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Tips for fundamentering av annekset Casanova


Foundation tips for Outbuilding CasaNova®

To make it easier for you to decide on the best way to erect your Biohort Outbuilding CasaNova, we have prepared some proposals for you regarding foundation design.

Proposal 1: Reinforced Concrete Foundation

A reinforced concrete foundation of a minimum depth of 10cm is without doubt the ideal solution. With this type of foundation you need to make sure that no water can enter the Outbuilding CasaNova at ground level. >> more details here

Proposal 2: Point Foundation

Another useful alternative to ensure the level and storm-proof erection of the Outbuilding on soft and uneven ground is to combine the Biohort Floor Frame with a point foundation. >>more details here

Proposal 1

Concrete foundation

A reinforced concrete foundation is a complex but approved foundation option. This type of foundation provides an even and dry place to secure your outbuilding CasaNova against storm. Screws and plastic dowels are included in the standard delivery.

  • Scoop the building ground to a depth of ca. 60-80 cm (frost-proof depth!)
  • Build a substructure consisting of a ca. 60-80 cm compacted ballast bed (granulation up to35 mm)
  • Install a levelling fill of ca. 3-5 cm (granulation up to 6 mm)
  • Insert a plastic foil (not larger than the concrete foundation, thicknes mind. 150µm)
  • Build the concrete foundation (reinforced with 1-2 sheets of construction steel grids, thickness 10-15 cm).
    Attention: Protection from ingress of rain water is only possible with a circumferential step in the foundation!
  • With this foundation option, you have to ensure, that no water can soak in the ground of the outside area of the Outbuilding.
  • The soil profile should be sealed from the buttom up (in the outer area of the soil profile between the foundation and soil profile) with a metal compatible building sealant (we recommend a permanently elastic butyl sealant).
  • If you want to insulate the ground, we recommend the floor frame. With additional XPS-hard foam panels (ca. 2 to 3 cm), you reach a ground structure with an integrated insulation of 4 cm.

Exterior dimensions concrete foundation:

Shed size

Foundation dimensions (exterior) in cm

3 x 2304 x 204

3 x 3

304 x 304

3 x 4

304 x 404

3 x 5

304 x 504

3 x 6304 x 604
4 x 2404 x 204

4 x 4

404 x 404

4 x 5

404 x 504

4 x 6404 x 604

Concrete foundation plan and sealing information for download:

Proposal 2

Point foundation

Another useful alternative to assure the level and storm-proof erection of the Outbuilding on uneven and soft ground is to combine the Biohort Floor Frame with a point foundation. The foundation points should be positioned at each of the four corners and along the sides underneath each upright. Two point foundations are sufficient at the front and back of the Outbuilding. Dimensions of foundations: 30 x 30 cm with a depth of approx. 80cm.

The effect of moisture rising from ground level can be reduced by laying out a moisture barrier in the form of plastic sheeting. This must be laid out across the top of the point foundation and over the complete area of the Outbuilding. 

The Outbuilding shall be erected onto the Floor Frame and attached to the foundation with the materials provided.

External dimensions Point Foundation:

Outbuilding size

Width in cm

Depth in cm

3 x 2 307 207

3 x 3

307

307

3 x 4

307

407

3 x 5

307

507

3 x 6 307 607
4 x 2 407 207

4 x 4

407

407

4 x 5

407

507

4 x 6 407 607