dowel guide

But which dowel do I actually need?

There are different types of dowels, so it's easy to lose track - but no problem, we'll show you how to find the right dowel for your project. If you have any further questions, we are available on +49 (0) 2154 8123-460 or here .

In order to find the right anchor for your project, it is first important to determine the mounting surface

The mounting surface has a significant impact on the choice of anchor system and should not be ignored.

Here's how to find out what kind of subsoil it is:

1. The knock test

If you hear a hollow/dull noise when you knock, then this is a lightweight wall and a cavity dowel is required.

However, if the knocking indicates a solid wall, a test bore is advisable.

2. The test bore

When determining solid anchoring ground, a test bore should be carried out so that the building material can be determined from the drill dust.

Overview of the properties of the anchoring substrates and the drill dust

  • concrete

    The substrate is hard and the drill dust is light grey, dusty and free-flowing

  • brick

    Bricks are medium strength and the drill dust is red.

    If the drilling progress is jerky, you are dealing with perforated bricks that should be drilled further without a percussion drill

  • sand-lime brick

    The strength of sand-lime bricks is medium to hard and the drill dust is white and has a sandy consistency

  • aerated concrete

    The aerated concrete has a soft consistency and has white, coarse-grained and slightly greasy drilling dust

  • Gypsum plasterboard/gypsum fiber board

    The gypsum board is characterized by its soft strength and its white drill dust.

    The gypsum fiber board, on the other hand, is soft to medium-firm and has gray drill dust.

    Both plates are characterized by fine drilling dust, which sticks to the drill bit.

  • ETICS insulation

    ETICS insulation, regardless of whether it is made of styrofoam, mineral wool or wood fiber, is characterized by its soft strength.

After determining the mounting base, we now come to the types of anchors.

Dowel systems can roughly be divided into three categories. These differ from each other by their load values.

Chemical dowels

The chemical anchors, also known as injection mortar or composite mortar, not only have many names, but can also carry many loads.

The composite mortar, which usually consists of 2 components, makes it possible to anchor heavy loads without expansion forces. This ensures secure anchoring even in sensitive materials such as masonry and fastenings in concrete close to the edge of the component.

For which substrates are chemical anchors actually suitable?

Chemical anchors are suitable for anchoring in aerated concrete & sand-lime brick, reinforced concrete / reinforced concrete, granite & marble as well as in masonry & perforated brick. When fastening in perforated bricks, the corresponding perforated sleeve must be used.

A few application examples

  • balconies

    * only with products with rebar approvals

  • canopies

    * only with products with rebar approvals

  • awnings

  • bridges

  • Gates

  • scaffolding

Introducing our composite mortars: All special features at a glance.

  • Our VK

    Also suitable for subsequent reinforcement connections (rebar).

    to the UK 

  • Our PASF

    For your DIY project

    to the PASF 

  • Our UM-H

    100 years service life

    to the UM-H 

  • Our EP1000

    100 years service life + suitable for subsequent reinforcement connections (rebar).

    to the EP1000 

bolt anchor

Bolt anchors are suitable for immediately loadable anchoring of heavy loads in concrete. A simple push-through installation minimizes the time required considerably.

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A few application examples

  • sun sail

    * Outdoor applications only with bolt anchors made of stainless steel (A4)

  • storage racks

  • balcony railing

    * Outdoor applications only with bolt anchors made of stainless steel (A4)

  • Suspended ceilings

  • cable trays

  • metal constructions

plastic anchor

A plastic anchor is sufficient for light loads. For quick and easy attachment to concrete, aerated concrete, masonry, wall panels, gypsum plasterboard, gypsum fiber boards

to the product

Some info about the holding values ​​and application

A few application examples

  • curtain rods

  • lamps

  • picture walls