Best answer

It is rolled out between the actual laminate flooring planks and the subfloor.

Very often, particularly in a below-grade installation on a concrete basement floor, a vapor barrier is recommended in addition to the underlayment.

That vapor barrier would go between the subfloor and the underlayment..

Answered by: harrrrrrry Date created: Jun 26, 2022

Do I need to seal cement board before tiling?

Asked By: LarsTech Date created: Jun 11, 2022

Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. ... However, if you choose to use concrete backerboard, which is much stronger and more durable than gypsum board, a water vapor membrane must be placed underneath it or a sealant applied on top of it.

Answered By: noblerare Date created: Jun 13, 2022

Do I need a vapor barrier behind cement board in shower?

Asked By: kimbaudi Date created: Jun 14, 2022

Moisture barriers stop that water or vapor from getting any farther and potentially rotting your studs, the drywall or greenboard installed behind the enclosure. They are required beneath your shower pan and behind your shower walls.

Answered By: zeytin Date created: Jun 17, 2022

Do you need stone under a concrete slab?

Asked By: frankenapps Date created: Jun 11, 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: jgauffin Date created: Jun 13, 2022

Can I put plywood over concrete floor?

Asked By: Ben Jackson Date created: Jun 11, 2022

Plywood-on-slab. Place a 6-mil polyethylene vapor retarder directly over the concrete. Lay 3/4-inch plywood sheets opposite to the direction of the finish flooring, leaving a 1/4-inch gap between panels to eliminate squeaking. Fasten the plywood to the concrete using powder-actuated fasteners or concrete nails.

Answered By: zcoop98 Date created: Jun 14, 2022

Does sealing concrete stop moisture?

Asked By: Nawaz Date created: Jun 18, 2022

What are Concrete Floor Sealants Used For? Floor sealants are a very effective moisture mitigation solution. They're used to seal the concrete subfloor and create an impermeable barrier between the subfloor and your flooring.

Answered By: Nick Grealy Date created: Jun 18, 2022

Is concrete block waterproof?

Asked By: Brendan Abel Date created: Jun 23, 2022

Waterproofing Concrete Block Foundations. Concrete blocks and cinder blocks are much more permeable to water and water vapor than poured concrete. ... Block foundation walls will provide only a weak barrier against capillary water seepage and water vapor.

Answered By: Betamos Date created: Jun 26, 2022

Do I need to waterproof cement board in shower?

Asked By: Charchit Kapoor Date created: Jun 16, 2022

Here's what the TCNA handbook has to say about the matter: “A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials.” ~B412 Bathtub or shower with prefabricated receptor. Cement board or Fiber-cement board.

Answered By: Sobrique Date created: Jun 16, 2022

Do I need to seal my concrete floor before tiling?

Asked By: basarat Date created: Jun 15, 2022

Although you don't need to install an underlayment between the concrete and the tile, you need to prepare the surface before placing the tile. After all, cracks and uneven areas in the concrete can cause damage to the tile above, and uncontrolled moisture in the concrete can destroy the mortar and loosen the tiles.

Answered By: Kiv Date created: Jun 17, 2022

How do you waterproof a flat concrete roof?

Asked By: Sachin Joseph Date created: Jun 17, 2022

Step 1 - Clean Your Roof. In order to successfully seal your roof, you first need to start with a clean surface. ... Step 2 - Carry Out Minor Repairs. ... Step 3 - Use Seam Tape. ... Step 4 - Coat With Primer. ... Step 5 - Spray on a Vapor Barrier.

Answered By: T.J. Crowder Date created: Jun 20, 2022

Do you need to seal a concrete floor before laying laminate?

Asked By: Maxim Shoustin Date created: Jun 10, 2022

You don't need to seal a concrete floor before installing laminate; however, to prevent moisture from the concrete floor from affecting your laminate, install a vapor barrier of polyethylene film. Install this barrier even if the concrete subfloor is covered by vinyl, linoleum, terrazzo or ceramic tile.

Answered By: Andrew Shepherd Date created: Jun 11, 2022

Related Question Answers

Matt Huggins

Professor

What do you put on concrete floor before laminate?

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.

riQQ

Professor

What is the best flooring to put on a concrete floor?

Like other flooring materials that work well over concrete slabs, laminate uses layers to fight moisture. This makes it a reliable option to install over your concrete slab. If you plan to transform your basement into a high traffic area for entertaining and relaxing, laminate could be a great option.

DeborahK

Professor

Do you need plastic behind cement board?

Their online instructions/diagrams show no use of a vapor barrier. You should, so that any moisture that gets behind the cement board runs into the tub or shower instead of into your wall cavity (causing rot or mold/mildew).

Bianca Balan

Professor

Do you need a vapor barrier behind cement board?

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

Paulw11

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.

Andrew Jaffe

Professional

Can I pour concrete around cast iron pipe?

You could just add a couple inches of sand, enough to handle the vapor barrier and then cover the pipe with a couple layers of plastic or roofing material and place the concrete right over the pipe.

akhil_mittal

Professional

Can I use Mop and Glo on concrete floors?

Waxing Products and Concrete Flooring Not all types of concrete flooring will benefit from this treatment, but high gloss polished flooring and some types of stained concrete flooring will. ... Do not use cheap wax-cleanser combination products, such as Mop-n-Glo and other products available at your local grocery store.

Bhavya Parikh

Professional

Can I use self leveling concrete as my floor?

Once dry, a self-leveling overlay can be covered with a traditional flooring material, like carpet, tile, hardwood or laminate; or it can be sealed, and left exposed, to use as a wear surface, because its cement composition gives it a hardness and durability meeting or exceeding that of normal concrete.

Joshua Taylor

Professional

Can I use white cement as grout?

To create a grouting mix, all you need is water and white-cement powder. Use a sheet of old ply or laminate (as seen here) for making the mixture. Two additional pieces of laminate will be required to mix the grout.

Frodnar

Professional

Can self leveling concrete be used as a finished floor?

Once dry, a self-leveling overlay can be covered with a traditional flooring material, like carpet, tile, hardwood or laminate; or it can be sealed, and left exposed, to use as a wear surface, because its cement composition gives it a hardness and durability meeting or exceeding that of normal concrete.

Teifion

User

How do I know if my concrete floor is level?

Measure any gap that appears between the floor and the level. If the gap measures less than 1/8 inch, you can consider that area level for flooring installation. Larger gaps require pouring a self-leveling mortar in the depression to level the flooring surface. Mark these depressions with a felt-tipped marker.

Trevis

User

How do I prepare a concrete floor for laminate?

To get the most out of your laminate flooring, it needs to be dry, level and clean.

To ensure your floor from letting in moisture, you must let the concrete cure for 30 days.

It needs an excessive amount of time to fend off moisture..

Bithastian

User

How do I remove plaster dust from laminate flooring?

Take care to mist the acetone on the floor and then remove it immediately and completely. Another approach is to sweep, then vacuum (no beater brush) and use a dry Swiffer® duster to make sure all debris is gone. Buff with acetone, then mop with water and vinegar or lemon juice.

Johnny Oshika

User

How do you attach plywood to concrete floor?

Plywood-on-slab. Place a 6-mil polyethylene vapor retarder directly over the concrete. Lay 3/4-inch plywood sheets opposite to the direction of the finish flooring, leaving a 1/4-inch gap between panels to eliminate squeaking. Fasten the plywood to the concrete using powder-actuated fasteners or concrete nails.

Alireza Ahmadi

User

How do you cover a concrete floor?

Laminate. One low-cost option to covering concrete floors is laminate flooring. Laminate comes in a variety of designs and colors. The laminate material can mimic the look of wood, tile or natural stone flooring.

nickf

Guest

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...

Tim Henigan

Guest

Can you use rejuvenate on concrete floors?

Bring your floors back to life with the Rejuvenate Floor Renewer System. It was designed to fill in scratches, restore shine and protect the surface. Use it on a wide variety of flooring, such as hardwood, laminate, vinyl, concrete, slate, linoleum and more.

Frank Farmer

Guest

Do I need a vapor barrier between concrete and wood flooring?

Despite a successful moisture check and the presence of an underground moisture barrier, you still need additional protection from water vapor before laying a wood floor. Sheets of 6-mil thick polyethylene plastic, overlapped with seams taped, is one means of providing that moisture barrier.

Zharlinat

Guest

Do I need underlay on concrete floor?

Concrete bases need an underlay with a moisture barrier, a damp proof membrane (DPM) or a separate barrier to protect the floor from damp. If the sub-floor is wooden the choice of underlay will depend on what is being laid on top.

johnharris85

Guest

Do plaster walls need insulation?

If your historic house has original plaster walls, you should not blow insulation into the exterior walls. Old houses with plaster walls have no vapor barrier under the plaster to stop moist air from saturating the insulation. Instead, plaster walls are designed to allow the free exchange of air and moisture.

Eran Galperin

Guest

Do plaster walls smell?

plaster is not a vapor barrier, so any odors in the walls can get in. it's good for the longevity of the plaster since it can breathe (if it gets wet, it can dry, for instance), but it won't keep the odors out.

Henk Holterman

Guest

How can I cover a concrete floor cheaply?

Cheap Basement Flooring IdeasEpoxy and Concrete Paint. Paint is generally your cheapest basement floor option. ... Concrete Stain and Sealer. Concrete stain is another inexpensive option. ... Linoleum or Vinyl. ... Ceramic Tile Flooring. ... Rubber and Foam Mats. ... Traditional Carpet Flooring. ... Laminate or Engineered Hardwood.

PerformanceDBA

Guest

How concrete flooring is done?

Anatomy of a Concrete Floor This layer is covered with a vapor barrier sheet that prevents moisture from moving up into the concrete. A welded wire fabric mesh sheet is then placed over that in order to aid with adhesion. Finally, the concrete slab is poured directly onto these layers.

Linda Paiste

Guest

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..

bkucera

Guest

Should you seal concrete before laying laminate?

You don't need to seal a concrete floor before installing laminate; however, to prevent moisture from the concrete floor from affecting your laminate, install a vapor barrier of polyethylene film. Install this barrier even if the concrete subfloor is covered by vinyl, linoleum, terrazzo or ceramic tile.

Chris K

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.

Miguel Moura

Guest

What are concrete release agents?

Barrier release agents prevent adhesion by the development of a physical film or barrier between the forming surface and the concrete. Reactive release agents are chemically active and work by the process of a chemical reaction between the release agent and the free limes available in fresh concrete.

Tin Nguyen

Guest

Is concrete flooring cheaper than laminate?

Because so many factors go into the cost, the pricing can range from $2 per square foot to over $30 per square foot for professional installation. In most cases, you should not install a concrete floor yourself. ... To install laminate flooring, you should expect to pay between $3 and $5 per square foot.

o15a3d4l11s2

Guest

How do I stop moisture in my concrete floor?

Methods Used to Stop Moisture in Concrete FloorsLow-permeance Vapor Barrier or Retarder.

A Low-permeance vapor Barrier or retarder can effectively keep below-slab moisture from reaching the flooring system.

...

Allow Natural Drying of Concrete Slab.

...

Keep Excavation Free of Water..

Mahdi Bashirpour

Guest

Do you need underlay on concrete floors?

Most sub-floors will be either wood or concrete. Concrete bases need an underlay with a moisture barrier, a damp proof membrane (DPM) or a separate barrier to protect the floor from damp. If the sub-floor is wooden the choice of underlay will depend on what is being laid on top.

FatalError

Guest

Is a vapor barrier necessary behind cement board?

Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall. ... You should NOT place a vapor barrier BEHIND the backer board.

IntelliJ Amiya

Guest

Does cement board in shower need waterproofing?

“A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials.” ~B412 Bathtub or shower with prefabricated receptor. Cement board or Fiber-cement board. Ceramic Tile. ... Consult local building code for moisture barrier requirements.”

Sinan Ünür

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..

Gilbert Le Blanc

Guest

Do I need plywood under cement board?

Because cement board can be used either for floors or walls, the surface below the cement board will vary: Flooring: For ceramic tile floors, the cement board usually rests on a plywood subfloor (minimum 5/8-inch-thick exterior-grade plywood or OSB).

Cameron

Guest

Should you put a vapor barrier behind cement board?

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

inspectorG4dget

Guest

What is the purpose of a vapor barrier under concrete slab?

The use of a vapor barrier (more accurately termed a vapor retarder), having a water vapor permeance of less than 0.3 perm is frequently used to retard the flow of moisture through the slab. These vapor retarders are typically polyethylene or polyolefin sheeting materials.

ssc-hrep3

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.

Wais Kamal

Guest

How do you insulate lath and plaster walls?

Treat Your Gutted Walls Like New Construction When you have gutted your walls, install fiberglass batting, foam insulation or dense-pack cellulose insulation from the inside. Place a 4-mil plastic sheeting vapor barrier over all three of these types of insulations.

peak

Guest

Is concrete a Vapour barrier?

Actually, no. Air barriers need to be continuous and free from holes, but vapor barriers do not need to be. Lots of vapor moves by air movement, not a heck of a lot of vapor moves by vapor diffusion. The concrete slab is the air barrier, and the ripped and torn and punctured polyethylene sheet is the vapor barrier.

Athanasios Kataras

Guest

How do you fill white cement between tiles?

Grouting is done 24 hours after you have affixed the tiles in a pattern on the cement bed. 2a to 2d. To create a grouting mix, all you need is water and white-cement powder. Use a sheet of old ply or laminate (as seen here) for making the mixture.

Dean Elliott

Guest

What can I cover concrete walls with?

Any gaps or cracks in your concrete floor and walls need to be sealed with cement. Special concrete coatings or a polyethylene membrane can also be applied as a barrier.

Đĵ ΝιΓΞΗΛψΚ

Guest

Do you need a vapor barrier under concrete driveway?

The application of vapor barrier in exterior concrete is unnecessary due to the fact that water penetration does not matter. Any slab on grade that is enclosed and on the interior of a building should have a vapor barrier installed prior to pouring concrete, especially if flooring will be applied.

SuperNova

Guest

Do you put plastic under concrete slab?

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).

Reaz Murshed

Guest

Do you need to seal cement tiles?

Like natural stones, cement tiles are porous and therefore need to be sealed to avoid staining. Penetrating sealers coat the cement particles in the tile making it less likely they will retain stains. Topical sealers create a barrier on the surface of the tile so that stains do not reach the cement.

Nilani Algiriyage

Guest

How much cement and sand do I need for floor tiles?

Mortar calculation for tile flooring We need 1.5 m3 volume of wet cement mortar that means, we need this much volume after adding water to cement and sand mix. Dry volume of mortar is considered as 25% of more of wet volume.

GSto

Guest

How do I stop condensation in my concrete shed?

9 ways to effectively reduce garage condensationControl your garage's temperature. ... Use a vapor barrier. ... Dry your wet vehicle off after parking it in the garage. ... Check your ventilation. ... Inspect your drainage. ... Apply a floor coating. ... Install a dehumidifier. ... Get rid of that old garage fridge or freezer.More items...

GhostCat

Guest

Can I pour concrete against pressure treated wood?

Yes, but you should also have a insulating barrier between the concrete and the wood. Pressure treatment is generally to kill bugs and reduce fungi but it will still absorb moisture through the concrete if it is there. By insulating between them, the chances of moisture transferal is greatly reduced.

Ondra Žižka

Guest

Is concrete slab waterproof?

Concrete slabs are not impervious to water. In fact, given the right environmental conditions, the floor slab can transmit gallons of water into the living space as vapor, and in extreme cases, actually show ponding water. ... The pre-construction solution is to use an underslab vapor barrier.

croxx5f

Guest

Is it cheaper to do stained concrete or tile?

Tile Floor. According to Concrete Network, the average ceramic tile flooring costs between $11-$22 per sqft, and natural stone can coast as much as $20-$50 per sqft. New installation of stained and polished concrete can cost between $2-$15 per square foot.