Create point foundation for garden shed, carport, tool shed or tree house

Create point foundation for garden shed, carport, tool shed or tree house

Anyone who has a garden, which offers a whole host of ways to build projects themselves. A handyman not also lacks ideas! to make garden furniture, tool sheds, carports and garden houses themselves are just a few. but which of course can not be missing is a tree house! Projects like this of course takes the ambitious home improvement into their own hands, but before you can start the construction, once the foundation must be created. In a self-built tree house that can not be attached directly to the tree (size and thickness of the tree may be too low) it is therefore necessary to create footings where the supporting wooden beams via post anchor (H anchors) are concreted. This supports the entire design and makes it more stable.

Contents: Point foundations for Garden House

  • Material and tool requirements
  • How much is a point foundation for a garden shed? calculate screed needs
  • Step 1: Prepare point foundation and posts
  • Step 2: Create Reference Line
  • Step 3: Align Scaffold
  • Mark point foundations with a template Step 4:
  • Step 5: digging point foundations
  • Step 6: Fill Quick concrete and set H-anchor
  • What foundation for a garden shed?

Material and tool requirements


  • Cordless Screwdriver
  • Wrench or ratchet with matching nuts
  • wheelbarrow
  • Bucket and spade
  • watering Can

Working materials:

  • 16x Quick concrete and the screed 40 kg bag (about 4 bags per foundation)
  • 4x post anchor (H-armature 141x600mm)
  • Maurer cord
  • Wooden slats for batter

For such projects footings should be poured from concrete. The use of H-anchors where the wooden beams are bolted, offers itself here. By using post anchors the timber has no direct contact with the ground thereby ensuring good ventilation of the timber. This prevents the rotten wood by moisture and assures a stable and durable construction!

A point foundation or concrete strip foundation created, first the entire foundation must be measured and aligned. The use of a cord scaffold, which is also used in house building used here provides an optimal solution. In this guide, learn tips and tricks on how to create concrete foundations themselves. Whichever garden and / or housing project, a foundation building is exhausting but not complicated. Have fun do it yourself!

The techniques shown for creating point foundations can be for all other projects, like a garden shed, carport or tool shed apply.

How much is a point foundation for a garden shed? calculate screed needs

If the concrete needed to buy in bags, it is important to calculate in advance the demand. For this purpose, primarily the volume required to be determined. If the unit decimeter used spared the subsequent conversions.

10 cm = 1 dm

In the example shown, the size of a point of the foundation is about 30 x 30 x 90 cm. This would correspond to 3 x 3 x 9 dm and a volume of 81 L. Because a 40-kg bag results in concrete or screed about 20 to 22 L, be a foundation for about four bags quick concrete or screed needed.

3 x 3 x 9 = 81 dm dm = 81 liters

81 liter / 20 liter (equivalent to 40 kg bag) = approximately 4 sacs

There are therefore four foundations 16 sacks Quick concrete or concrete slab is required. Screed costs at the hardware store around € 3.20 each 40 kg bag (Bauhaus 8.2017) and H-anchor Amazon 8,60 €.

16 bags of 40 kg concrete screed = 51.20 €

4 post anchors (at Amazon) = 34.40 €

Step 1: Prepare point foundation and posts

Whether the point foundation for a garden shed, carport, tree house or terrace is created in each case, the concrete foundation must be aligned.

First, the positions of point foundations with a string and a few sticks are broadly defined. The dimensions are adapted to the circumstances, in this case a tree house that is built around a cherry laurel with three tribes.

Since the tree itself is sturdy enough not to bear the tree house, four posts foundations for H-anchors are set.

A batter is used in house construction. With it, but can be put foundations in small scale. The parts required can be conveniently made at the hardware store or from wood residues.

Tip: Saw them the posts pointed to, so that they can better drive into the ground.

roughly mark out point foundationroughly mark out point foundationPreparing posts and sharpenPreparing posts and sharpen

Step 2: Create Reference Line

In every corner of a frame of the items will be built. It will be driven into the ground always three piles and these screwed with two cross bars. The whole should have a distance of about 50-80 cm from the center of the marked point foundations. It should be ensured that the devoted from angles close to 90 °.

tipWith a carpenter angle and a straight strip to its extension, the right angle can be aligned easily!

Now the masons string is used. There are four strings needed at each end of which hangs a sufficient weight. If the cords are hung with voltage over the scaffold, this results in a quadrilateral. The batter is ready!

TIP: Easy to use in the weighting of the cords a hammer, wrench, etc. from the tool box!

combine three posts with two slats in every corner.combine three posts with two slats in every corner.four strings are stretched over the crossbars.four strings are stretched over the crossbars.

Step 3: Align Scaffold

Now the square is from Maurer string aligned to the predetermined positions where the posts are anchors later. Thus, the entire garden house foundation is also at right angles, the two diagonals of the quadrilateral are brought to the same level. If both diagonals are equal in length also ensures that everything is at right angles. It may take some time until it fits, but this time you should take!

A wrong set foundation will attract some problems in the construction of it. If the foundation for a garden house is built, difficulties arise later with the statics of the entire structure.

Align Maurer cord according to the measure of the diagonalsAlign Maurer cord according to the measure of the diagonalsAre the same diagonal, right angles are formed.Are the same diagonal, right angles are formed.

Mark point foundations with a template Step 4:

If all the measurements are correct, the final positions of the footings can be set. Simultaneously, the excavation of 300 x 300 mm is selected.

To align the excavation of foundations point correctly, a stencil paper with the dimensions 300 x 300 mm is prepared. In the middle of a stick is inserted and this accurately applied to the desired position. With household flour the contours of the footings are then marked!

A template helps to highlight the point foundation.A template helps to highlight the point foundation.Flour aids in the identification and is biodegradable.Flour aids in the identification and is biodegradable.

Step 5: digging point foundations

Point foundation digging with a spade.Point foundation digging with a spade.

Digging the footings is made with a shovel and a spade. To achieve the frost protection limit, the excavation depth should be at least 80 cm betragen.Die Fundamentttiefe should min. 80-120cm amount.

must in this type of foundation no Gravel are filled before concreting. The footprint is small and waterlogging here represents no danger.

To align the H-anchor later in the point foundations properly, a few tools (wood residues from the workshop or the like) are needed.

If the H-anchor and the necessary pieces of wood are placed rightly already so hectic during the subsequent insertion into the fresh concrete can be avoided.

Step 6: Fill Quick concrete and set H-anchor

The rapid-hardening concrete is mixed according to manufacturer's instructions and poured into the footings. In the hole of the concrete should always be re-mixed with the shovel and slightly compressed. filling the foundation nearly to the brim with concrete. The stencil is again placed and aligned to the batter around the center pinpoint. Now, the H-armature may be placed into the wet point foundation and aligned with the handle down aids "in water".

After 24 hours, the concrete has cured and it can with the actual construction of the garden house (tool sheds, playhouse) be started.

mark the center with reference to the template after filling.mark the center with reference to the template after filling.Insert the H-anchor the center.Insert the H-anchor the center.

What foundation for a garden shed?

Depending on the size, the foundation of a garden house requires a static calculation may. Likewise, the number of point foundations and the depth can vary. In any case, the foundation should be stable just created, and in order to ensure safe construction. This guide shows all the basic techniques to make a point foundation itself. Serves the garden house later than shed, bicycle shed, or the like, and is not to be worked out of the ground. Is a point foundation an inexpensive way to set up bar safe and to protect them against moisture in the soil.

Frank's Shed Woodwork

Have fun playing!

This construction manual was developed in friendly cooperation with Frank's Shed Woodwork.

On his blog, he presents many more projects and documented them extensively in videos.

Buy H-anchor and post support online