Dowels in a soft wall


Not every surface is the same. Consequently, there are masonry or walls that are "softer" than others. Setting dowels can be a problem. However, as is often the case, the preparatory work plays an important role in terms of the quality of its implementation in terms of its later strength.

In soft walls, dowels can be a challenge

Which handyman and even craftsman does not know the problem? A wall is so soft that the dowel simply does not hold and instead rolls through. There have long been good solutions for this. However, success depends on the preliminary work. First, a distinction must be made between different "soft" or problematic walls:

  • Aerated concrete (aerated concrete)
  • Hollow stone walls like brick hollow bricks
  • Drywall, for example made of plasterboard

Dowels in drywall

For drywall there are various special dowels. On the one hand, special plasterboard dowels can be used here, which cut into the gypsum with broad, spiral-shaped external threads and thus tighten themselves.

Dowels in aerated concrete, hollow and brick walls

Since plasterboard walls are often hollow, various cavity dowels can be used. You can also use these cavity dowels with brick hollow walls. Then there are walls made of really soft cellular concrete. Again, there are special dowels.

The right dowel for aerated concrete

According to the principle of operation, these are ordinary expansion anchors which, however, build up an axially longer expansion and are also secured against turning. So much depends on the choice of the right anchor. More about the different and most important dowel types can be found in the linked guidebook.

Drill according to the building material without impact

In such soft walls but also making the borehole is crucial for the dowel. For all the walls mentioned, you should definitely do without the hammer drill function of your drill and instead drill exclusively by turning.

Use special drills

In the case of the brick wall, a drill that is specially designed for bricks - a brick drill - is also recommended. This is particularly hardened at the top and at the same time equipped with a sharp cutting edge. This prevents the thin webs from breaking in cavity tiles. Of course, a reasonable speed is important.

You can also use such a drill with a gas concrete wall. Alternatively, you can also use an old metal drill of the appropriate size here.

Basically to be considered with soft walls

In addition, there is another principle: the softer (and holeier) a wall is, the longer the screw and dowel should be made.

Tips & Tricks

If nothing else helps with mechanical non-positive dowels, then you can also use chemical or injection dowels. These dowels can literally be set in concrete.


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