insulation protects the membrane from extremes of weather, such as frost, UV exposure and the expansion and contraction that comes about from summer/winter temperature cycles, which can be as much as 80°C on some roofs.

What is inverted membrane?

In an inverted membrane system, the conventional membrane arrangement is inverted or turned upside down. Inverted roof membrane assembly (IRMA) systems are used in applications where the membrane requires protection from site-specific hazards.

What is an inverted roof membrane assembly?

Simply defined as a type of roof construction where the waterproofing layer lies beneath the insulation instead of above it — as in other forms of roofing — inverted roofs ensure that the complete roof construction, including roof covering, is kept at warm temperatures during winter months and at moderate temperates …

What is an inverted roof system?

Inverted Roof Systems. 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;

What is the best insulation for an inverted roof?

Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. This makes it the only material suitable and approved for inverted roof applications. Inverted roof applications are becoming increasingly popular for new construction projects due to a number of benefits that we think are important to highlight:

What is the best waterproofing membrane for an inverted roof?

A high-quality waterproofing membrane is also important to protect the below construction. The IKO Armourplan PVC membrane offers a robust solution for inverted roofs, and the next generation IKO Spectraplan Membranes in addition offer non-capillary construction to prevent moisture absorption.

What is the difference between a warm and a cold roof?

The roof construction determines whether the roof is referred to as a warm, a cold or an inverted roof. The main difference is the location where the insulation is installed with respect to the roof construction and the roof covering. This has a significant impact on the lifespan of the roof.