EP1842979A2 - Heatable roof - Google Patents

Abstract

The heated flat roof, of a building, has a seal (5) and at least one surface area with an electrical heating element (4) under the seal between it and an insulation (3) or a support (1). It is a heated mat with metal grids or metal fibers as a web which can be rolled. The structure has at least one temperature sensor and the heated areas have different colors from other zones of the flat roof, for walking where snow and ice have been thawed. A protective layer (7) is over the seal and the roof structure also has a damp barrier (2) and fasteners (6).

Description

The innovation concerns a heated flat roof.

The innovation is based on the task of offering a particularly secure flat roof.

This object is achieved for the flat roof by the features of the protection claim 1. Advantageous embodiments of the heater are described in the subclaims 2-6.

The renewal flat roof according to the invention has at least one heatable area, wherein at least one heating element is mounted under the flat roof gasket. This ensures that remain on a flat roof no accumulation of snow and ice, as by the heating of the flat roof, a transfer into water and subsequent discharge of the water can take place.

The innovation can in particular in lightweight constructions, such as the construction of industrial or warehouses, exhibition or Sports halls, administrative and office buildings or supermarkets are used.

According to an advantageous embodiment, the heating element is formed as a heatable mat and may be formed in terms of surface dimensioning such that specifically targeted areas of the flat roof, which in particular tend to icing, are heated.

According to a further advantageous embodiment, the heating element consists of metal meshes or metal fibers, which are thermally conductive and thereby transport the resulting heat without great resistance.

According to a further advantageous embodiment, the heating element can be care-friendly in sheet form, whereby even large areas of flat roofs can be provided by rolling appropriate tracks quickly with heating elements.

By an embodiment with a temperature sensor, an automatic shutdown of the heating process can be set when reaching a predetermined temperature to achieve overheating of the flat roof and an energy-saving solution.

According to a further advantageous embodiment, parts of the flat roof are formed differently in color, so that color highlighted installation paths arise, which are heated, for example, which can be immediately recognized when walking flat roofs, even in snowfall, at which point committed the roof and where there may be a risk of collapse or break-in (eg by skylights).

According to a further advantageous embodiment, the heating element is mounted between the roof seal and the insulating layer of the flat roof, whereby it is achieved that over the insulating layer insulation of the flat roof takes place in the direction of the interior and above the insulating layer can take place heating of the respective surface area of the flat roof.

Fig. 1

eine erste Schnittansicht eines Flachdachs sowie

Fig. 2

eine weitere Schnittansicht eines Flachdachs.

The innovation is further explained by means of embodiments in the drawing figures. Show it:

Fig. 1

a first sectional view of a flat roof as well

Fig. 2

another sectional view of a flat roof.

1 and 2 show sectional views of flat roofs with supporting elements 1 (for example trapezoidal sheets), optionally a protective layer 7 on a seal 5, a vapor barrier 2 and fastening elements 6.

A directly or indirectly heatable heating element 4 (e.g., a mat of individual sheets of metal mesh) is used e.g. laid between the insulation 3 and the seal 5.

By targeted "heating" the surface temperature of the flat roof seal is raised to eg> 3 ° C, so that no Precipitation in the form of snow accumulations or ice floes remain on the roof.

An insert with cold roofs (without insulation 3) is given with laying of the heating element 4 between the support element 1 and 5 seal.

Precipitation in the form of snow becomes water on the heated roof surface, and in this state can be deliberately diverted via the existing gullies or gutters.

A heating element 4 laid over the entire area of individual webs of metal meshes or metal fibers can be brought directly to a voltage for "heating up". A control can be done with special temperature sensors.

The ohmic resistance of the heating element is used directly to generate heat by applying voltage.

A full-surface laid heating element 4 of individual webs of metal mesh or metal fibers can also be brought indirectly by heat conductors for "heating". The heat conductors are laid under the heating element 4. By the laying on of the heating element 4 (which forwards the heat) and the roof sealing a surface temperature increase is thereby made possible.

For the special running way marking, the heating element 4 can furthermore be provided with a specially dyed (eg in red) Partially laid "runway" so that just this area remains snow or ice-free.

In order to avoid partial surface static overloading, the heating element 4 can be laid part-way under the roof seal (for example in throat regions), so that precisely these subregions remain snow-free or ice-free.

Flat roof heating is operated by electricity, which can come from grid operation or direct use from a photovoltaic system (solar power).

The use of flat roof heating prevents the formation of snow and ice on flat roof surfaces and prevents static overload.

By using the flat roof heating system, the static snow load to be applied statically (analogous to the Scheelast zone division according to DIN 1055 / Part 5) can be set to zero.

A much cheaper construction (from a static point of view) is possible in the new building area. The advantages of the lower load approach can be transferred from the roof to the substructure)

A possibly prevented further use of the substructure in the case of refurbishment (due to greater insulation weight) can be avoided.

Due to the use of flat roof heating in existing buildings, the previously determined snow load (analogous to snow load zone division according to DIN 1055 / Part 5) can be used for the use of e.g. Photovoltaic systems are taken.

An additional use of the heating element 4 for passive leak detection is also conceivable and representable, as the resulting in combination with the heating "intelligent" flat roof.

1. 1. Erhöhung der möglichen Dachlast und Nutzung durch zusätzliche Anlagen (z.B. Photovoltaik-Anlagen),
2. 2. Begrenzung der Tieftemperatur in der Dachhaut (Verbesserung der Haltbarkeit) sowie
3. 3. Verbesserung der statischen Belastbarkeit des Dachpakets (Dachhaut und Dämmung).

Furthermore, the roof according to the innovation offers the following further advantages:

1. 1. increase of the possible roof load and use by additional plants (eg photovoltaic plants),
2. 2. Limiting the low temperature in the roof skin (improving the durability) as well
3. 3. Improvement of the static load capacity of the roof package (roof skin and insulation).

REFERENCE NUMBERS

1

carrying member

2

vapor barrier

3

insulation

4

heating element

5

seal

6

fastener

7

protective layer

Claims (6)

Flat roof for a building, wherein the flat roof has a seal and at least one surface area of the flat roof is heated by a heating element mounted under the seal. Flat roof according to claim 1, wherein the heating element is designed as a heatable mat. Flat roof according to one of the preceding claims, wherein the heating element consists of metal mesh or metal fibers. Flat roof according to one of the preceding claims, wherein the heating element is designed as a rollable path. Flat roof according to one of the preceding claims, wherein at least one temperature sensor is provided. Flat roof according to one of the preceding claims, wherein individual areas of the flat roof, which are provided in particular for the ascent, are formed differently in color to other areas of the flat roof.

Images