For every building professional, the spirit level always has its place in their toolbox. Good DIY enthusiasts also cannot do without it when carrying out their projects. It is defined as the ideal device to check and determine the horizontality and verticality of a surface.
Compared to other measuring instruments, this equipment stands out for its ease of use. If you do not know how to handle it, this article is very helpful. But before addressing this topic, let’s look at the essential information about it.
The key takeaway: I consider the spirit level as the indispensable extension of the DIYer’s eye. In my view, the precision of a project does not depend on the complexity of the tools, but on the accuracy of this small vial of liquid. I find that there is nothing more visually unsettling than a shelf or a frame slightly askew: it gives an impression of carelessness to the entire room. In my opinion, it is a trusted tool that simply requires a clean surface and a bit of method to ensure that your creations fit perfectly within the lines of your home.
What is a spirit level?
This tool is designed to measure inclinations precisely. It is among the essential equipment for building professions construction. Other specialists such as glaziers, masons, and carpenters also use it similarly.
During renovation projects, it helps test the horizontality or verticality of a surface or piece of furniture. It is especially useful when hanging wallpaper or fixing a shelf. If you want your work to be perfectly level, do not hesitate to use it.
The spirit level is generally made of metal. It is notable for its flat surface equipped with one, two, or three tubes. These contain a colored liquid and, of course, one or more air bubbles. These bubbles indicate whether the level is perfectly positioned or not.
When installing my first fitted kitchen, I made the mistake of trusting my floor, which I thought was perfectly flat. I installed my base cabinets without checking the overall horizontality. The realization was immediate when installing the countertop: nothing was aligned and I had a two-centimeter gap along the length. I had to dismantle everything to adjust the cabinet feet. That day, I learned that a level never lies, unlike our visual perception often fooled by perspectives. Since then, I apply the “double check” rule: I always flip my level 180° to ensure the bubble indicates the same position. This is the only way to be sure the tool itself is not faulty.
Tips for using a spirit level correctly
| Steps / Tips | Description |
|---|---|
| 1. Understand the purpose of the spirit level | The spirit level is not reserved for professionals. Anyone can use it as long as they know a few simple rules. |
| 2. Position the tool correctly | Place the spirit level on the surface to be measured. It must rest flat on the support, whether it is horizontal or vertical. |
| 3. Read the position of the bubble | If the bubble is centered between the two marks, then the surface is perfectly straight. Otherwise, it is tilted. |
| 4. Adjust the surface or the level | Move or adjust the surface or the instrument until the bubble is exactly in the center, indicating the correct angle. |
| 5. Choose the right type of level | There are several models: rectangular level, trapezoidal, or pocket level. The choice depends on the type of work to be done and the available space. |
What is the accuracy of a spirit level?
Even though this tool is mainly used for common tasks, it demonstrates great precision. That is why it is the best companion for electricians, masons, tilers, or carpenters in their daily tasks.
In general, its accuracy remains at half a millimeter per meter. The spirit level is equipped with 1 to 3 vials. If one helps you perform vertical measurements, another allows you to check horizontal ones.
For the most advanced models, the third vial is used to determine angles. They are capable of measuring these 3 parameters simultaneously.
Usage table of the spirit level
| Type of measurement | Vial to use | Bubble position | Common application |
| Horizontality | Central vial (horizontal) | Between the two reference marks | Installing shelves, worktops |
| Verticality | End vial (vertical) | Between the two reference marks | Installing partitions, door frames |
| Inclination | Rotating vial (if present) | According to the predefined angle | Gutter slope, drainage |
| Verification | Tool inversion (180°) | Identical to the first measurement | Tool reliability check |
| Alignment | Edge of the tool | Full contact with the support | Tracing reference lines |
Difference between a spirit level and an electronic level
- Main function identical: Both tools are used to check the flatness or verticality of a surface.
- Nature of the instrument: The spirit level is a manual tool, while the electronic level is a digital device powered by batteries.
- Measurement accuracy: The electronic level offers significantly higher accuracy, ideal for frequent or professional measurements.
- Ease of use: Thanks to its digital display, the electronic level is easier to read, especially for beginners.
- Mobility and comfort: The electronic level is designed to be practical, easy to handle, and suitable for regular use.
Whether it is the first or the second, these two tools generally perform the same roles. However, the latter model is an electronic version. It is the perfect instrument when you need to take measurements regularly. In this case, the classic bubble level is not suitable to satisfy you.
The electronic model, on the other hand, shows remarkable precision. To accomplish its tasks, it operates with batteries. As a result, it is pleasant to use, thanks to its mobility and ease of handling.
If you hesitate to purchase it, you can read our article dedicated to the advantages of the electronic level
Everything you need to know about using a bubble level for perfect accuracy
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When marking a spot on your wall, you need to define the level. To measure the horizontal one, place the tool flat against the surface. If your goal is to estimate the vertical plumb, position it against the upright post facing upwards.
This measuring instrument helps you know if a surface is perfectly horizontal or vertical. It allows you to check if it aligns very well with the reference angle.
Besides the vials, the spirit level contains a colored liquid which is generally yellow. This is sometimes ethanol, as it does not freeze easily except at very low temperatures.
