Inverted Flat Roof Design

Double shell cold roofs are not commonly used for flat roofs due to the danger of condensation the complex structural design and the problematic breathability.

Inverted flat roof design.

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. Both scenarios would require safe general access and may lend themselves to a ballasted inverted or green roof design. Also different architectural styles will use the same type of roof. Find out more about inverted roof products.

High performance roof insulation suitable for use in a range of inverted roofs including green roofs and protected membrane flat roofs. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. In terms of the thermal design of a flat roof what are the options and the best practices of flat roof build ups. The advantages of inverted roofs are clear when compared to any other flat roof solution.

A ballasted roof is one where the roofing membrane is protected by means of either gravel or paving slabs. Benefits of inverted roofs. Because of the danger of condensation the complex structural design and the problematic breathability the double shell cold roof as a possible structural design solution for flat roofs is not commonly used. As the waterproofing is protected from mechanical damage uv degradation.

There are three recognised designs of flat roof construction. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss. The recognised flat roof build ups for best design practices are. Warm cold and inverted.

Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. In the case of a flat roof insulation is usually in the form of either a rigid board above the deck or a fibrous quilt immediately above the ceiling depending on the type of roof construction. In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately.