Abstract: Assembling a window frame with shutter channels mounted on it is facilitated by an indirect or direct mechanical connection of the shutter-housing base plate to the upper leg of the window frame by connectors on the front that extend over the area between the shutter channels, at a distance therefrom over the length of the upper leg of the frame. The screwless connection between the complete shutter housing and the window frame saves time and personnel.

Abstract: An exterior roll-up shutter consists of positioning strips that can be mounted on an outside wall on or next to the reveals and of a housing that rests against the strips. The housing is constituted of side walls, a floor, a rear and front wall, and a ceiling. The housing accommodates the shaft and panels of the shutter itself. It has a shutter exit extending along its floor in alignment with guide channels in the positioning strips. The shutter also consists of the paneled shutter itself, which is accommodated in the housing. To facilitate both installation of an exterior roll-up shutter of the same overall type and replacement of the paneled shutter itself, each positioning strip, which consists of a length of section with a shutter offset that is accessible from inside the window aperture, has an accommodation that extends along the whole strip. The accommodation is accessible from the weather side.