concrete foundation

Concrete foundation with step

A reinforced concrete foundation on a grave base is a high-quality foundation option.

The soil is dug out frost-proof (approx. 60-80 cm deep, depending on the region), then the excavation is filled with gravel (grain size up to 35 mm) and compacted. This is followed by an approx. 3-5 cm thick levelling fill with gravel (grain size up to 6 mm), the vapour barrier (plastic sheet with a thickness of at least 150μm) is laid into this levelling fill. The concrete foundation with 1 to 2 layers of structural steel grid is erected on top of this - the thickness of the concrete slab should be approx. 10 - 15 cm.

The stepped foundation pad, with a circumferential step of 2 cm x 7 cm, is an ideal design. The floor profile is attached to the underground using the screws and anchors included in the delivery.

Please note that it is not possible to use the aluminium floor frame for the step-shaped concrete foundation. Furthermore, no application of a sealing compound is necessary for sealing.

1. Frost-proof excavation of the building site
2. Set up the gravel base
3. Fill with gravel
4. Lay vapour barrier
5. Pour the foundation

Alternative: flat concrete plate without step

As an alternative to the concrete foundation with the step-shaped surface, a continuous flat concrete slab can also be poured.

The construction is carried out - except for the step in the foundation - as with the concrete foundation described above with the offset foundation plate.

The aluminium floor frame, available as an accessory, makes it easier to level out any unevenness in the floor and to fit the sealing joint. The aluminium floor plate (lined with 2-3 cm thick XPS hard foam panels) can be installed using the aluminium base frame.

1. frost-proof excavation of the building site
2. Set up the gravel base
3. Fill with gravel
4. Lay vapour barrier
5. Pour the foundation

Please also note the above mentioned concrete foundation plans for this option.