ᐅ Supporting a Low Slope – Which Material to Use for a Retaining Wall?

Hello,

We want to support a low slope to the neighboring property so that we can add some fill to our land in that area (see picture). Since the slope is about 1.2m (4 feet) high at its tallest point and slopes diagonally along the boundary, we are considering building a wall about 80cm (31.5 inches) high.

I have done some research and found the following possible materials:
- L-shaped blocks (80cm (31.5 inches) high)
- Retaining wall panels (80cm (31.5 inches) high)
- Concrete form blocks
- Rectangular planter blocks

Because I want to do this kind of support only once in my life, I’m not sure which option really makes sense in terms of cost-effectiveness. It’s possible that a privacy screen could be installed on top of the wall later.

I would appreciate any feedback.

Best regards,
Jochen

L-shaped blocks will likely be too heavy to move using only physical strength. We built up to a height of 2 meters (6.6 feet) using hollow blocks, inserted steel rods, added cement mix, and that was it.

Natural stone wall, for example made of small boulders.
Timelessly beautiful.

@HilfeHilfe: You’re probably talking about formwork blocks?

@Otus11: Absolutely right: a natural stone wall is great. In this case, though, I find it difficult. Eventually, someone might build and possibly block up the wall from the other side or build a garage in front of it. We own the "upper" property, and if I was told correctly, the upper owner has to protect the lower one (?) So I want to build a wall while I still have good access.

No one is required to protect anyone else. The person who excavates must secure the resulting slope. The person who fills must likewise secure the slope created by the fill. If neither applies, there is no obligation to secure the slope (e.g., in the case of natural terrain). For example, we have a slope toward the footpath that is 2.5m (8 feet) high, steep, and unsecured. It does not need to be secured because it is natural terrain on our property. The city did the excavation – it is their problem if rocks fall from the slope onto parked cars below. We have a 1.2m (4 feet) wire mesh fence in front of it, and that’s all.

Regarding the wall: you can also choose nicer stones suitable for slope retention (some are hollow for backfilling). I would decide based on whether I have to look at it every day.

Plant rings are the most cost-effective option, priced at 2 euros each. Plants are not included. Karsten