Best answer

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.

Answered by: Quang Hoang Date created: Jun 26, 2022

Do you need stone under a concrete slab?

Asked By: ProblemsOfSumit Date created: Jun 09, 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: juanpa.arrivillaga Date created: Jun 10, 2022

What do you use to insulate a concrete floor?

Asked By: peterm Date created: Jun 22, 2022

Solid floors are insulated using rigid insulation foam, which can be fitted either above or below the concrete. If the concrete is above the insulation it can sometimes store heat during the day, which helps keep the room warm at night.

Answered By: Shafik Yaghmour Date created: Jun 24, 2022

What is the best concrete cleaner?

Asked By: Saurabh Mistry Date created: Jun 10, 2022

What is The Best Concrete Cleaner?Best Overall: Black Diamond Stoneworks 32 oz. ... Best Budget: WD-40 128 oz. ... Best Outdoor: Scotts 32 oz. ... Best Garage Floor: Miracle Sealants 1 gal. ... Best Degreaser: Oil Eater 1 gal. ... Best Concrete Cleaning Solution: Sheiner's 1 gal. ... Best For Pressure Washer: Simple Green 1 gal.More items...•

Answered By: tzaman Date created: Jun 13, 2022

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

Asked By: ospider Date created: Jun 08, 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: stdcall Date created: Jun 08, 2022

What is the best concrete mix ratio?

Asked By: harryg Date created: Jun 16, 2022

A concrete mix of 1 part cement : 2 parts sand : 4 parts coarse aggregate should be used for a concrete slab. Concrete must be placed within half an hour of mixing.

Answered By: Prestaul Date created: Jun 19, 2022

What is the best insulation for concrete walls?

Asked By: Jon Date created: Jun 08, 2022

The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete. Any of the following insulation materials are acceptable for this purpose: closed-cell spray polyurethane foam or either XPS, EPS, or polyisocyanurate rigid foam.

Answered By: Tim Schmelter Date created: Jun 08, 2022

What is the best concrete mix for a patio?

Asked By: M.Innat Date created: Jun 07, 2022

A Strong Start: The Best Concrete Mix for Every DIY ProjectBEST FOR TRADITIONAL CONCRETE SURFACES: Quikrete Concrete Mix. ... BEST FOR PROJECTS REQUIRING EXTRA STRENGTH: Quikrete 5000 Concrete Mix. ... BEST FOR SETTING POSTS: Quikrete Fast-Setting Concrete Mix. ... BEST FOR BUILDING CONCRETE COUNTERTOPS: Quikrete Countertop Mix.More items...

Answered By: doğukan Date created: Jun 07, 2022

Can concrete cure under water?

Asked By: klutt Date created: Jun 16, 2022

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..

Answered By: ducin Date created: Jun 17, 2022

Can I pour a concrete slab yourself?

Asked By: Cuong Le Ngoc Date created: Jun 11, 2022

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. After the concrete has hardened, the sides of the form are knocked off and the slab is ready to use.

Answered By: Jesper Date created: Jun 12, 2022

Can plaster walls be insulated?

Asked By: bartonjs Date created: Jun 20, 2022

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.

Answered By: piRSquared Date created: Jun 22, 2022

Related Question Answers

DevWL

Professor

Can you insulate a concrete floor?

Insulation below a concrete floor Generally, if possible, insulating concrete below the concrete floor is the best form of installation. This is because the concrete helps to absorb the heat much better, whilst also preventing the room from overheating.

Himanshu Sharma

Professor

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...

wBob

Professor

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.

Burhan Khalid

Professor

Does concrete need insulation?

While concrete provides a high degree of strength and durability, it offers very little natural insulation for the home. Adding insulation to your concrete walls improves your home's energy efficiency, which often results in a more comfortable home for your family.

Delan Azabani

Professor

What is the best concrete glue?

The Best Concrete Bonding Agents for Your ProjectBest Polyurethane. Loctite PL Premium Polyurethane Construction Adhesive. ... Best Overall. Quikrete 1 Gal. ... Best Bang For the Buck. Quikrete 1 Qt. ... Best For Cold Temperatures. SikaLatex 1 Gal. ... Best For Concrete Blocks. ... Best Polyurethane. ... Best Overall. ... Best Bang For the Buck.More items...

kennebec

Professional

What type of hardwood flooring is best for concrete slab?

engineered wood floorA floating floor is the perfect companion for a concrete subfloor. According to flooring experts, the best kind of wood flooring to use with a concrete subfloor is a floating engineered wood floor. This kind of floor performs well, resists moisture and is easy to install.

Piglet

Professional

What type of insulation goes under concrete slab?

Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene (EPS) and extruded polystyrene (XPS). Although both are closed cell insulations, they perform very differently over the long term.

aminography

Professional

What is the best concrete caulk?

Take a look at the top products below to get an idea of what the best exterior caulk for you might look like.BEST OVERALL: DAP Dynaflex 230 Sealant.BEST FOR CONCRETE: Sashco Slab Concrete Crack Repair Sealant.BEST FOR WINDOWS AND DOORS: GE Sealants & Adhesives Window & Door Sealant.More items...

cuixiping

Professional

Can water go under concrete slab?

Weakened water lines. Since water lines are laid down under the concrete slab, there can be minor damage such as small nicks when the concrete is poured. Although these occurrences may not cause immediate leaks, they can weaken the pipes and grow into a leak-causing crack later.

Aaron Beall

Professional

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.

Sdaz MacSkibbons

User

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..

Clément Prévost

User

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.

Jason Swett

User

Which cement brand is best for slab?

Best cement for slab:- The best cement for slab used in construction is OPC- 53 (Ordinary Portland cement grade 53) and PPC (Portland pozzolana cement) brand of UltraTech Cement, ACC Cement, Ambuja Cement, Sagar cement, Dalmia Cement, Shri cement, Birla cement, etc. These cement brands offer & good deals.

recursive

User

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.

Meno Hochschild

User

Which concrete is best for slab?

Best Cement for Slab ConstructionOrdinary Portland Cement (OPC Cement)Portland Pozzolana Cement (PPC Cement)Oct 17, 2020

Patrick

Guest

What happens when you pour concrete over grass?

You should not pour concrete over the grass directly. For your concrete to harden flat and smooth, it is best to clear all vegetation and pour the concrete on top of smooth and debris-free soil. Leaving grass under your concrete slab can cause some unnecessary issues for you in the future.

Jaswant Singh

Guest

What is the best flooring to put over a concrete slab?

laminateLike 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.

Dinesh Balasubramanian

Guest

What is the best way to break up a concrete slab?

Tool #1: Sledgehammer + Pry Bar When thinking about breaking up concrete, most of our minds jump straight to jackhammer. But you can probably do the work with a metal sledgehammer and a little elbow grease. Sledgehammer is the best tool to use if the slab of concrete is three inches thick or less.

v-andrew

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.

lonesomeday

Guest

What is a good shoe for standing on concrete all day?

Top 15 Best Shoes for Walking / Standing on Concrete All Day Reviews in 2020Best Overall: Timberland PRO Men's Powertrain Industrial & Construction Shoe.Best Value: Skechers Men's Glides Calculous Slip-On Loafer.Best for Running On Concrete: Under Armour Men's Charged Assert 8 Running Shoe.More items...•

Everett

Guest

Can concrete cure underwater?

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.

krassowski

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.

jonhobbs

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.

ggorlen

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).

Matteo Italia

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

Anthony Forloney

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..

Harshal Patil

Guest

Should I insulate plaster walls?

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.

Some programmer dude

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.

Mikko Ohtamaa

Guest

Should you put plastic under concrete slab?

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.

Camilo Martin

Guest

What is the best base for a 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.

Sinan Ünür

Guest

What is the best base for concrete slab?

The base course material, according to ACI 302, "Concrete Floor and Slab Construction," should be "compactible, easy to trim, granular fill that will remain stable and support construction traffic." ACI 302 recommends material with 10 to 30% fines (passing the No. 100 sieve) with no clay, silt, or organic materials.

klin

Guest

What is the best concrete floor insulation?

Another option for insulating your concrete floor are some more flexible materials such as Knauf rock wool insulation slabs or Rockwool insulation slabs, which also offer a level of sound insulation, apart from known as being great and versatile insulators.

Ashwin Nanjappa

Guest

What is the best concrete for a slab?

High-strength concrete mixes offer exceptional durability and long-lasting performance. Be sure to choose a high-strength concrete mix like Sakrete 5000 Plus High Strength Concrete Mix, or Sakrete Concrete Countertop mix for your concrete countertop project to ensure it will remain strong and durable over time.

gboffi

Guest

What is the best concrete mix for sidewalk?

QUIKRETE®QUIKRETE® Concrete Mix is a good general-purpose mix for sidewalk and slab work. T-square, measuring tape, mason's line, pickax, rake tample, hammer or half-hatchet, darby or bull float, hand float, finishing trowel, bricklayer's trowel, edger.

Jorge Ferreira

Guest

What is the best concrete to use?

A Strong Start: The Best Concrete Mix for Every DIY ProjectBEST FOR TRADITIONAL CONCRETE SURFACES: Quikrete Concrete Mix. ... BEST FOR PROJECTS REQUIRING EXTRA STRENGTH: Quikrete 5000 Concrete Mix. ... BEST FOR SETTING POSTS: Quikrete Fast-Setting Concrete Mix. ... BEST FOR BUILDING CONCRETE COUNTERTOPS: Quikrete Countertop Mix.More items...

Paulo Schau Guerra

Guest

What is the best insulation for concrete floors?

There are two ways to handle insulating concrete floors. You can attach wood sleepers to the floor, fill the gaps with rigid-foam insulation, and then apply your finish flooring. Or, as demonstrated here, you can cover the slab with rigid-foam insulation, add two layers of plywood, and then add the finish flooring.18 Nov 2019

Maxim

Guest

What is the purpose of plastic sheeting under a concrete slab?

The sand layer cannot dry downwards by vapor diffusion because of the plastic sheet—it is a vapor barrier after all. In fact that's why we have it under the slab. We want a vapor barrier under the slab. ** We want to prevent water vapor from coming up from the ground into the concrete slab.

Jared Smith

Guest

How thick should concrete floor insulation be?

Designers generally insulate both directly under the slab and around the perimeter as well. In cold climates it is advisable to use a minimum of 2 inches of extruded polystyrene under the slab. Many increase the under-slab insulating foam board thickness to 3 or 4 inches at the outer 2 to 4 feet of the slab.

WouterD

Guest

What are old plaster ceilings made of?

Lath and Plaster The plaster was made from lime mixed with sand, bulked up with horse hair for strength, usually applied in two or three layers to an increasingly fine finish. To check what type of ceiling you have, take a look from above, under the loft insulation, or lift a bedroom floorboard.

vitaly-t

Guest

What are the best shoes to wear when walking on concrete all day?

Top 15 Best Shoes for Walking / Standing on Concrete All Day Reviews in 2020Best Overall: Timberland PRO Men's Powertrain Industrial & Construction Shoe.Best Value: Skechers Men's Glides Calculous Slip-On Loafer.Best for Running On Concrete: Under Armour Men's Charged Assert 8 Running Shoe.More items...•

Richard

Guest

What do you put on concrete floor?

Best Flooring for Concrete Slab FoundationEngineered Wood. Natural hardwood flooring offers undeniable beauty and durability. ... Vinyl. As a longstanding choice for kitchens and bathrooms, vinyl has a reputation for extreme water resistance. ... Laminate. ... Carpet. ... Tile.

Andrew Mao

Guest

Will concrete cure in 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.

jay.sf

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:

Joe Phillips

Guest

Why the concrete block is used under slab base?

Block walls can also be used to form stem walls that support a slab above. When building stem walls, block courses on footings are set below grade and reinforced with rebar before concrete is poured in a continuous pour for a seamless, integral slab.

Guru Stron

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.

Alex K.

Guest

What kind of insulation should I use under concrete floor?

Phenolic foam is a popular choice to get around this issue, as it's able to achieve strong levels of insulation for less depth. If this is the situation you find yourself in, the DPM will sit above the concrete and your moisture resistant chipboard will go on top, beneath the flooring surface.

jgauffin

Guest

Why do you put plastic under a concrete slab?

In fact, most professional shed slab builders will install a polyethylene membrane under a shed concrete slab even if it is not specified. The reason is that the vapour barrier stops moisture from the wet concrete escaping into the ground under the concrete.

Eric Leschinski

Guest

Should you put plastic under concrete driveway?

It is still a good idea to have protection against rising damp even though you don't strictly need it. In fact, most professional shed slab builders will install a polyethylene membrane under a shed concrete slab even if it is not specified.