ᐅ Material to fill the approximately 2-meter-deep space beneath the new terrace

Created on: 4 Mar 2021 08:28
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theChaoZZ
Good morning,

In spring, a new terrace will be built next to our house.
Currently, there is a room under this terrace with a 5,000-liter (1,320-gallon) oil tank, which will be removed soon since we are switching to gas heating.
I want to fill and compact this room (2 meters deep (6.6 feet); 2.5 meters wide (8.2 feet); 3.5 meters long (11.5 feet)) so that we can later lay terrace slabs on a gravel bed above it.

My question is about the appropriate material to fill this space.
The terrace should not sink later on the compacted base. Of course, the terrace slabs will still have their own separate gravel and crushed stone bed.

- According to online sources, a mineral material is definitely recommended. Crushed stone would be suitable here.
The angular stones interlock when compacted, providing stability.

- A friend recommended sand as a filling material, since it prevents air pockets.

What would you recommend?
A
apokolok
7 Mar 2021 21:38
I don’t understand the purpose of the action at all.
The space is more than sturdy enough for a terrace, so you don’t need to fill it in.
On the contrary, you have a level, stable base. Just put gravel and terrace flooring on it, and you’re done—couldn’t be easier.
Is this a basement room? You can definitely make use of it.
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theChaoZZ
8 Mar 2021 07:29
Good morning,

thank you very much for the many knowledgeable answers.
The hole will be filled by a construction company. They have an easier time with it than I do :-)
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theChaoZZ
8 Mar 2021 07:33
@apokolok: There is a 5,000-liter (1,320-gallon) steel oil tank in the room that needs to be removed. The ceiling will have to be opened for this. Since the room is very damp and I don’t need it, it will be filled in.
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theChaoZZ
11 Mar 2021 12:03
Hello guys,
I need some expert advice.
I have a fixed quote to fill and compact the pit with 25 tons of recycled concrete for €2000 + VAT (within one day) – including excavator transport to and from the site.
If I fill it myself (estimated 3 days), including materials, renting a Bobcat and a compactor, it would cost me €1200.

Would you simply pay the €2000 + VAT to have it done quickly, or would you rather do it yourself over three days and save about €1000?

Thanks in advance :-)
Nida35a11 Mar 2021 12:09
If the 3 days don’t bother you, you feel over 20, and you’re up for hard work, do it yourself.
With the money saved, buy shoes or a grill from the parallel thread.
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bernie
11 Mar 2021 12:30
theChaoZZ schrieb:

Hello guys,
I need some expert advice.
I received a fixed quote to fill and compact the excavation pit with 25 tons of concrete recycling for €2000 + VAT (within one day) – including excavator transport to and from the site.
If I do it myself (estimating 3 days), including materials, renting a Bobcat and a compactor, it would cost me around €1200.

Would you simply pay the €2000 + VAT to have it done, or would you rather do it yourself over three days and save about €1000?

Thanks a lot 🙂

I would do it myself.