Due to the specific design of top-mounted roller shutters, it is also possible to assemble them in existing buildings. However, when replacing the window joinery, the height of the windows should be reduced by the size corresponding to the appropriate roller shutter box.
The DK-RNB top-mounted roller shutter box can be housed completely, so it will not be visible. It is also possible to use partial housing or leave the box without a housing, like in the DK-RNC roller shutters, and finish the roller shutters with a wide palette of veneers. In both types of roller shutters in the PVC box, inspection flap is located inside. In contrast, the two types of roller shutters in the EPS warm box, there are two variants of the inspection flap location: exterior or interior.