- 1 Can you pour concrete directly on dirt?
- 2 How deep does a concrete pad need to be?
- 3 Can you pour your own concrete slab?
- 4 How do you prepare the ground for a concrete slab?
- 5 Do I need gravel under concrete?
- 6 Should I put plastic under concrete?
- 7 Can I pour a 2 inch concrete slab?
- 8 How many bags of concrete do I need for a 10×10 slab?
- 9 Do you need rebar for 4 inch slab?
- 10 How much is a 12×12 concrete slab?
- 11 Do I need rebar for small concrete slab?
- 12 What is the cheapest way to pour a concrete slab?
- 13 Is sand a good base for concrete?
- 14 What is the best base for concrete slab?
Can you pour concrete directly on dirt?
Long story short, yes you can pour concrete over dirt.
How deep does a concrete pad need to be?
Standard concrete floor slab thickness in residential construction is 4 inches. Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks. To prepare the base, cut the ground level to the proper depth to allow for the slab thickness.
Can you pour your own concrete slab?
For most do-it-yourselfers, the best material for building a concrete slab is ready-mix crack-resistant concrete mix. The wet mix is poured into a prepared wood form, then left to cure. Two people will mix the concrete in the wheelbarrow, while the third person spreads out the mixed concrete in the form.
How do you prepare the ground for a concrete slab?
Preparation is the most important aspect of pouring a concrete slab.
- Dig the ground down to the proper depth.
- Smooth out the ground with the flat side of a rake so that you have a level surface.
- Tamp the ground with a hand tamper or mechanical tamper.
- Pour 2 inches of small, rounded gravel for additional drainage needs.
Do I need gravel under concrete?
Whether you pour concrete for a walkway or patio, a strong gravel base is required to prevent the concrete from cracking and shifting. Gravel is especially important in clay soil because it doesn’t drain well, which results in water pooling under the concrete slab and slowly eroding the soil as it finally drains.
Should I put plastic under concrete?
Recently, though, research has shown that the old traditional layer of 6-mil Visqueen (polyethylene plastic) under the slab is seldom effective for two main reasons: Although it may seem water-tight, this grade of material allows a lot of water vapor to pass through.
Can I pour a 2 inch concrete slab?
If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.
How many bags of concrete do I need for a 10×10 slab?
For a 10 x 10 slab, you would need 77 60-pound bags or 60 80-pound bags. If we add an extra 10%, that’s an extra 8 60-pound bags or 6 80-pound bags.
Do you need rebar for 4 inch slab?
No, you do not need rebar for a 4–inch slab of concrete on grade. A 4–inch-thick slab cast on the ground and in permanent contact with it will float and rebar is not required. Rebar is recommended on concrete measuring 5 – 6 inches thick.
How much is a 12×12 concrete slab?
To pour a typical 10×10 concrete slab will cost $670 to $930, a 12×12 slab for a patio will cost $796 to $1,476, a 20×24 driveway slab runs between $1,440 and $3,360, and a 24×24 slab for a garage will cost $3,058 to $5,944. Get free estimates from concrete companies near you.
Do I need rebar for small concrete slab?
Rebar is not necessary for every concrete project. The general rule of thumb is that if you are pouring concrete that is more than 5 inches in depth, you are probably going to want to add in some rebar to help reinforce the entire structure.
What is the cheapest way to pour a concrete slab?
One of the least expensive ways to get concrete is to mix your own. You can buy bags of the mix from a home improvement store. Typically, you only have to add water for it to be ready to pour. However, it is important to get the ratio right and to mix the concrete thoroughly.
Is sand a good base for concrete?
Pour concrete over a solid, well-drained base
of sand or gravel over clay and other poorly draining soils to provide even support.
What is the best base for concrete slab?
Most concrete contractors want a mix of coarse and fine aggregate to create a compactable base that is going to be safe for settlement and drainage. Crusher run (a mix of crushed stone and stone dust) is one of the best base materials for concrete flatwork.