Facade construction

1. A facade construction, comprising:

first thermal insulation elements having a first density arranged on a outer wall of a building of an outer wall of a building;

second thermal insulation elements having a second density arranged on the first thermal insulation elements and having a second density that is greater than the first density of the first thermal insulation elements;

a retaining device arranged on the outer wall of a building and holding the first and second thermal insulation elements on the outer wall of a building;

a protective layer that protects the second thermal insulation elements against environmental influences; and

an intermediate layer in the form of a plurality of mounting plates, the intermediate layer attached to and supported by the retaining device, wherein the second thermal insulation elements are arranged on the mounting plates and the first thermal insulation elements contact the outer wall of a building and on the intermediate layer such that the facade construction is substantially free from rear ventilation, wherein the plurality of mounting plates are attached side by side on the retaining device and form a continuous and planar mounting surface for the second thermal insulation elements and wherein the mounting plates are sandwiched between the first thermal insulation and the second thermal insulation.

2. The facade construction of claim 1 , wherein the retaining device comprises a plurality of spacers each having a first end and a second end and a retaining rail, wherein the first end is designed for fixing to the outer wall of a building and the second end is designed for attaching the retaining rail.

3. The facade construction of claim 2 , wherein the second end of each of the plurality of spacers has a slot into which the retaining rail is insertable.

4. The facade construction of claim 3 , wherein the retaining rail is held in the slot by a positive or non-positive fit.

5. The facade construction of claim 3 , wherein the retaining rail has a leg for introduction into the slot and a web that connects to the leg for attaching the mounting plate.

6. The facade construction of claim 2 , wherein the first end and second end of each of the plurality of spacers are connected by a central web with reduced thermal conductivity in order to avoid thermal bridges.

7. The facade construction of claim 6 , wherein a cross-section of the central web is substantially vertically oriented and the retaining rail is substantially horizontally oriented and held by the corresponding spacer.

8. The facade construction of claim 1 , wherein the first thermal insulation elements have a density between 90 kg/m3 and 20 kg/m3.

9. The facade construction of claim 8 , wherein the first thermal insulation elements have a density between 70 kg/m3 and 30 kg/m3.

10. The facade construction of claim 9 , wherein the first thermal insulation elements have a density between 60 kg/m3 and 35 kg/m3.

11. The facade construction of claim 1 , wherein the second thermal insulation elements have a density between 150 kg/m3 and 50 kg/m3.

12. The facade construction of claim 11 , wherein the second thermal insulation elements have a density between 130 kg/m3 and 60 kg/m3.

13. The facade construction of claim 11 , wherein the second thermal insulation elements have a density between 100 kg/m3 and 70 kg/m3.

14. The facade construction of claim 1 , wherein the protective layer can be directly applied to the free surface of the second thermal insulation elements and wherein the protective layer comprises a reinforcing coat.

15. The facade construction of claim 2 , wherein the mounting plates are fixedly attached to the retaining rails.

16. The facade construction of claim 1 , wherein the second thermal insulation elements are fixedly attached to the mounting plates.

17. A method for assembling a facade construction, comprising:

attaching a plurality of spacers to a outer wall of a building, each of the spacers having a first end and a second end with the first ends of the spacers in horizontal rows, wherein a vertical spacing of the horizontal rows substantially match a length of first thermal insulation panels;

inserting a plurality of retaining rails into a corresponding plurality of slots provided at the second ends of the spacers of the horizontal rows of spacers;

clamping the retaining rails with tightening screws that project into the slots to the extent that the spacing of the retaining rails from the outer wall of a building substantially matches the thickness of first thermal insulation panels;

hanging first thermal insulation panels between retaining rails located one above the other;

attaching a plurality of mounting plates to an outer side of the retaining rails with fastening elements; and

fixedly attaching a plurality of second thermal plates to the plurality of plates along a continuous and planar mounting surface formed by the mounting plate.