Sectional door leaking air? Here's how to properly seal it.
Typical symptoms & quick check
Drafts, dust clouds, or moisture on the bottom edge of the door? This often means that the seal is missing or has aged.
- Is the profile brittle/cracked? → Replace.
- Uneven floor? → Higher profile (e.g. 55 mm) or double lip.
- Closing edge with optosensor? → Note inner chamber Ø 13 mm or Ø 20 mm.
- Pressure switch panel? → Select the appropriate DW/Crawford profile.
Selection guide: Which profile fits?
The choice depends on the door manufacturer, safety principle (optosensor/pressure switch), and floor conditions. The table will help you get started.
| Use case | Profile recommendation | Sensor/Principle | link |
|---|---|---|---|
| Standard optical sensor, universal | Floor rubber optosensor 55 mm (sold by the meter) | Optosensor Ø 13 mm | To the product |
| Large optosensor | Novoferm floor rubber Ø 20 mm (double chamber) | Optosensor Ø 20 mm | To the product |
| Roller shutter with floor profile 105002011 | Floor rubber for roller doors Ø 20 mm | Optosensor/sealing profile | To the product |
| Hörmann SPU 30/40 | IDD‑HO floor rubber Ø 13 mm | Optosensor Ø 13 mm | To the product |
| Crawford 342/542 | Crawford floor rubber 55 mm | Push button panel | To the product |
| Crawford Graduation | Plug 37 mm for DW rubber | End piece/termination | To the product |
| Universal, high compensation | DW profile Ø 25 mm, double lip | Pressure/sensor recording | To the product |
| Bulk purchase/long roll | Optosensor profile 35 m roll | Optosensor Ø 13 mm | To the product |
| Alpha Deuren sectional door | Alpha Deuren floor rubber Opto | Optosensor (model-dependent) | To the product |
You can find more selection and accessories in our “Floor profiles & sealing” collection .
Recommended products
For optosensor closing edges
- Floor rubber optosensor 55 mm – universal, compensates for unevenness.
- Novoferm Ø 20 mm double chamber – for larger sensors.
- Alpha Deuren Opto – tailored to Alpha Deuren systems.
For pressure switches & special cases
- Crawford 55 mm – for 342/542 series.
- Crawford plug 37 mm – clean finish.
- DW Ø 25 mm, double lip – high sealing effect.
- Roller shutter Ø 20 mm (105002011) – suitable for the mentioned floor profile.
- Optosensor 35 m roll – for projects/service vehicles.
Assembly: short & practical
- Check dimensions and system: sensor principle (optosensor/pressure switch), chamber diameter, height, profile holder.
- Preparation: Remove old seal, clean bottom edge/profile.
- Cutting & inserting: Cut the profile to width; insert the sensor (if available) into the inner chamber.
- Insert & test: Insert profile evenly, check door travel, test closing edge.
Note: Only qualified personnel should work on safety rails. If unsure, please contact a service representative.
Practical examples
- Logistics hall, North Rhine-Westphalia: Replacement for 55 mm optosensor profile → less draft, quieter operation.
- Workshop, Bavaria: Conversion to DW Ø 25 mm double lip → better compensation on uneven ground.
- Industry, Lower Saxony: Crawford 342 gate with new 55 mm profile + 37 mm plug → safe pressure switch function.
FAQ
How do I know the correct chamber diameter?
For optosensors, Ø 13 mm (standard) and Ø 20 mm are common. Pushbutton switch strips typically use DW profiles; always check the system specifications.
Is a higher profile sufficient to cope with bumps?
Often yes – 55 mm profiles or double lip compensate more. For steep slopes, additional measures are necessary.
Can I install profiles myself?
Yes, with basic knowledge. Safety edges (sensors/pressure switches) should only be installed and tested with specialist knowledge.
Are there brand profiles for my gate?
Yes, e.g., Alpha Deuren, Novoferm, Crawford, or specifically Hörmann SPU 30/40. See product table above.
What about roller shutters?
The Ø 20 mm roller shutter profile fits the floor profile 105002011. Check sensor compatibility beforehand.
Do you offer advice?
Sure – send us measurements, photos, and manufacturer information, and we’ll recommend the right profile.
