Strip foundation for the garage - A guide


Above all, a stable garage needs one thing: a solid foundation. To create a sufficiently stable, frost-free foundation, the concreting of a strip foundation is ideal. Here is a guide to it.

Background information

Basically, a continuous floor slab would be suitable in the appropriate strength, but it is better to reinforce this floor slab in addition by foundation strips in the area of ​​the outer walls of the planned garage and above all to make frost-resistant.

Plan the foundation correctly

The thickness of the base plate depends mainly on the expected structural loads, which must be derived from the foundation into the ground. A structural engineer or architect can specify reliable values ​​for each type of construction. The foundation strips should lie in the area of ​​the outer walls of the garage, and be slightly wider than this if possible.

Reinforcements can but do not have to be used. As a rule, however, mild steel mats are recommended within the floor slab.

Step-by-Step Guide

  • Gravel for cleanliness layer
  • Concrete, supplied by the concrete plant, in matching quality
  • Maurer cord
  • PE film
  • wooden stakes
  • Shuttering boards or elements lost formwork
  • Reinforcement mats and ev. Reinforcement baskets for foundation strips
  • rüttelplatte
  • concrete Stampfer
  • straightedge
  • spade

1. Stake the foundation

According to the foundation plan, first cut off the measurements for the floor slab with the help of a scaffolding board made of bricks and wooden pegs. In the area of ​​the foundation slab, remove about 20 - 30 cm of ground, the foundation strips must be excavated at least 80 cm deep, so that they are actually frost-proof.

If you want, you can also put reinforcement baskets in the foundation shafts, but this does not necessarily have to be.

2. Create a cleanliness layer

Apply a clean layer of compacted gravel to the floor slab and cover with PE foil.

3. Make formwork and pour the foundation

Now set up the formwork for the base plate and lay out the reinforcement mats, which you then connect with steel wire. You can use a so-called permanent formwork with plastic elements instead of formwork boards, which then no longer have to be removed after casting. Then you also have to attach the reinforcement mats to the formwork elements.

Then you can pour the foundation already. Make sure the concrete is evenly distributed and compact it evenly. After casting, you should once again smoothly remove the concrete, cover it with building foil and strictly adhere to the prescribed drying time before further processing.

Tips & Tricks

If you use a shovel to pierce the concrete during casting, air bubbles may escape and the concrete will not retain trapped air - which increases its carrying capacity.


Video Board: Concrete Footer Part 1