FR2542348A1 - Method for external insulation - Google Patents

Abstract

The invention relates to methods for external insulation using synthetic foam-based panels. It consists in fixing, by means of nails, screws or dowels 6, sheets of expanded metal 4 in order to press the insulating panels 2 against the support walls 1 in order to avoid having to clean the latter perfectly, an operation which is essential in other methods using adhesives as the only fixing element. The use of expanded metal on the insulating panels allows the use of conventional mixed coatings 7 commonly employed by professionals.

Description

Exterior insulation process
The present invention relates to methods of insulating buildings from the outside.

 In the processes using insulators in the form of plates based on synthetic foam such as expanded polystyrene plates, polyurethane plates, formo-phenolic expanded plates, the method currently used consists in sticking these to the walls. , particularly serious because of the capital importance of the draconian conditions that requires a lasting bonding. On the other hand, due to the very low density of these insulators and their friability, the only coatings used in finishing are thin coatings to avoid overloading of weight which would risk breaking the attachment thereof on the insulator. To achieve a homogeneous surface, thin metal mesh or fiberglass mesh is used, both of which are glued to the outside of the insulators.

 This very expensive bonding system by its preparation, prohibits the use of conventional thick plasters, which are less expensive, however, than the multi-layer system of thin plasters. This results in long, meticulous and very expensive work to obtain a lasting result over time. this work also requires a specially trained mayor.

 Another method using glass or rock wool, consists in fixing wooden beams by means of brackets at spacings corresponding to 1 width of the bands of glass wool or rock to maintain this type of insulation to fix new brackets to place sheets of expanded metal, leaving an air space between the insulation and the expanded metal. A classic bastard mortar is projected onto this sheet of expanded metal. This process which is close to a mason's work nevertheless has a major drawback which should make this process prohibitive. Indeed the effect of capillarity of the fibers composing this type of insulator is well known, and allow to create an air mattress coming from outside therefore humid depending on the season.

 It is tainting with certainty the hygrometric degree of the insulation and its functions since their qualities of insulation are essentially based on their absence of humidity, an essential factor of neutrality of thermal conductivity.

 The process according to the invention makes it possible to obtain the maximum insulation qualities, characterized in that it literally overcomes the need to make a prior cleaning of the walls as absolute as in other systems, such as brushing, or even disking, intended to remove the old paintings which would not be absolutely adherent to the wall, like in other cases the quilting of plaster aged and not very adherent. According to the invention, simple dots of glue are placed on the wall to temporarily hold the insulating foam plates.

 In a second operation, sheets of expanded metal sold for this use will be pressed directly onto the insulation panels, tightening them against the walls using nails or not, screws or any other appropriate technique using dowels if necessary. , embedded in the supporting walls. The insulating panels and the mesh will therefore be fixed according to the invention in an absolutely mechanical and definitive manner over time, whatever the nature of the previous coating of the walls. Maintaining the insulation as well as the supporting mesh of the mortar, thus ensured under optimal conditions of efficiency and speed, it thus becomes possible in a third phase to proceed to the conventional plastering of the insulated walls with a bastard mortar usually used by Masons.

 The accompanying drawing is a perspective view of an insulated wall according to the method.

As shown, the process consists in temporarily fixing insulating plates 2 on the walls 1 with dots of glue 3 in a second step by pressing on the insulating panels sheets of wire mesh or expanded metal 4 by means of points or of special screws5 taking anchor in dowels 6 a conventional coating such as a bastard mortar 7 being projected onto the sheets of mesh or of expanded metal which serve as attachment support for the latter.

 The method according to the invention allows the isolation from the outside of all types of construction including tall buildings, by known technical means without the use of specialized labor, thanks to the mechanical fixing insulation and thick plaster support while avoiding the dangers of using thick mortar capable of collapsing on the ground and possibly on rescuers in the event of fire.

Claims (1)

 Claims A method of insulating from the outside of all types of construction, characterized in that it consists in ensuring the fixing of insulating sheets on the support walls by sheets of expanded metal fixed by means of dowels, screws or nails special allowing the use of conventional plasters executed by all masonry professionals.