Prefabricated panel for the insulation of existing building façades

Abstract: A plurality of prefabricted flat panels (20) consisting of a three-dimensional metal grating (1) and a surface layer (2) of foamed plastic material is applied and fixed to the existing façade (7) taking care to place said layer (2) of foamed plastic material against said façade. Plaster (10, 11) is then applied for complete covering of the uncovered part of the metal grating (1).

Description: The present invention relates to a prefabricated panel for the insulation of existing building façades. The work of renovating old buildings is known to comprise the reconstruction of the façade, in particular by the application of insulating material on the outside of said façade. An insulating prefabricated panel is known from DE-A-3317628 and comprises a plate of heat insulating material and an undulated metal wire net extending along a major face of the plate. The object of the present invention is to provide an insulating prefabricated panel for façades of existing buildings which would be low in cost and easy to apply and would produce a high-quality finished product. The panel in accordance with the invention comprises a metal grating and a plate of heat insulating material associated with the grating in such a manner as to fill it partially and to protrude laterally from one of its major faces, characterized in that said grating is formed by two flat parallel nets with perpendicular wires joined together by oblique connecting pieces and said plate is formed by a flat layer of foamed material. By using prefabricated panels of the abovesaid type, which can be produced in the factory and then cut to measure in accordance with different requirements, the invention achieves the result of low cost and easy installation, this last due essentially to the lightness of the panels and the clinging of the plaster which is assured by the geometry of the metal grating of the panels. The quality of the finished product is assured by the excellent insulating effect of the layer of foamed plastic material next to the prexisting façade which functions as a thermally inert mass. For a better understanding of the characteristics of the present invention reference is made below to the annexed drawings wherein: FIG. 1 shows a perspective view of a flat prefabricated panel in accordance with the present invention, FIG. 2 shows said panel sectioned along a vertical plane, and FIG. 3 shows a panel like that of FIGS. 1 and 2 installed on a preexisting façade. The panel illustrated in FIGS. 1 and 2 indicated as a whole by reference number 20 consists of a three-dimensional metal grating 1 partially filled with a flat layer 2 of foamed plastic material, e.g. polyurethane, which protrudes laterally from one of the major faces of the grating 1. The three-dimensional grating 1 is formed of two flat parallel nets with perpendicular wires 3 and 4 united by connecting pieces 5 and 6 alternately inclined in one direction and then in the opposite direction as can be seen in FIG. 2. To insulate the façade of an existing building a plurality of panels of the type described, prefabricated in a factory and transported to the site where they are cut to size depending on the various requirements, is used. The panels 20 are then applied to the façade 7 to be insulated taking care to place next to the building façade the face of the panel from which protrudes the layer of insulating material 2 (FIG. 3). By means of metal strips 8 forming a rabbet against the uncovered net of the grating 1 and expanding nogs 9 the panels are then fixed to the façade. Alternately appropriate mortar adhesives may be used. The part of the grating 1 not occupied by the insulating layer 2 is filled with a first layer of plaster 10 which is followed by a second layer of finishing plaster 11. The first layer 10 is preferably applied by spraying flush with the edge of the net so as to secure a uniform and rough surface. The second layer 11 is preferably applied with one pass after the setting of the first layer. On the second layer of plaster will be applied a finish, for example by trowelling or floating.

Claims: Flat prefabricated panel for the insulation of existing building façades, comprising a metal grating (1) and a plate (2) of heat insulating material associated with the grating (1) in such a manner as to fill it partially and protrude laterally from one of its major faces characterized in that said metal grating (1) is formed by two flat parallel nets with perpendicular wires (3, 4) joined together by oblique connecting pieces (5, 6) and said plate (2) is formed by a flat layer of foamed material. Panel in accordance with claim 1 characterized in that said foamed plastic material is polyurethane.

Inventors: ROZZI, CONSTANTINO
Applicants: R.E.IN. S.P.A.
Application year: 1987
Main classification: E04B1
IPC codes: E04C2, E04B1, E04F13