Drill dowels

The drilling of the dowel hole must be done with precision, because a dowel holds only as well in the dowel hole, as this is exactly fitting for the dowel. So there is to consider the basic procedure when drilling the dowel holes nor the properties of the material from which the subsurface consists.

Drill dowel holes in different materials

Dowels are used in ceiling, floor and wall. The underground can consist of numerous materials. Typical are, among other things, the following building materials from which the substrate may consist:

  • concrete
  • Drywall (plasterboard, etc.)
  • full brick
  • hollow tile
  • Aerated concrete (aerated concrete)

These are the most commonly used materials when it comes to the material of walls, ceilings and floors. The properties range from porous and slightly brittle to extremely hard or soft. Therefore, you will then be given various procedures to drill dowel holes.

Drilling concrete, aerated concrete and similar materials

Aerated concrete or aerated concrete is relatively soft. So you can use a conventional stone drill bit. Some craftsmen and do-it-yourselfers even swear by gas concrete on metal drills, as they literally cut the holes. You should, however, use an old metal drill. The holes are drilled only by turning the drill and you do not have to pre-drill.

It looks a bit more problematic with concrete. Here you should use special concrete drills that are also hardened. It makes sense to pre-drill with a small drill. You also need to set the drill to percussion drilling. Depending on the quality of the concrete, you may not be able to drill through the material with a standard drill and you will need a hammer drill instead.

Drill dowel holes in drywall components

Mostly it will be plasterboard (GK) boards. However, it is also decisive whether the drywall panels were placed directly on the masonry or whether a stud frame is behind it. Here you must differentiate above all according to the type of dowels and thus also after the procedure when drilling.

Either use special drywall dowels that cut into the slabs or cavity dowels that spread out in the cavities in a star shape behind the slab. Drilling is done without a hit. Through the drywall you can also "cut" with an old metal drill. You do not necessarily have to pre-drill at a slow speed.

Drilling bricks (hollow and full)

To drill dowel holes in bricks you should use special brick drills. These look like a combination of metal and stone drills at first glance. The blunt tip of stone drills is a bit finer and at the same time sharp-edged. But there are also specially hardened brick drills, as they are used for brick pans, which look like metal drills.

Important for these drills is the cutting edge. This must necessarily be sharp. In addition, the drill must not be struck. This will allow you to drill holes in the bars, especially in hollow bricks, which are precise and will not break. With full bricks, this problem is also avoided.

Tips & Tricks

Despite all precautions, it can happen that the drill hole no longer fits. In most cases, the dowel hole can be salvaged by using dowels for bonding, ie chemical or injection dowels.

Video Board: How to drill perfect holes for dowels