Creating an inversion roof is a very original solution. Not only is it creates an additional useful area. So there is a lot of opportunities that can be implemented.

The advantages of the inversion roof

The main difference in the inversion flat roof from the usual is the location of the waterproofing layer and insulation. It is located directly on concrete ceiling. This became possible due to the appearance of solid extruded polystyrene foam.

The advantages of creating an inversion roof include:

• resistance to temperature differences, ultraviolet rays and freezing-defrost cycles;
• the waterproofing material simultaneously acts as a vapor barrier;
• the possibility of using thermal insulation re-(for example, during the reconstruction of the house);
• mechanical stress resistance;
• the likelihood of creating an operated design;
• long service life;
• low price of the construction of the inversion roof.

Basic design elements

In most cases, the arrangement of a flat roof occurs on the overlap of concrete. This process includes:

• creating a waterproofing layer;
• laying insulation;
• installation of the first geotextile layer;
• flooring a drainage mat;
• installation of the second geotextile layer;
• putting the soil.

The upper layer of the inversion operated roof can be represented by various coatings: a lawn, gravel or paving. It all depends on the power of overlapping the building. The design must withstand the proposed load.

Requirements for waterproofing and thermal insulation

At first glance, the device of the inversion roof will not cause special difficulties. Flooring materials is made on each other. No need to use any special tools. But, nevertheless, it is necessary to come up with all seriousness. The main reason is the complexity of the repair of such a roof. Therefore, it is necessary to thoroughly lay the laying of each layer.

This is especially true for waterproofing. When it is laying it is necessary to provide a small slope. Water should be drained from waterproofing material. As waterproofing, you can use:

• ruberoid;
• polymer films;
• bituminous mass.

The use of a polymer single-layer film involves performing additional work. There is a 5-mm layer of foamed polyethylene between concrete and it. This will not allow the appearance of damage on the film when it comes with a concrete surface.

With all the advantages of bituminous materials, they are not the best option when the device is flat inversion roof. This roof provides for the creation of a double layer of waterproofing.

The best material for these purposes is SVS-rubkeroid. It consists of components that prevent germination of grass roots and other plants.

The selection of insulation for the inversion design involves the use of moisture resistant material. The most common is extruded expanded polystyrene. His edges make such that the plates are put on the mustache. For the material characteristic are:

• minimal absorption of moisture;
• mechanical strength;
• preserving the initial size throughout the service life.

The insulation of the inversion roof can also be used polyurethane foam and foam glass.

Two original plane roof options

Very interesting options are the creation of gravel coating and greenhouses on the inversion roof. The first method of a flat roof device involves the formation of a ballast layer of gravel. With his weight, he presses all the roofing pie. In addition, this material:

• has good sound insulation properties;
• allows natural ventilation design;
• prevents the appearance of fire.

The only nuance - gravel should be washed. Dirt worsens the roof drainage.

Creating assemblies of inversion roofs from gravel provides:

• the use of the material of the fraction is 16-32 mm;
• the use of dense geotextiles;
• laying tracks with pavement tiles.

The 10-centimeter gravel layer is poured on geotextiles. In addition to high density, geotextiles must normally skip steam. Laying tracks from tiles is made on a small area. Otherwise, problems may occur with roof ventilation.

The development of landscape design made a possible device on a flat roof not only a green lawn, but also the real garden itself. Creating a greenhouse consists of such consecutive stages:

1. A drainage layer is placed on geotextile. It is made of gravel or special profiled plates. The drainage layer is designed to remove moisture in a funnel. The stability of the profiled plates is attached by filling their protrusions with a bulk material.

2. The second layer of geotextiles is attached to the drainage. His main task is to prevent drainage drainage. To create a roof with a greenhouse, it is recommended to use a structured propylene geotextile with a density of up to 200 g / m².

3. The soil pre-mixed with mineral fertilizers and clay gravel is stacked on the second layer of geotextile.

The size of the soil layer depends on the type of grown plants. It is:

• 10-15 cm - for moss and herbs that have a high regenerative ability;
• 15-35 cm - for herbs, shrubs and perennial colors that require periodic fertilizer and regular irrigation;
• 35-250 cm - for herbs, shrubs, colors and trees with a decent root system.

Video on the device inversion roof: