Sanding the board floor - This is how the renovation of the old floorboards

Parquet and floor boards are known for their long life. Over the years, they must withstand the everyday stresses, so that the wood of the soil sooner or later loses its shine and is damaged. Thankfully you do not have to lay a new floor in this case, because you can renovate floorboards and parquet floors, unlike laminate or tile easily by sanding them and re-seal. The refurbishment of the wooden floor is a work that even the handyman succeeds without difficulty. All you need is the appropriate tools that you can borrow from a hardware store. In the following article, we have put together some instructions for sanding and sealing the plank floor, as well as many valuable tips on the subject so that your floor looks like new again soon.

Preparations and Preliminary Work

Before you start sanding the floor

Replace Defective Planks

First, look at what the surface of the floor is like: If old planks of woodworms are infested or completely broken, you must replace them. Unfortunately, this creates visual differences that can not be avoided. You can counteract this by not using the new planks in the required places, but swapping them with wooden planks on the edge. Even under furniture, new planks can hide well. Alternatively, the new planks can be deliberately integrated into the old floor to create an exceptional pattern.

Eliminate holes and breakouts

In the second step, look at the entire surface again for more holes and breakouts to find. They can be stuffed with wooden plugs or filled with putty. You should also detect protruding screws and nails. Lower the nails with a punch and replace any screws that are no longer gripping.

Choosing the Right Grinder

You need the right tool for the grinding job. However, it is very expensive and the purchase of your own equipment is not worthwhile, since they are needed very rarely. After a renovation, the wooden floor finally retains its attractive shine for many years. Therefore, sanders are often offered for loan in the timber or hardware store. The following options are available:

  • Roller Grinders
  • Disc Grinders

Both versions have their advantages and disadvantages, which is why you should seek advice from specialist dealers.

Disc Grinders are easy to handle and therefore recommended for laymen.

Inexperienced, when using a roll grinder, it can happen that the machine breaks loose on its own and then leaves unsightly grooves in the wooden floor. However, the roller devices are well-suited for sharpening the soil when they are grained with coarse-grained paper. Ideally, you are lending out both sanders so that the right machine can be used for each sanding cycle. In addition, you should get a corner or edge grinder for the edge areas.

Instructions: How to grind the wooden planks

When sanding the wooden floor, a lot of fine sanding dust is produced. You should therefore always wear a respirator during both sanding and subsequent disposal of the dust. The floor is sanded in several passes with different grain sizes for a perfect finish.

1. Grinding

The first cut is done diagonally with a roller grinder. Depending on the condition of the floor, you work with grain size 40, 24 or 16. This sanding is used to eliminate differences in height of the planks and to remove paint and paint residues from the floor. As soon as the individual planks are at the same height, use the edge or corner grinder for the edge of the plank floor. Afterwards, the first grinding pass is completed.

Further sanding passes

Then sand the plank floor in the direction of the planks piece by piece with a finer sandpaper. At least four passes with the disc sander are required and the following granulations should be used:

  • 60
  • 80
  • 100
  • 120

After each pass, you will also be working the edges with the same grain size. After the last fine sanding, thoroughly clean the floor with a vacuum cleaner.

Attention: Risk of fire due to sanding dust

The dust particles settle on the wood and in the joints. They absolutely must be eliminated.

The sanding dust in the joints or on the wooden floorboards may ignite. A cigarette is enough for that.

Although the grinders suck most of the dust away, there are always residues left over. For cleaning the plank flooring, borrow a professional vacuum cleaner with a fine filter. So the soil is freed from sanding dust without leaving any residue. A commercial vacuum cleaner is not suitable for this purpose. You can also use the sanding dust to repair small quirks or cracks in the planks. Mix with wooden spatula. In this way, you will receive a filler that has approximately the same color tone as the rest of the planks.

To properly care for the floor after sanding

After sanding, the wood needs extra protection to withstand the everyday stresses.

Seal the floor with oil or wax

A seal is essential to the freshly polished floor. This gives the floor the desired sheen.

In the past, floorboards were often sealed with lacquer. Experts advise against this today. The paint can also get into the joints and would harden there. Later, the wood contracts due to the changing humidity and expands again, causing the paint to peel off due to pressure.

More suitable are natural oils or a combination of oil and wax to seal the plank floor. Mostly you have to oil the soil in two passes. However, you should always adhere to the respective manufacturer's instructions. Alternatively, you can also use combination products made of hard oil and wax, which are specially designed for wooden floor care. For health reasons, they should not contain any solvents. Spread the product on the wooden planks in two passes at approximately 40 to 50 grams per square meter. Use a large floor roll for the work area for the edge areas, and for large areas. After 15 minutes you can oil again the places that are still dull. If these areas have absorbed enough oil for another short exposure time, wipe off the excess oil with a squeegee or rag it on.

Subsequent polish will add shine

For even more shine a subsequent polish of the plank flooring. She succeeds with a polishing machine. The polishing attachment works the oil thoroughly and picks up excess oil with a rag. Since oil-soaked rags could ignite, they should be collected in a metal container with a lid or kept wet in a water bucket. After 24 hours at the earliest you can apply wax again. It can also be distributed evenly with the polishing machine, but you should use this product sparingly. Distribute small quantities evenly on the floor and then work them in. After the wax has dried briefly, you can polish again.


In order to sand a plank floor, hobby craftsmen can borrow the necessary equipment from the wood trade. The soil is ground in several grinding passes with different grain sizes. This is followed by a seal that protects the floor and gives it shine.

Product Image: © ba11istic /