For your parquet sanding project, here are the recommendations concerning the abrasives to be used, taking into account the type of abrasive and the grain:

Types of abrasives

Aluminium oxide (corundum)

Versatile and suitable for most parquet floors, it offers good value for money for hardwoods and classic parquet floors.

Silicon carbide

Particularly effective for removing thick varnish and working on hard surfaces. It is often used for the first sanding passes.

Zirconium

With a long service life, it is ideal for demanding work on large surfaces. Its higher cost is offset by its durability.

Ceramic

This highly resistant abrasive offers excellent performance on hardwoods and heavily worn parquet flooring. It is particularly suitable for professional use.

Grits to use

Coarse grit (16 to 40)

Used for the first stage of sanding, it removes old finishes (varnish, wax) and corrects significant irregularities in the parquet flooring.

Medium grain (50 to 80)

This stage is used to smooth out the marks left by the initial sanding and to prepare the parquet for the finishing stages.

Fine grain (100 to 150)

This produces a smooth surface, ready to receive the finishing touches. It is a crucial stage for a professional result.

Very fine grain (180 to 240)

Used for finishing work, just before applying varnish or oil. It ensures a perfectly smooth surface.

For best results, always start with a coarse grain and progress to a finer grain. Adapt the choice of grain and type of abrasive according to the initial condition of your parquet and the desired level of finish.