Grind the spatula professionally


Filling work, which must be finished by sanding, are the plastered plasterboard in drywall. How much you have to grind depends greatly on how you want to finish the wall or ceiling. So it may even be that you do not first spatulate and then grind, but then again and repeatedly spatulate and grind again. Below you will find a guide that explains in detail how to grind under which circumstances spatula.

The grinding of spatula is divided into quality levels

For dry interior work, ie when working with plasterboard or composite panels, the panels must be filled after assembly. This in turn implies that, after filling, sanding is also required to get a really smooth surface. However, when leveling and sanding gypsum boards differentiation is made according to different quality levels. Depending on how you want to treat a wall or a ceiling, but also a floor, the respective quality levels must be achieved. So it is logical that a wall, which should be tiled at the end, not as accurate as a sanded painted or painted wall.

Professional sanding is alternated in several steps with multiple trowelling

However, many do-it-yourselfers mistakenly assume that the high surface quality is achieved only by grinding. Rather, it is the perfect interaction of spatulas and loops that comes into play here. This is also the approach of professional craftsmen. First, the surface is filled, then the spatula must have enough time to dry and harden. Thereafter, the filled surface is then sanded. Now apply putty again, this time finer. Then wait again until the spatula is completely dry and grind again. This time preferably with a sandpaper with a finer grain size.

Q4 - even for skilled craftsmen, this level of quality is a challenge when grinding

Dryers often apply a final, third coat of paint. The surface is now even more finely filled and sanded with a grit sandpaper according to the application. Now the surface is so even that you can paint or paper with no problem. However, there are also finishing finishes that require an extremely accurately smoothed and sanded surface. For example, if you want to stick on a thin metal wallpaper or paint with high gloss paint.

If such a high surface quality is necessary, it is no longer sufficient to fill in only joints and edges and to grind them. Rather, now the entire surface must be filled and sanded. If necessary, several alternating steps of grinding and spatulas are again required here. However, this high quality level requires the highest level of craftsmanship and even for masters of their trade means a demanding job. This filler and grinding quality is then with Q4 the highest quality level.

Tips & Tricks

Under normal lighting conditions, a ground surface often appears to have been processed sufficiently. However, when the sun is low, you often see shadows that appear on polished ceilings and walls. To avoid having to wait for the light to shine optimally on the ground surface, you can use a halogen spotlight and let it shine along the surface. Immediately you recognize bumps, which you can grind better now or if necessary even again spatulate and then grind.

As a rule of thumb, you should use a leveling and sanding technique: anything you can "feel" about unevenness with your fingers as you stroke it, you will also see clearly on a painted or painted surface. Even under wallpaper, such bumps can suddenly become visible. Grinding is one of the most unpopular and costly jobs, but in the end, its quality is significantly involved in the later appearance of the finished surface. In addition to physical stamina and skill, therefore, patience is the outstanding virtue, which is responsible for a first-class work result.

This knowledge is important, even if you want to hire a craftsman with the filling and grinding: do not simply agree in the contract "trowelling and grinding", but also clearly define the quality level that must be achieved.


Video Board: Traditional process of rice grinding with a stone