Frequently Asked Questions
What is threshold climbing on a robot vacuum?
Threshold climbing is the robot vacuum’s ability to roll over small raised strips and door frames without getting stuck or tipping over, with each model having a maximum climb height usually measured in millimetres.
How does a robot vacuum climb thresholds?
It uses a combination of wheel design and weight distribution: the wheels grip and push upward, and if the threshold is within the machine’s climbing capability, it rolls over.
Why is threshold climbing important for my home?
If your home has raised strips between rooms (10mm to 25mm tall), a vacuum with good threshold climbing can roam freely without getting stuck, while one that can’t will need to be manually moved between rooms.
What happens if a robot vacuum can’t climb thresholds?
It will get stuck, spin its wheels uselessly, or refuse to leave certain rooms, forcing you to manually carry it to each zone and defeating the purpose of a robot vacuum.
How does threshold climbing compare to other navigation methods?
The alternative uses sensors or cameras to detect and avoid thresholds, or the vacuum works only in one flat room; some budget models don’t attempt climbing at all.
The bottom line
Threshold climbing is a real feature that matters if you have doorways in your home — and most of us do. It’s not jargon designed to confuse you; it’s manufacturers being honest about what their machines can and can’t do. When you’re comparing vacuums, always check the threshold climbing height and match it to the doorways in your home. If the spec says 15mm and your doorways are 20mm, it won’t work well. Most mid-range and premium robots today climb thresholds beautifully, so it’s a standard feature rather than a luxury. Don’t pay extra for unnecessary climbing ability, but do make sure your chosen vacuum can actually reach the rooms you want it to clean.