This profile is used to place a lining inside the enclosure. It is made up of a profile (galvanized framework made up of galvanized omega profiles) fixed to the interior side of the enclosure, onto which one or more laminated plasterboards of any type are screwed, whether standard, resistant to moisture or fire. There is practically no thickness to incorporate thermal or acoustic insulation, since normally the omegas have a height of approximately 20 mm. There is also no space for the passage of installations.