Fix wooden posts to concrete

Many older terraces have a concrete slab that is still very good and should therefore not be demolished. Then the ideal way of erecting a patio cover or a winter garden on top is to attach it to the concrete slab. There are various brackets for this in the hardware store, which we present to you here in the overview.

Various brackets for wooden posts

In the course of time, manufacturers have developed very different post bases, post anchors and sleeves that can be used for very different purposes. Here is an overview:

  • Also read - Fastening Wooden Posts - Various Methods
  • Also read - Putting Wooden Posts - 3 Step Instructions
  • Also read - disguise wooden posts - various solutions
  • L-shaped post base with corrugated steel concrete anchor
  • U-shaped post base with corrugated steel concrete anchor
  • U-shaped post base with concrete anchor corrugated steel with adjustment option
  • Post bracket for screwing on
  • Screw-on sleeve, different sizes
  • U-post base to screw on

Post base with concrete anchor

The post girders, which are inserted into the concrete surface with a concrete anchor, are only connected to the concrete at one point. A correspondingly large and deep hole has to be drilled into the concrete, which has to be filled up with quick-setting concrete. These beams are more suitable in a fresh concrete surface, as they can be concreted in directly here.

Screw-on sleeve

The screw-on sleeve encloses the post on all four sides. The sleeve has a wide rim at the bottom that is screwed to the concrete floor. Especially in stainless steel, this solution is probably the most beautiful option if the sleeve remains visible later. However, the sleeve must always match the strength of the post exactly, as adjustments impair the stability.

Material and surface

Depending on the intended use, the various brackets are usually available in a hot-dip galvanized version or as a stainless steel bracket. If you want to build a high-quality canopy or a winter garden on the wooden posts, you should rather use the respective bracket made of stainless steel. Especially when the post base or the screw-on sleeve remain visible, you should give preference to stainless steel.

Tips & Tricks As a conclusion, it can be stated that with an existing concrete surface it is best to use a screw-on sleeve or a post bracket. Both variants are very stable and can be easily connected to the concrete using dowels and bolts. You should only use a post base that is inserted into the concrete when the concrete is still wet. Then the carrier can be embedded very easily in the concrete.