Patent ID: 7726079

Claim:
A means for the dehumidification, perspiration, ventilation or impermeabilization of walls, floors and/or ceilings by the use of a double fretted membrane (M 1 , M 2 ), the shape of which defines longitudinal channels (C), characterized in that there is provided a peripheral section ( 1 ) having a tubular body 4 from which two pairs of longitudinal ribs ( 2 , 3 ) perpendicular to each other and extending all over the length of section ( 1 ) project, each pair of ribs ( 2 , 3 ) being able to receive a peripheral edge of the double membrane (M 1 , M 2 ), and characterized in that in order to dehumidify and/or to cause the surface of a building to which the double membrane (M 1 , M 2 ) is applied to perspire, the section ( 1 ) is provided with side holes ( 7 ) longitudinally distributed between each pair ( 2 , 3 ) of the ribs, characterized in that once the double fretted membrane (M 1 , M 2 ) is inserted between the pairs of ribs ( 2 , 3 ), said side holes ( 7 ) are positioned at channels (C) of double membrane (M 1 , M 2 ) so that the humidity and/or any gas in said channels enters tubular body ( 4 ) of section ( 1 ) through holes ( 7 ) to come then out to the outside through a piping or conduit ( 5 ) arranged to connect at least one of the two ends of tubular body ( 4 ) of section ( 1 ) to the outside, thus providing a ventilation of the building directly to the outside.