Why your garage door loses more energy in winter than you think
Drafts, dampness, and cold floors almost always enter through the gaps at the main gate and side doors. Here's how to seal everything in minutes – and save energy immediately.
1) The problem in 30 seconds
Even small gaps act like a permanently open window – cold outside air in, warm air out. The result: a damp garage, cold adjacent rooms, higher costs.
The solution is not complicated: magnetic gap seals close the bottom edge and sides instantly – without any drilling.
2) The 5 biggest heat leaks
- Bottom edge of gate: Gap to the ground due to unevenness or settling.
- Side areas/reveal: Wind pressure pushes cold air in from the side.
- Roller shutter support: contact area too small – air gets underneath.
- Side doors: missing bottom edge seal, especially basement/side entrance.
- Rodent trails: open edges – dirt and mice find their way in.
Practical tip: Damp edges, dust streaks or light gaps are sure signs.
3) 60-second rapid test
- Close the gate, place your hand on the bottom edge – do you feel a draft? Seal it up.
- Check the sides with a flashlight – can you see light? Seal them.
- Check the side door – is there a cold draft at your feet? Check the door seal .
4) The solution: suitable gap seals
Sectional doors
Magnetic profiles close the gap in the floor, can be shortened, and are installed in minutes.
Can be shortened without drilling ; rodent protection
Rolling and high-speed doors
Wide base profiles for uneven ground, even in strong winds.
large print run heavy-duty
Side doors & basement
Magnetic door gap seals – weatherproof, also available with adapter tape for wood/aluminum/plastic.
weatherproof, rodent-proof
Note: Seals are not approved for fire doors.
5) Selection matrix (Goal type → Recommendation)
| situation | problem | Recommendation | link |
|---|---|---|---|
| Private sectional door | Draft at the bottom edge | Magnetic gate seal (can be shortened) | Sectional door |
| Workshop/Industry | Uneven ground, wind pressure | Wide roller door seal | Roller door/high-speed door |
| Side door/basement | Cold & Rodents | Door gap seal + side protection | Door seals |
6) Installation: without drilling
In 3 steps
- Clean the surface (dry/grease-free), measure the length.
- Shorten the profile, deburr the edges.
- Attach magnetically, check for a tight seal, and fine-tune.
Tips
- For wood/aluminum/plastic: adapter strip as a magnetic base.
- Side protection plates increase service life and provide rodent protection.
7) FAQ
Does the seal also cover water?
It significantly reduces splashing water and drafts. A threshold/lower is also recommended to prevent standing water.
Will it hold up in winter?
Yes. A clean substrate and regular cleaning of the sealing surface are important.
Installation without drilling – really?
Yes, the magnetic profiles adhere directly. For non-magnetic surfaces, use the adapter tape.
Can I use this to keep mice away?
Seals with rodent protection edges and side protection significantly hinder penetration.
