ᐅ Building a Retaining Wall in the Garden: Formwork Blocks or L-Shaped Blocks?
Created on: 24 Dec 2023 10:19
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BiffBiff
In the garden, we need to build a retaining wall along 20 meters (65.6 feet). It will have a height of 1-1.2 meters (3.3-3.9 feet) and must hold back the soil on the property. It will only be supporting the garden. No road or building needs to be supported.
1) Which type of wall is more suitable? What are the advantages and disadvantages of a retaining wall with L-shaped blocks versus formwork blocks that are filled with concrete?
2) How should the foundation be prepared? Should it be gravel or a strip concrete foundation (how deep)?
3) What is the approximate cost per linear meter? Does anyone have relatively recent experience?
1) Which type of wall is more suitable? What are the advantages and disadvantages of a retaining wall with L-shaped blocks versus formwork blocks that are filled with concrete?
2) How should the foundation be prepared? Should it be gravel or a strip concrete foundation (how deep)?
3) What is the approximate cost per linear meter? Does anyone have relatively recent experience?
WilderSueden schrieb:
It’s best to coordinate with your neighbor. If both of you significantly deviate from the original terrain, it also makes sense to share the costs and secure it only once. We deviate about plus 1 meter (3 feet) from the natural ground level, the neighbor about minus 2 meters (6.5 feet)...
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jens.knoedel24 Dec 2023 14:57BiffBiff schrieb:
I imagine this is difficult since the neighbor has dug away the land quite steeply right at the property boundary and hasn’t stabilized it. I’m afraid I won’t be able to avoid a concrete foundation even for the L-shaped retaining walls. Then it wouldn’t be you placing the blocks, but the neighbor.
BiffBiff schrieb:
We deviate about +1m (3 feet) from the natural terrain slope, the neighbor about -2m (6.5 feet)... So a 3m (10 feet) height difference? The initial post says something different.
Please also keep drainage in mind, especially with L-shaped retaining walls.
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Benutzer 100124 Dec 2023 15:23Have you ever done something like this? A 1.2-meter (4 feet) foundation easily requires 6 cubic meters (210 cubic feet) of concrete—you first have to mix that much, then move the blocks around, which really builds muscle.
My tip: dig 60-80 cm (24-31 inches) deep. Place 40 cm (16 inches) of crushed stone, then at least 20 cm (8 inches) of concrete—you should have this delivered. Set the first row directly into the wet concrete. After a few days, lay the next rows and fill with a mixer.
If you work quickly, you can finish it within a week.
My tip: dig 60-80 cm (24-31 inches) deep. Place 40 cm (16 inches) of crushed stone, then at least 20 cm (8 inches) of concrete—you should have this delivered. Set the first row directly into the wet concrete. After a few days, lay the next rows and fill with a mixer.
If you work quickly, you can finish it within a week.
jens.knoedel schrieb:
Then it won’t be you laying the stones, but your neighbor.
So a 3m (10 ft) height difference? The original post says something else.I am adding about 1 meter (3 ft 3 in) of fill, and I need to retain that. The other person has excavated about 2 meters (6 ft 6 in) and still needs to retain it. So far, he hasn’t done that. But why should I do that on his property?
Offtopic schrieb:
Ever done something like this? 1.2 meters (4 feet) with foundation easily means 6 m³ (212 ft³) of concrete—you first have to mix that much, then move the blocks, that builds muscle.Yes, I’ve done it for 3 meters (10 feet) before, it took about 1.5 hours of work, at least for the filling part.W
WilderSueden25 Dec 2023 08:33BiffBiff schrieb:
I’m raising the ground by about 1 meter (3 feet), and I need to retain it. The other person has dug down about 2 meters (6 feet) and still needs to retain their excavation. They haven’t done that yet. But why should I do that on their property? The issue is that the forces from your retaining structure will act on theirs. Unless you both build them far apart—which probably no one wants. If you both build close to the boundary, it’s also questionable whether the person on the lower side can still build once the upper side is already built. For a total height of 3 meters (10 feet), such work needs proper planning and engineering calculations.
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