The short answer
Both replace an up-and-over and both reclaim the driveway space it swings into. The choice comes down to headroom inside the garage, how much you want to insulate, and what the opening will physically take.
- Roller
- Coils above the opening, minimal internal intrusion
- Sectional
- Panels run back along the ceiling
- Both
- No outward swing into the drive
Roller doors
A roller curtain coils into a barrel above the opening, so it uses almost no internal ceiling space. That suits garages with storage in the roof, a low ceiling, or an internal door immediately behind the opening.
It needs headroom above the lintel for the barrel, which is the one dimension that catches people out on older garages with a high door and a low ceiling.
Sectional doors
Sectional panels lift and run back horizontally along the ceiling on tracks. They generally offer better insulation and a more substantial panel appearance, with more finish options that match modern house elevations.
The trade-off is losing the ceiling space that the tracks and panels occupy.
- Loft storage above the garage, roller
- Garage becoming a gym or workshop, insulated sectional
- Very short driveway, either, both avoid the outward swing
- Tight headroom above the lintel, sectional often fits better
Insulation and noise
Insulated sectional doors generally outperform standard roller curtains thermally, which matters if the garage is heated or has a room above. Both are quieter than an old up-and-over, particularly with a belt-drive operator.
Measuring properly
Opening width, lintel height, headroom, side room and the state of the jambs all decide what will actually fit. We measure all of it in person rather than quoting from a width, because a door that does not fit the structure is not a saving.
Common questions
Which is cheaper, roller or sectional?
Roller doors often come in lower at entry level, while insulated sectionals sit higher. Specification varies enough that the honest comparison is between two quotes for your actual opening.
Do roller doors need a lot of headroom?
They need clearance above the lintel for the barrel. Where that is not available, a sectional or an alternative fitting method is the answer.
Which is better insulated?
Insulated sectional doors generally perform better thermally. Insulated roller curtains exist and improve on standard ones without matching a good sectional.
Can either be motorised?
Yes, both are commonly supplied motorised, and modern operators include safety features that older up-and-over gear does not have.