4. Adjust the Rollers Most sliding doors have screws located at the bottom of the door, often accessed through small holes. Use the appropriate screwdriver to turn these screws. Turning the screws clockwise typically raises the door, while counterclockwise lowers it. Make small adjustments and test the door after each adjustment until it glides smoothly along the track.
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In the case of residential construction, so-called ‘warm’ aluminium profiles are becoming increasingly popular. This means that the profile construction consists of two metal sections, joined by a thermal plastic insert, such as glass fibre-reinforced polyamide. Such a profile generally has three or four chambers, with additional polymer foam filling in the middle chamber.