Best answer

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..

Answered by: mickmackusa Date created: Jun 23, 2022

How many bags of concrete do I need for a 6x6 slab?

Asked By: James111 Date created: Jun 22, 2022

0.667 cu. yds. How many concrete bags would I need for a 6 ft x 6 ft x 6" slab? 29.9 x 80lb Concrete bags.

Answered By: Yahya Uddin Date created: Jun 25, 2022

Do you need stone under a concrete slab?

Asked By: Matt Date created: Jun 16, 2022

Because concrete is a very porous material, it will absorb any moisture that it contacts. This can cause pooling. Without crushed stone, pooling water will settle under it and erode your slab. Adding a layer of crushed stone will add proper drainage, as well as create a barrier between your slab and the ground.

Answered By: Guerric P Date created: Jun 16, 2022

How many bags of concrete do I need for a 4x8 slab?

Asked By: assylias Date created: Jun 25, 2022

Your project is 32 square feet at a depth of 4”. Here is the quantity that you will need for your slab. Quikrete Concrete Mix: 24- 60lb bags.

Answered By: Jonathan Fingland Date created: Jun 27, 2022

Can I pour my own concrete slab?

Asked By: toolic Date created: Jun 19, 2022

Pouring a concrete slab yourself can be a big money-saver or big mistake. We show you the best techniques and tools so you get concrete forms right the first time.

Answered By: EpicPandaForce Date created: Jun 19, 2022

How much concrete do I need for a 12x20 slab?

Asked By: seangwright Date created: Jun 11, 2022

Concrete Extras With a brief look, a 12x20 area at 6 inches deep, you would need approximately 6.31 tons or 4.44 cubic yards of gravel. Concrete reinforcing is also recommended in high traffic areas and medium to large areas.

Answered By: cronoik Date created: Jun 11, 2022

How do I keep my concrete slab from sinking?

Asked By: cdhowie Date created: Jun 24, 2022

How can I prevent my concrete from sinking?Seal all open cracks and joints with a polyurethane or silicone caulk. ... Make sure downspouts are discharging at least five feet away from any concrete slab – the farther the better.More items...•

Answered By: Alexander O'Mara Date created: Jun 24, 2022

How do I get rid of rats under my concrete slab?

Asked By: DisgruntledGoat Date created: Jun 08, 2022

Answer: If the patio slab is not connected to the house slab you can use a Giant Destroyer to help eliminate the rat. If there are many tunnels or if it is in an area where you cannot seal up the entrances you may want to consider using rat poison baits instead such as Fastrac or Contrac.

Answered By: Sam Harwell Date created: Jun 10, 2022

How do you prepare for a concrete slab for a shed?

Asked By: John La Rooy Date created: Jun 17, 2022

How to Pour a Concrete Slab for a Shed [Complete Guide]All you need to do is stake out your site, remove the topsoil, build and level your forms, spread and compact 4” to 6” gravel, lay out some rebar, and you're all set to pour your concrete slab.All storage sheds should have a foundation; whether pier, gravel or concrete.More items...

Answered By: DaveShaw Date created: Jun 20, 2022

How many bags of concrete do I need for a 4x4 pad?

Asked By: rob mayoff Date created: Jun 13, 2022

The calculator will indicate the number of 60 or 80 pound bags of QUIKRETE® Concrete Mix you need to build a 4″ or a 6″ slab.

Answered By: coderanger Date created: Jun 14, 2022

Can you run a gas line under a concrete slab?

Asked By: Marlon Richert Date created: Jun 14, 2022

Otherwise you could bury a pvc pipe in the concrete to run your gas line thru. Yes, you can bury the gas line. First I would bury a straight pipe larger than your gas line under the patio and then run the gas line in the pipe. If you ever need to replace the gas line it will be easy to remove.

Answered By: Clemens Date created: Jun 16, 2022

Related Question Answers

Michiel Borkent

Professor

How many yards of concrete do I need for a 16x16 slab?

With a brief look, a 16x16 area at 6 inches deep, you would need approximately 6.73 tons or 4.74 cubic yards of gravel. Concrete reinforcing is also recommended in high traffic areas and medium to large areas.

kimbaudi

Professor

Do I need rebar for small concrete slab?

You do not need rebar for any slab if you make it thick enough and space the joints properly. Rebar in jointed pavement is there to counter the cupping effect of thermal expansion. I always recommend the use of rebar or at least rewire. Any concrete slab can crack.

coroutineDispatcher

Professor

How much cement do I need for a 20x20 slab?

With a brief look, a 20x20 area at 6 inches deep, you would need approximately 10.52 tons or 7.41 cubic yards of gravel. Concrete reinforcing is also recommended in high traffic areas and medium to large areas.

bikram

Professional

Can I pour concrete under water?

The good news is that you can pour the concrete in water. ... The biggest issue with pouring concrete under water is movement. If the water is moving, it can wash away the cement paste that's holding the sand and gravel together. But if the water is calm, then it's not a problem at all.

Dan Lenski

Professional

How do you install moisture barrier under concrete slab?

Most exterior slabs do not need a vapor barrier. ... In general, place the concrete slab directly on top of the vapor barrier, with the subbase below. ... The vapor barrier can be placed under the subbase, if the building is closed in when the dry subbase material is placed.More items...

ksav

Professional

Do I need mesh in my concrete slab?

Concrete is strong in compression, but not under tension. So, if it flexes, like a slab with a vehicle on top of will do, it cracks at the bottom whre the flexing becomes tension. ... Mesh will help mitigate the chances of cracking of the slab due to differential settlement.

Mark O'Sullivan

Professional

Do I need to acid etch concrete after grinding?

Under ideal circumstances, acid etching works to expose the pores of the concrete. However, acid etching won't remove glues, mastics, caulk, and common stains, If your floor is marred or stained by these substances, you'll need to resort to grinding at least part of your floor.

wazz

Professional

Do I need to seal my concrete garage floor?

Because garage floors are protected from outdoor elements, they don't generally need sealed as often as a concrete driveway. However, most garage floors are made from concrete, making them susceptible to cracking and moisture intrusion from oil spills, antifreeze leakage, and other household chemicals.

BatyrCan

User

Do I need a permit to pour concrete in my back yard California?

In regards to your question, under the 2002 County of Los Angeles Building Code, section 106.3(15) states that a building permit shall not be required for “Platforms, walks and driveways not more than 30 inches (762mm) above grade and not over any basement or story below,” and as such, the driveway construction method ...

Matt Hamilton

User

How do I stop my concrete sinking?

How can I prevent my concrete from sinking?Seal all open cracks and joints with a polyurethane or silicone caulk. ... Make sure downspouts are discharging at least five feet away from any concrete slab – the farther the better.More items...•Dec 21, 2018

Obsidian Age

User

How much concrete should I get around my pool?

Table and chairs for up to eight requires a minimum 12' x 12' concrete slab. Small end tables and chairs do vary on size of the table. For concrete purposes we generally recommend 5' x 5' concrete slab. Tanning lounger/ Chaise loungers need a minimum of 8' of concrete off of the swimming pool.

laukok

Guest

Can I cement my whole backyard?

In general, if you are doing any work which is going to modify your floor plan, then, you do need a permit. If you are going to pour concrete for a patio in your backyard, then, yes, you do need a permit.

Hooked

Guest

Do you need a concrete slab for a hot tub?

A hot tub requires a stable surface — whether it's a concrete slab, reinforced deck, or firmly compacted soil with crushed gravel.

There's also the option to have the hot tub installed in the ground but that still requires a concrete vault..

Jamie Hutber

Guest

Do I need insulation under a concrete floor?

Creating an insulation layer and a vapor barrier between the concrete slab and the ground beneath it is the best practice in insulating basement floors.

The insulation barrier will help keep warm air in, and the vapor barrier will keep unwanted moisture out..

Guillaume Vincent

Guest

How much insulation do I need under a concrete floor?

A 50mm thick layer of proprietary floor slab insulation is usually enough to reach and maintain the target U value but this should be checked with an architect first. Insulation sheets should be laid tightly together with the joints staggered to avoid movement.

Andrew Eckart

Guest

What is the best insulation for under a concrete slab?

Applying a bead of polystyrene-compatible caulk or mastic to the top of the insulation board minimizes water infiltration behind it. For under-slab applications, the rigid foam insulation typically should be installed over a gravel base, with a poly vapor diffusion retarder between the gravel and insulation.

cyberwombat

Guest

What do you put under concrete blocks?

To create the base, spread a 4-inch layer of gravel over the excavated area. Level the gravel, following the initial grade, and cover it with a 1-inch layer of sand. Tamp the gravel and sand down with a plate compacter before laying the blocks.

Tadeck

Guest

Can I use sand under concrete slab?

Pour concrete over a solid, well-drained base Because concrete slabs “float” on the soil, soft ground or voids underneath may cause unsupported areas to crack under heavy weight like vehicles. Pack about 4 in. of sand or gravel over clay and other poorly draining soils to provide even support.

Carl Zhao

Guest

Do I need gravel under concrete footing?

Registered User. permanent wood foundations require gravel, not concrete or soil for the footings - every situation is a little different, but all footings need to bear on the soil/gravel/bedrock/ whatever is supporting the structure equally, or it's going to settle at different rates.

VitalyB

Guest

Do I need DPM on concrete floor?

Do I need a DPM under laminate flooring? Simply put yes. In order to prevent damp rising through the concrete floor and causing issues, a DPM should be used under all final floor types including wood flooring, laminate, vinyl and floor tiles.

bobobobo

Guest

How do you break concrete slab by hand?

InstructionsDig Under the Concrete. Dig out the soil, gravel, or other material from under the concrete, using a shovel and a pickax. ... Strike the Concrete. Lightly sprinkle the concrete with water to minimize dust. ... Pry Off Stubborn Pieces. ... Move the Concrete Chunks With a Hand Truck.Feb 19, 2020

serge

Guest

Do I need concrete reinforcing mesh?

And yes, mesh is important: Concrete is strong in compression, but not under tension. So, if it flexes, like a slab with a vehicle on top of will do, it cracks at the bottom whre the flexing becomes tension. Steel mesh will prevent this to a large degree and hold it all together.

Bassetassen

Guest

Do I need to cut my concrete slab?

“The minimum depth of sawcut using a wet conventional saw should be the greater of at least 1/4 of the slab depth or 1 in. (25 mm). The minimum depth of sawcut using an early-entry dry-cut saw should be 1 in. ... Some slab designers require cutting the slab the following day to 1/4 of the slab depth to deepen the 1 in.

Abhijit Sarkar

Guest

Do I need to reinforce my concrete slab?

Concrete is an incredibly resilient material, which is why it's used so much in building and construction work. However, some types of concrete structure require reinforcements, which are often put in place as the mixture sets.

Dan Guzman

Guest

Do you need concrete under pavers?

Installing pavers is very similar to concrete installation. You must start with a solid base and foundation. Most frequently, this involves digging down into the ground and removing the existing dirt and replacing it with gravel and sand.

Waldi

Guest

Do you need gravel under a concrete patio?

Yes! A strong gravel base is required when building a concrete patio in order to prevent the concrete from shifting or cracking. Adding gravel under the concrete also provides a level surface for your foundation and adds proper drainage when there is pooling water.

Acorn

Guest

Do you need gravel under concrete footing?

Registered User. permanent wood foundations require gravel, not concrete or soil for the footings - every situation is a little different, but all footings need to bear on the soil/gravel/bedrock/ whatever is supporting the structure equally, or it's going to settle at different rates.

Nick Grealy

Guest

Do you need sand under concrete slab?

One reason it is used as a backfill or sub-grade material. As with all material, it has to be placed correctly and compacted properly. Sand needs to remain damp as well as other material before placement of the concrete. If you want to build a road, use gravel, but this does not mean you will not have issues.

billz

Guest

How do I remove concrete from my lawn?

Steps for Removing a Concrete SlabStep 1: Create a Void Under the Concrete. The best way to speed up concrete removal is to create a void underneath the section of slab you're working on. ... Step 2: It's Hammer Time. ... Step 3: Pull Apart and Remove the Broken Concrete. ... Step 4: Repeat Steps Until Concrete Is Demolished.Jan 16, 2019

Hans Olsson

Guest

How many bags of concrete do I need for a 12x12 slab?

Enter the size of the slab you want to build in square feet. The calculator will indicate the number of 60 or 80 pound bags of QUIKRETE® Concrete Mix you need to build a 4″ or a 6″ slab. (All yields are approximate and do not include allowance for uneven subgrade, waste, etc.)

Nicolai Parlog

Guest

How do you break concrete by hand?

InstructionsDig Under the Concrete. Dig out the soil, gravel, or other material from under the concrete, using a shovel and a pickax. ... Strike the Concrete. Lightly sprinkle the concrete with water to minimize dust. ... Pry Off Stubborn Pieces. ... Move the Concrete Chunks With a Hand Truck.

monkut

Guest

Should I insulate under my concrete slab?

Creating an insulation layer and a vapor barrier between the concrete slab and the ground beneath it is the best practice in insulating basement floors. The insulation barrier will help keep warm air in, and the vapor barrier will keep unwanted moisture out.

Aakash

Guest

How many bags of cement do I need for 1 yard?

5 Bags# It takes approximately 5 Bags of Portland cement, 8 cubic ft of sand, and 20 cubic ft of gravel to make approximately 1 cubic yard (27 cubic feet) of concrete.

Robin De Schepper

Guest

How many concrete stamps do I need?

How many stamps do I need for my project? Take your dimensions of your project and figure out which direction you will run your stamps. Next measure what your longest run will be. Ideally you want the enough stamps to cover your first row and 2 stamps for the second row.

Dax Feliz

Guest

How much cement sand and gravel do I need?

An average 1:2:3 mix contains one part cement, two parts sand and three parts gravel. To make 1 cubic yard of concrete, you'd need seven 94-pound bags of cement, about 1/2 cubic yard of sand and just over 3/4 cubic yard of gravel. The amount of water you use depends on how wet the sand is.

Triptych

Guest

Can I pour cement over gravel?

Laying a concrete driveway over an existing gravel one is possible, but it is not generally recommended. ... The kind of gravel that is intended to go under cement is typically a smaller grade than what is used for gravel driveways.

marsze

Guest

How do I get rid of snakes under my concrete porch?

Snake Under a Shed, or Under the House, Deck, or PorchCall a pro: The best way to get rid of snakes under a house or other building is to hire a professional, especially if it is large or poisonous. ... Trim plants: ... Instal a snake fence around the perimeter of the shed: ... Use repellents? ... A dog or cat: ... Rodent control under the house:

T.Todua

Guest

Do I need gravel under concrete slab?

You do need gravel under a concrete slab, footing, or patio. Gravel provides a solid foundation for your concrete as it can be compacted. It also improves drainage, preventing water from pooling beneath the concrete.

SFun28

Guest

Do I need steel mesh in my concrete slab?

No, they do not. Larger projects or slabs may need steel reinforcement to provide support or extra strength. Wired mesh can also help resist cracking. However, not every piece of concrete necessarily requires that extra boost.