Best answer

In California they place sand between slabs and plastic vapor barriers—in Florida they don't. Almost everywhere (except “California”) that slabs are placed on the ground—a plastic sheet—a vapor barrier—is located directly under the concrete slab and on top of the ground (Photograph 1).

Answered by: yojimbo87 Date created: Jun 26, 2022

Do you need stone under a concrete slab?

Asked By: OscarRyz Date created: Jun 12, 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: Sachila Ranawaka Date created: Jun 12, 2022

Can you pour concrete on clay?

Asked By: Konrad Rudolph Date created: Jun 23, 2022

Unfortunately, if you have clay-heavy soil, then you may run into difficulty when pouring a slab. The clay can compress under the weight of the concrete, causing the slab to shift or sink over time. With proper preparation, however, it's possible to pour a slab on clay soil without encountering these problems.

Answered By: Kousha Date created: Jun 24, 2022

Can you put cement in wet ground?

Asked By: Jared Rummler Date created: Jun 09, 2022

The water in the hole under the pipe can be sucked out with a wet-dry vacuum before and during the repair job.

Answered By: add-semi-colons Date created: Jun 09, 2022

How do you run a pipe under a concrete slab?

Asked By: AbdulMomen عبدالمؤمن Date created: Jun 19, 2022

In six simple steps you can dig under concrete:Attach drill pipe.Connect garden hose.Dig a small ditch.Start your bore.Add more drill pipe (if necessary).Pull piping through.

Answered By: Vineet Reynolds Date created: Jun 19, 2022

How do you termite proof a concrete slab?

Asked By: Allan Chain Date created: Jun 08, 2022

To make a concrete slab as termite proof as possible, it is best to use a combination of both physical and chemical barriers to augment its strength. While a builder will be able to put physical barriers in place, chemical barriers can only be installed by licensed pest controllers.

Answered By: ligi Date created: Jun 09, 2022

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

Asked By: Marcus Lind 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: trusktr Date created: Jun 11, 2022

Should concrete patio be attached to foundation?

Asked By: synthesizerpatel Date created: Jun 12, 2022

No, dont attach the slab to the house. Unless you put down a foundation, the slab will rise and fall with 'frost freeze'.. And, it 'will' crack your foundation.

Answered By: Chamod Dissanayake Date created: Jun 14, 2022

How do you run wires on a concrete wall?

Asked By: Matchu Date created: Jun 20, 2022

You need some plastic anchors, you can see some here. You can buy mortar screws that come with plastic anchors. Simply drill a hole into the concrete with a a concrete bit and then glue the plastic anchor into the hole then drill the screw into the plastic anchor. You can get ones with a cable brackets.

Answered By: Antwane Date created: Jun 22, 2022

How much does it cost to replace a sewer line under a concrete slab?

Asked By: mkasberg Date created: Jun 17, 2022

The cost to replace a sewer line under a slab costs $3,000 to $5,000 for smaller jobs and $15,000 to $20,000 total for larger jobs.

Trenching under a slab can cost an extra $150 to $200 per foot..

Answered By: Todor Date created: Jun 18, 2022

What do you put on concrete floor before laminate?

Asked By: Rob Raymond Date created: Jun 10, 2022

Begin installation by laying a plastic vapour barrier (minimum 6 mm thick) or any other manufacturer-recommended barrier on the concrete subfloor to prevent moisture from reaching the laminate flooring. Use vinyl tape to secure the barrier and keep it from coming out.

Answered By: Chase Florell Date created: Jun 10, 2022

Related Question Answers

catavaran

Professor

Do you need to put a vapor barrier behind cement board?

You should NOT place a vapor barrier BEHIND the backer board. Where, pray tell, would any such collected vapor/water go? Answer:There's nowhere proper for such moisture to egress. The current best practice is to place waterproofing OVER the backetboard and just UNDER the tile.

avdeluca

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How can you tell if a concrete floor is dry?

To use this method, ASTM D 4263, “Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method,” a plastic sheet is tightly taped to the concrete. After 72 hours, a humidity reading is taken under the plastic with a dew point hygrometer.

Phillip Cloud

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What do you put behind cement board in shower?

Cement Board and a Liquid Membrane No plastic sheeting goes behind the cement board.

A liquid waterproofing membrane, such as RedGard or Hydro Ban, is applied to the cement board and allowed to cure.

Then, tile is installed over the membrane..

Matchu

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What do you put on concrete floor before vinyl?

Perhaps the easiest way to improve the insulation of a floating vinyl floor on concrete is to install a thermal underlayment, preferably made of cork, felt or a similar material. If you use an underlayment without a moisture barrier, it's a good idea to install a sheet of plastic below it for insurance.

Jon Lin

Professor

Can I mix cement in a bucket?

If you need to mix concrete by hand, there are two options: ... It has all the ingredients dry mixed together for making concrete, i.e. the cement, sand and stone. All you have to do is put it into a bucket, wheelbarrow or on a piece of plastic on the ground, add water and spend a few minutes mixing it.

FDuhen

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Do you put cement board under a shower pan?

Once the subfloor of proper thickness is properly installed then you can apply cement board directly to the subfloor material. ALL CEMENT BOARDS MUST be installed in a fresh bed of thinset. ... If you want the cement board under the shower tray then do so - doesn't matter.

Michael - sqlbot

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Can concrete cure under water?

Water Cure Concrete made with Portland cement will harden even if it is completely under water.

In fact, one technique for curing a concrete slab is to build a soil dam around the perimeter of the slab, flood the slab with water and keep the slab covered with water for a week..

Anthony Kong

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Can you put concrete in plastic?

According to principal investigator Dr John Orr, introducing synthetics like plastic into concrete generally weakens the material, as plastic doesn't bond to the cement mix like sand does.

EricLavault

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How do I find a water leak under a concrete slab?

Signs Of A Leak Under Concrete1). There is water or damp spots on your floor. If hot-water lines are leaking, this may also lead to warm spots on your floor. ... 2). You can hear the sound of rushing water underneath your floor. ... 3). There is a significant increase in your water bill.Jan 10, 2021

Georgy

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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...

bodacydo

User

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.

Martin

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How do you keep water from seeping on concrete floor?

Plastic drainage mats, or dimple mats, allow air to circulate under the flooring and provide a moisture barrier.

They also provide an insulating layer of air that separates the floor from cold concrete, reducing the potential for moisture damage from condensation or water vapor migrating through the concrete..

ahajib

User

How do you mix concrete in a bucket?

Buy a bag of pre-mixed concrete (drymix). It has all the ingredients dry mixed together for making concrete, i.e. the cement, sand and stone. All you have to do is put it into a bucket, wheelbarrow or on a piece of plastic on the ground, add water and spend a few minutes mixing it.

Radim Köhler

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How do you polish a small concrete area?

A small section of concrete can be polished with a hand sander.Vacuum the area thoroughly to remove all dust and debris. ... Cover any vents and under doorways with plastic sheeting and low-tack painter's tape. ... Attach the appropriate sanding disk to the handheld grinder.More items...

The Unfun Cat

User

How do you protect concrete bags from rain?

Indoor Concrete Bag Storage Ideally, you should store the bags in a dry and enclosed structure to protect them from rain and moisture. When storing stacked concrete bags for the long term, one idea is to put the smaller bags into an oversized plastic bag and tightly seal it.

D_Pain

Guest

Does concrete stop radon?

Remember that even several inches of concrete cannot stop radon. Some builders believe that the plastic vapor barrier under the slab will stop radon. Although it is a part of the "radon resistant" construction, it merely reduces the flow of soil gas.

Dinah

Guest

Can I plaster over electrical cables?

No problem plastering straight over cables but if you think you might ever want to pull them out put some plastic capping over them first.

Nathan Fellman

Guest

How do you run a conduit under a concrete slab?

Select a pipe of sufficient diameter for the desired excavation width. ... Dig a small trench on each side of the concrete slab. ... Measure the width of the concrete slab. ... Push the angled end of the PVC pipe into the soil in the trench on one side. ... Tap the other end of the PVC pipe with your sledge hammer.More items...

user3142695

Guest

Can you mix concrete by hand?

If you need to mix concrete by hand, there are two options: ... It has all the ingredients dry mixed together for making concrete, i.e. the cement, sand and stone. All you have to do is put it into a bucket, wheelbarrow or on a piece of plastic on the ground, add water and spend a few minutes mixing it.

nem035

Guest

Can you put ceramic tile on concrete basement floor?

A: It's perfectly acceptable to put tile directly on concrete — with a couple of caveats. First, it is important to determine if there is moisture coming up from the slab. You can test for moisture by taping all four sides of 18-by-18-inch polyurethane plastic on the slab.

Arthur Rubens

Guest

Can you run water pipes in a concrete floor?

During the initial building of a home that has a concrete slab foundation and basement level, any plumbing that runs under the home must be put in before the concrete is poured, since the plumbing runs in the dirt, not within the actual concrete.

Ângelo Polotto

Guest

How do you fix a void on a concrete slab?

– Sand-Cement Grout A sand-cement grout can be used to fill voids under concrete slabs. This mix of sand, cement, and water is pumped through holes drilled to fill up the voids. While this method of slab jacking is cost-effective, there are major drawbacks to opting for this type of repair.

HockeyJ

Guest

Should I put plastic behind cement board?

No plastic sheeting goes behind the cement board. A liquid waterproofing membrane, such as RedGard or Hydro Ban, is applied to the cement board and allowed to cure. Then, tile is installed over the membrane.

Bhishan Poudel

Guest

Do I need to line a concrete planter?

Probably a layer on top of the plastic is better - it will certainly help to prevent soil clogging the drainage holes. ... Even if you do drill through the old concrete the boxes will not drain as quickly as if they are on earth. Put as many drainage holes in as you can especially if you line the sides.

Hot Licks

Guest

Can you put footings under concrete slab?

edit - To put footings under the slab, you can cut holes wherever needed, excavate for footings (Sonotubes or concrete piers or similar) and then patch the concrete slab.

djvg

Guest

Do you have to put Thinset under cement board?

No Thinset underneath the backer board “The thinset goes ON TOP of the cement board to stick the tiles!” ... Cement board is a different product and it needs to be installed in its own way. Additionally, screws don't take the place of thinset either.

Casebash

Guest

What do you put under a concrete driveway?

Use wire mesh for driveways that are 4 to 5 inches thick, and rebar for those that are 5 inches or more. Place rebar in a grid pattern with a spacing between bars of approximately 12 inches. In either case, blocks should be used under the reinforcement to keep centered within the concrete.

Baba

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.

Vilx-

Guest

Why do people put plastic sheets on concrete roads?

1.It avoids the possibility of active aggressive agents from soil water being attached to the concrete slab. 2.It prevents the loss of water from cement paste which affects the strength of concrete slab.

Derviş Kayımbaşıoğlu

Guest

Can you pour concrete over plastic?

Yes, that's true if you use crappy concrete with too much water in it. The easy answer is don't use crappy concrete. ... Here's an idea—get rid of the sand and put the concrete right on the plastic sheet so that the bottom of the concrete mix does not dry out.

Ran Lupovich

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How do you put concrete under water?

Tremie Method of Underwater Concreting The concrete is moved to the hopper by either pumping, belt conveyer or skips. Tremie pipe, which upper end connected to a hopper and lower end continuously submerged in fresh concrete, is used to place concrete at the exact location from a hopper at the surface.

Ted Lyngmo

Guest

How do you keep wire mesh on concrete slab?

Dobies/Chairs: Small concrete blocks or plastic chairs are placed between the base & the wire mesh to hold the wire mesh in the center of the slab. Both come in an assortment of sizes and ensure the wire mesh remains in the center of the slab.

Bruce

Guest

How thick does a concrete slab need to be?

six (6) inchesIt is essential that you keep your concrete slab at no more than six (6) inches of thickness. Also, it would be best to work the numbers out if you wish to work with any lesser as you can only put in one slab.

StefanN

Guest

Will concrete cure under water?

Water Cure Concrete made with Portland cement will harden even if it is completely under water. In fact, one technique for curing a concrete slab is to build a soil dam around the perimeter of the slab, flood the slab with water and keep the slab covered with water for a week.

billynoah

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.

Felix Too

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

David Basarab

Guest

Can you add footers to a concrete slab?

edit - To put footings under the slab, you can cut holes wherever needed, excavate for footings (Sonotubes or concrete piers or similar) and then patch the concrete slab.

Bob Jarvis - Reinstate Monica

Guest

Can you cover wet concrete with plastic?

Another method to prevent discoloration is to place dry straw directly onto the concrete, then put the plastic on top of it. Wet the concrete, then place the plastic sheeting over it. ... Once a day, remove the plastic sheet and wet the concrete, then replace the cover. Do this for a week for the best results.

LaytonGB

Guest

Can you extend a concrete slab?

The easiest way to do this is to cover the extension with plastic. After approximately 48 hours, the wood forms may be removed. Then simply wait an extra couple of days and the slab will be strong enough to be subjected to stress, and you can enjoy a long-lasting extension to your patio.

Arkadiusz

Guest

Can you pour concrete on soft ground?

If you drive over a concrete slab that's got soft ground under it, the concrete wants to bend and stretch. ... If the concrete does develop a hairline crack, the crack should not open with the steel in place. Compacting the soil under the slab before the pour also prevents tension cracking.

Jon

Guest

Do you need to reinforce 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.

tokland

Guest

Do you need to put wire in a concrete driveway?

Wire mesh, like Rebar reduced the cracking and any uplift in the concrete driveway. Rebar will be used if there is a structural reason, meaning you need to carry the weight of the slab to pilings or plan to build above the slab. For a driveway, just use the wire, lap it one box around.

Warren P

Guest

How do you break concrete at home?

InstructionsCover the concrete slab with 4 mil plastic sheeting if you're working near windows.Dig under the concrete if you're able to do so.Start to break the concrete, starting six inches from the edge and working your way in. ... Pry with a long bar or wrecking bar as you go. ... Cut any mesh wire with bolt cutters.More items...•Oct 14, 2019

Leniel Maccaferri

Guest

Do you have to put cement board under tile?

In short, tile and grout are not inherently waterproof. ... Cement backer board is often used as a tile base on plywood or OSB subfloor. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. In most cases, you can apply tile directly to the concrete.

CherryDT

Guest

Do I need gravel under my concrete slab?

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..

Tim Peters

Guest

How do you remove concrete haze from stone?

InstructionsWet the Stones. Use a garden hose to fully saturate the stone. ... Dilute the Acid With Water. Put on safety goggles and long rubber gloves. ... Apply the Acid Solution. Brush the diluted acid solution onto the stone, using a stiff-bristled plastic brush. ... Scrub the Stones. ... Rinse the Stone.

Nino Filiu

Guest

Should you cover concrete with plastic in cold weather?

Plastic Sheeting Can Permanently Discolor Concrete.

Adverse weather conditions such as rain, snow, or freezing temperatures often make it necessary to protect concrete by covering it.

...

If the concrete is completely covered with plastic, no outside moisture can penetrate to contact the slab..