Roller box
Housing at the top of the opening that holds the rolled-up curtain of a roller door.
Definition
The roller box is specific to roller doors (such as the Hörmann RollMatic). It houses the axle and the curtain (aluminium slats), which rolls up when the door opens. On the RollMatic it requires 290 mm of headroom (335 mm for doors over 2,300 mm high). It is fitted behind the opening inside the garage, or on the façade with the external-mounting version.
Advantages of roller doors
- Maximum ceiling space saving - ceiling is entirely free.
- Small side clearance: 115 mm each side on the RollMatic, 75 mm on the RollMatic T.
- Ideal for low-ceilinged garages or those with exposed roof trusses.
Trade-offs
- Lower thermal insulation than sectional doors (Hörmann publishes no U-value for the RollMatic; LPU 67 Thermo: 1.0 W/m²K installed).
- Visible box: careful façade integration required.
- Slower opening: 11 cm/s for the RollMatic versus up to 25 cm/s for a sectional door with a SupraMatic operator.
Related terms
Frequently asked questions
Can the box be painted?
The RollMatic curtain comes in 16 standard colours and in Golden Oak or Rosewood woodgrain finishes; we will advise on box colour options for each model.
Mechanics
Back to glossarySectional door
Garage door made of horizontal hinged panels that rise to the ceiling along side tracks.
Torsion spring
Horizontal helical spring that balances the weight of the door leaf and allows effortless manual opening.
Lintel (header height)
Vertical space between the top of the opening and the ceiling of the garage. Determines the track type.