EP3505704B1

EP3505704B1 - External counter-wall structure for thermal-acoustic insulation of buildings

Info

Publication number: EP3505704B1
Application number: EP18001013.4A
Authority: EP
Inventors: Michele Farina
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-29
Filing date: 2018-12-27
Publication date: 2020-12-09
Anticipated expiration: 2038-12-27
Also published as: EP3505704A1; ES2859727T3; PT3505704T

Description

Technical Field

The present invention finds application in the field of building materials and building constructions and has particularly for object an external counter-wall structure for thermal-acoustic insulation of buildings.

State of the art

As known, the coating of the external walls of buildings by means of counter-walls and thermally and/or acoustically insulating coats generally involves the application to the external wall of special panels applied directly to the wall or spaced, in the case of so-called ventilated walls, in a manner to form an interspace.
Generally, dry-laid coatings involve the application of different layers having different functions, such as for example of thermal and/or acoustic insulation or simple aesthetic function.
The insulating materials currently in use are typically polystyrene, rockwool and similar materials, as they have a relatively low cost and ease of application. However, on the market, particular high-energy-efficient heat-reflecting materials with reduced thicknesses compared to known solutions are increasingly used.
Such materials are formed by a plurality of layers of different materials, such as pure aluminum, aluminized films, wadding and expanded polyethylene sheets.
However, to date no suitable laying system has been found for the exteriors of existing buildings which allows the effective exploitation of the insulating properties of such heat-reflecting materials, due to the characteristics that the material possesses at certain thicknesses, which does not make it drilled with the rotating movement of the drill bit. FR2480834 discloses a coating structure for walls of buildings which comprises most of the features contained in the preamble of claim 1 of the present invention. However, this coating structure comprises a coating made up of a single layer of glass wool, so there is no problem in drilling this material.
Moreover, the nature of the glass wool coating makes it easy to compress, so that any lack of homogeneity in its thickness can be easily recovered by correctly positioning the supporting frame.
US2009308001 discloses a covering structure with a substrate that includes a thermal insulation material comprising at least two materials selecting from a thermal energy reflecting material, a homogeneous foam material, a heterogeneous foam material, a skin material, a skeleton structured material, an electromagnetic wave shielding material.

Scope of the invention

The object of the present invention is to overcome the aforementioned drawbacks by providing an external counter-wall structure for thermal-acoustic insulation of buildings which has characteristics of high efficiency and relative cost-effectiveness. A particular object is to provide an external counter-wall structure for thermal-acoustic insulation of buildings that allows the use of the latest generation of thermal reflective materials in a particularly efficient manner and conferring high properties of thermo-acoustic insulation to the structure.
Said objects, as well as others that will appear clearer later, are achieved by an external counter-wall structure for thermal-acoustic insulation of buildings according to claim 1, to which reference is made for greater simplicity of exposure.
Advantageous embodiments of the invention are obtained according to the dependent claims.

Brief disclosure of the drawings

Further features and advantages of the invention will become clearer in the light of the detailed description of a preferred but not exclusive configuration of a structure according to the present invention, illustrated as a non-limiting example with the aid of the attached drawings wherein:

FIG. 1 is a sectioned side view of the structure;
FIG. 2 is a front axonometric view of the structure of Fig. 1 partially covered by the outer covering;
FIG. 3 is a rear axonometric view of the structure of Fig. 1 partially covered by the outer covering.

Best mode of carrying out the invention

With reference to the attached figures, a preferred but non-exclusive configuration of an external counter-wall structure suitable for covering the external wall of a building to realize its thermal-acoustic insulation or to increase its thermal and / or acoustic insulation characteristics is illustrated.
The structure, generally designated by 1, essentially comprises a multilayer coating 2 suitable for covering the external wall P of a building, anchoring means 3 of the coating 2 to the external wall P, spacer means 4 adapted to be placed between the coating 2 and the external wall P to keep the coating 2 spaced from the latter and define a first static interspace 5, as required by the regulations.
Advantageously, the multilayer coating 2 will comprise a plurality of layers of different materials, with the outer layers which will be made of reflecting materials, such as aluminum or its alloys or materials based on aluminum and the like, possibly coupled to a reinforcement net.
By way of example, the coating 2 will be a multilayer available on the market and also having 19 layers in different materials, such as pure aluminum, aluminized sheets, wadding and expanded polyethylene sheets.
The structure 1 then comprises a supporting frame 6 adapted to support an outer covering 7 and which is placed on the opposite side of the multilayer coating 2 with respect to the spacer means 4.
According to a preferred embodiment, the structure 1 is composed of fiber-cement padding panels fixed on a supporting frame 6 formed by a double support frame made of zinc-magnesium steel, by applying the 19-layer thermo-reflecting insulating material in the interspace.
The insulating coating 2 has two outer faces of self extinguishing protected pure aluminum coupled to a reinforcing net; the seventeen inner layers consist of seven further reflecting films, of which four layers of wadding and six layers of expanded Pe film. The material is sewn on the edges and is provided with a sealing system of the layers with plastic threads every 40 cm that allows avoiding excessive opening during cutting, ensuring also uniform thickness and consequent reduction of thermal bridges. As can be seen from Fig. 1 , the anchoring means 3 has a plug 8 adapted to be fixed in the external wall P of the building and a pin 9 which can be inserted in the plug 8 to protrude from the external wall P with predetermined length that can be chosen according to the features and dimensions of the multilayer coating 2, as well as to the supporting frame 6.
In particular, each pin 9 will be constituted by a threaded bar having a pointed free end designed to provide a corresponding hole in the multilayer coating 2 upon application by pressure of the latter on the anchoring means 3, thus solving the problem of anchorage of this type of multilayer coatings which cannot be drilled by a drill or similar means.
The spacer means 4 comprise a plurality of spacer elements 10, for example sleeves having a thickness of 24 mm, inserted on respective pins 9, with the interposition of a first washer 11, arranged between the wall of the building P and the spacer element 10, and a second washer 12, arranged between the spacer element 10 and the inner side of the coating 2.
In turn, the supporting frame 6 is anchored to the coating 2 always by means of the same anchoring means 3.
The spacer means 4 also comprise a plurality of wooden cross members 13, preferably mineralized wood, arranged to be located between the external wall P of the building and the inner side of the coating 2 in a substantially horizontal position and vertically offset, at the zones free from fasteners 3.
Furthermore, the spacer means 4 comprise a plurality of adjustment nuts 14 adapted to be inserted into the holes made by the pins 9 inside the coating 2 following the application of the latter on the anchoring means 3.
The adjusting nuts 14 can be screwed onto the threaded bars of the corresponding pins 9 with adjustable depth to locally vary the distance of the multilayer coating 2 from the wall P.
The supporting frame 6 comprises a plurality of vertical uprights 15, for example made of galvanized aluminum, anchored each to the anchoring means 3 with the interposition of pairs of bolts 16 placed on opposite sides of the respective vertical uprights 15 and screwed onto the threaded bar of the respective pin 9 to adjust the inclination of the vertical uprights 15, so as to recover any possible inclination of the wall P of the building.
The supporting frame 6 also comprises a plurality of horizontal uprights 17, for example made of galvanized aluminum, which can be anchored to vertical uprights 15 and suitable for supporting the outer covering 7, for example a fiber cement panel, and defining a second interspace 18.
The vertical uprights 15 and the horizontal uprights 17 comprise means for the mutual snap coupling.
In the configuration of the figures, exemplifying but not limitative of the invention, the vertical uprights 15 comprise a plurality of C-shapcd recesses 19 provided with retaining teeth 20 adapted to interact with enlarged longitudinal edges 21 of the horizontal uprights 17 and block them by interference following their snap coupling. Operatively, according to an exemplary modality of application of the structure 1, before proceeding with the implementation thereof, it must be ensured that the wall support is intact, proceeding eventually to the repair of the damaged parts.
Subsequently, we will proceed to mark the vertical lines with a 700 mm wheelbase, and the horizontal lines with a center distance of 800 mm and then drill according to the section of the plug at each crossing point of the lines and insert the respective plug 8, for example in nylon, and the corresponding jointing pins 9, which may be double threaded pins.
At this point the first washer 11, the spacing element 10 and the adjustment nut 14 will be inserted in sequence on the pin 9.
Next, the wooden cross members 13 will be positioned, which may have, for example, a 30x20 mm section, with a center distance of 400 mm, as a spacer between the support wall and the thermal reflective insulation coating 2, in order to create the first interspace 5 of 20 mm.
At this point, the coating 2 is laid by resting it on the tips of the jointing pins 9, applying a manual pressure until the head of the threaded pin 9 comes out for drilling. Subsequently, the second washer 12 is positioned, for anchoring then the supporting frame 6, stopping the vertical uprights 15 and the horizontal uprights 17 with additional washers and with the bolts 16.
At this point we will proceed with the bubble adjustment of uprights 15, 17, both vertically and horizontally and then to fix the fiber-cement panel 7 using self-tapping screws every 20 cm.
From above, it is apparent that the structure according to the invention achieves the intended objects.
In particular, the use of the multilayer coating will make it possible to achieve considerable advantages from a point of view of energy performance, minimum dimensions, the adjustability for leveling the façade planes, for elasticity with respect to thermal and mechanical deformations, for inexpensiveness compared to other types of insulating dry walls, due to the simplicity and speed of installation.
The structure 1 is composed of non-load-bearing but self-supporting building elements and therefore its installation does not directly contribute to the stability of the existing masonry on which it is laid but instead contributes to their durability over time providing better protection from meteorological effects, protecting the building itself from external atmospheric agents.
The coating 2 is also made of imputrescible materials, which do not absorb moisture and therefore do not lose their properties over the years, guaranteeing very high thermal performances as they reflect the radiant energy in very high percentage, substantially differentiating from the other insulators present in nature which, moreover, to exert their insulating function depend directly on the thickness.
The structure according to the invention is susceptible of numerous modifications and variations, all of which are within the inventive concept expressed in the appended claims. All the details may be replaced by other technically equivalent elements, and the materials and tools may be different according to requirements, without departing from the scope of protection of the present invention.
Even if the structure has been described with particular reference to the attached figures, the reference numbers used in the description and in the claims are used to improve the intelligence of the invention and do not constitute any limitation to the scope of protection claimed.

Claims

An external counter-wall structure for thermal-acoustic insulation of buildings, comprising:
- a coating (2) adapted to covcr the external wall (P) of a building to increase its thermal and/or acoustic insulation features;

- anchoring means (3) of said coating (2) to the external wall (P);

- spacer means (4) adapted to be placed between said coating (2) and the external wall (P) to maintain said coating (2) spaced apart from the latter and define a first interspace (5);

- a supporting frame (6) for an outer covering (7), said supporting frame (6) being placed on the opposite side of said coating (2) with respect to said spacer means (4); wherein said anchoring means (3) each comprise a plug (8) adapted to be fixed in the outer wall (P) of the building and a pin (9) that can be inserted in said plug (8) to protrude from the external wall (P), said pin (9) being adapted to make a corresponding hole in said coating (2) upon application by pressure of this latter on said anchoring means (3), wherein said pin (9) comprises a threaded bar having a pointed free end for piercing said coating (2) and said spacer means (4) comprise a plurality of spacer blocks (14) inserted on respective of said pins (9) and screwed onto the threaded bars of the corresponding pins (9) with adjustable depth to locally vary the distance of said coating (2) from the external wall (P) ;
characterized in that said coating (2) is a multilayer coating, and said spacer blocks (14) are adapted to be inserted in the holes made in said multilayer coating (2) upon its application to said anchoring means (3).
Structure as claimed in claim 1, characterized in that said multilayer coating (2) comprises a plurality of layers of different materials, the outer layers being made of reflecting materials, such as aluminum or its alloys or materials based on aluminum and similar.
Structure as claimed in claim 2, characterized in that said supporting frame (6) is anchored to said multilayer coating (2) by means of said anchoring means (3).
Structure as claimed in any preceding claim, characterized in that said spacer means (4) comprise a plurality of wooden cross members (13) adapted to be arranged between the external wall (P) of the building and said multilayer coating (2) in substantially horizontal positions and vertically offset with each other at the areas free of said anchoring means (3).
Structure as claimed in any preceding claim, characterized in that said supporting frame (6) comprises a plurality of vertical uprights (15) each anchored to said anchoring means (3) with the interposition of pairs of bolts (16) placed on sides opposite of the respective uprights (15) and screwed on said threaded bar to adjust its inclination.
Structure as claimed in claim 5, characterized in that said supporting frame (6) comprises a plurality of horizontal posts (17) adapted to be anchored to said vertical uprights (15) and adapted to support the outer covering (7) and define a second interspace (18).
Structure as claimed in claim 6, characterized in that said vertical uprights (15) and said horizontal posts (17) comprise means for their reciprocal snap coupling (19, 20, 21).
Structure as claimed in claim 7, characterized in that said outer covering (7) comprises one or more fiber-cement panels integral with said horizontal posts (17).