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.

Answered by: Make42 Date created: Jun 25, 2022

## How do I calculate how much concrete I need for a slab?

Asked By: Riwen Date created: Jun 13, 2022

CONCRETE CALCULATOR FORMULADetermine how thick you want the concrete.Measure the length and width that you'd like to cover.Multiply the length by the width to determine square footage.Convert the thickness from inches to feet.Multiply the thickness in feet by the square footage to determine cubic feet.More items...•

Answered By: fpiette Date created: Jun 15, 2022

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

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: azizbekian Date created: Jun 20, 2022

## What do you use to insulate a concrete floor?

Asked By: udondan Date created: Jun 18, 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: jldupont Date created: Jun 18, 2022

## Do I need to prime concrete floor before tiling?

Asked By: RRUZ Date created: Jun 17, 2022

As a general rule, we would say use a primer of some description to prepare your floor prior to tiling. ... For instance, an old concrete floor that was tiled previously will probably not need a primer, as long as the surface is clean and free from old adhesive and anything else that was stuck to the floor.

Answered By: CommonSenseCode Date created: Jun 19, 2022

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

Asked By: ForEveR Date created: Jun 08, 2022

As I recall, a 60# bag of concrete is about . 5cf, so you'd need 3 bags per hole.

Answered By: philfreo Date created: Jun 09, 2022

## How much sand and cement do I need for brickwork?

Asked By: Halsien Date created: Jun 20, 2022

1:6 ratio of mortar for brickwork which means cement:sand = 1 part of cement and 6 parts of sand.

Answered By: Mickael Maison Date created: Jun 20, 2022

## How do you insulate a cement floor?

Asked By: Dan Lenski Date created: Jun 13, 2022

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.

Answered By: orome Date created: Jun 14, 2022

## How much cement do I need for a brick wall?

Asked By: squareskittles Date created: Jun 24, 2022

Quantity of cement, Sand or Mortar Required for Brickwork: 1:6 ratio of cement mortar is usually used for brickwork.

Answered By: Chris Schaller Date created: Jun 24, 2022

## How much cement do I need for 1m3 concrete?

Asked By: Daniel Danielecki Date created: Jun 13, 2022

Typically, 1m3 of concrete is made up of 350Kg of cement, 700Kg of sand, 1,200Kg of chippings and 150 Litres of water..

Answered By: It_is_Chris Date created: Jun 15, 2022

## How many bags of concrete do I need for a 8x8 slab?

Asked By: Philippe Leybaert Date created: Jun 24, 2022

How many concrete bags would I need for a 8 ft x 8 ft x 6" slab? 54 x 80lb Concrete bags. How much does it cost to pour a 8'x8' x6" slab? Ready-mix costs approx \$277.86.

Answered By: Michael Freidgeim Date created: Jun 24, 2022

Professor

### How much concrete do I need for a metal fence post?

Each hole for the terminal posts must be 8 inches in diameter and 30 inches deep, requiring 0.85 cubic feet of concrete to fill.

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.

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.

Professor

### 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

Professor

### How do I prepare my concrete for epoxy coating?

Prepping Your Concrete Floor Before you apply any coating, you need a clean, dry floor without debris, moisture, cracks or holes. Give the area a thorough sweep. Clean up any grease stains with a degreaser and a stiff brush. You don't need to remove all of the discoloration, just the greasy residue.

Professional

### Do concrete block walls need insulation?

Depending on whether the concrete block walls will be covered or if the top of the wall is exposed can really change the way they are insulated. The option for insulating concrete block walls include spray foam insulation, injection foam insulation, polystyrene beads, foam boards, and mineral loose-fill.

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.

Professional

### Do I need to insulate a concrete floor?

For solid concrete floors, make sure that if they need to be replaced, your builder puts in insulation – you have to insulate a floor when it is replaced in order to comply with building regulations. Solid floors are insulated using rigid insulation foam, which can be fitted either above or below the concrete.

Professional

### 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.

Professional

### 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.

User

### Do poured concrete walls need insulation?

Do Concrete Walls Need to Be Insulated? Some contractors add foam insulation in the concrete form before pouring the cement while others add rigid board-type insulation on the exterior of the concrete after it hardens. However your basement walls are constructed, you'll likely want to insulate them.

User

### 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.

User

### How do you insulate a concrete floor?

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.

User

### How much concrete do I need for 2 post lift?

12,000 pound two-post lifts (and higher capacity): Six (6) inches of concrete at 3000 PSI is required.

User

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

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.

Guest

### How much crushed concrete do I need?

Beside above, how much crushed concrete do I need calculator? In the construction world, most materials are measured in cubic yards. Multiply the length (L), in feet, by the width (W), in feet, by the height (H), in feet, and divide by 27. This will tell you how many cubic yards of crushed stone you need.

Guest

### Do you put cement board under bathtub?

You don't need any cement board under the tub. It is far more important to have a sturdy layer of ply under the tub.

Guest

### How many bags of concrete do I need for a 5x5 pad?

How many concrete bags would I need for a 5 ft x 5 ft x 6" slab? 20.8 x 80lb Concrete bags.

Guest

### Do I need to seal a concrete floor before tiling?

7. Apply the Sealer. After cleaning, patching, and repairing the concrete floor, you'll be ready to seal it. This process creates a protective layer that prevents moisture from seeping through the concrete and into the tile floor.

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..

Guest

### Should I put cement board under tub?

You don't need any cement board under the tub. It is far more important to have a sturdy layer of ply under the tub.

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.

Guest

### How much concrete do I need for 10 sonotube?

For example, a sono tube with a 10" diameter and a 4' depth requires 0.08 cubic yards of concrete.

Guest

### How much concrete do I need for a 4 foot sonotube?

For example, a sono tube with a 10" diameter and a 4' depth requires 0.08 cubic yards of concrete..

Guest

### How much concrete do I need for a flagpole?

The depth of the hole should be 1/3-1/4 the post height above ground (i.e., a 6-foot tall would require a hole depth of at least 2 feet).

Guest

### How much concrete do I need for an inground pool?

Plan on at least 5 minutes per cubic yard, for unloading time. How much concrete do I need? Order this much concrete, for these standard pool sizes. 12 x 24 – 5 yards, 14 x 28 – 6 yards, 16 x 32 – 7 yards, 18 x 36 – 8 yards and a 20 x 40 – 9 yards.

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.

Guest

### How much plaster do I need for a room?

Once you know how big the room is and ideally know how many square meters are in it, you can simply divide that figure by 9 to give you about how many bags of multi finish plaster you will need. Multi finish covers 10m2, but I say 9m2 to all allow for wastage.

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.

Guest

### Do concrete walls need insulation?

Homes that have concrete walls in the basement or elsewhere still need insulation and weatherproofing for the owners to enjoy increased energy savings. However your basement walls are constructed, you'll likely want to insulate them. ...

Guest

### How much concrete do I need for 1m3?

Various instructions and regulations therefore also state that you need about 56 packs of dry concrete of 40kg each for 1m³, which results in about 17.86 litres of liquid concrete per pack.

Guest

### Do I need to waterproof concrete floor before tiling?

Cement is actually a very porous material and can easily absorb water. Therefore, any concrete that may come into regular contact with water, such as under tile or for a pool, will need to be waterproofed. If cement is not waterproofed, it can cause issues with the mortar used between the tiles.

Guest

### How do you prepare a concrete floor for VCT tile?

Scrape down as much as possible (preferably all the ridges). Then give it a skim coat with ardex feather finish or equivalent to make everything nice & smooth. Might need to scrape/sand that & do another coat. Vct is a resilient floor.

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.

Guest

### How much concrete do I need for a post hole?

To calculate how much concrete you need, you need to know the post size you are going to use and how many posts you are installing. Your post diameter and height determine how big each hole needs to be. As stated above, fence post holes should be 3 times the diameter of your post and 1⁄3 as deep as your post.

Guest

### How much concrete do I need for fence posts?

To calculate how much concrete you need, you need to know the post size you are going to use and how many posts you are installing. Your post diameter and height determine how big each hole needs to be. As stated above, fence post holes should be 3 times the diameter of your post and 1⁄3 as deep as your post.

Guest

### Do I need cement board under floor tile?

If you're working over a wood subfloor, cement board is the right choice for your tile base. ... Because plywood expands and contracts beneath the ceramic tile, grout and tile failure (loose tiles and cracked, crumbling grout) is just a matter of time.

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..

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.

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.

Guest

### How much cement mix do I need?

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Use the following yields per each bag size: 40 pound bag yields .011 cubic yards. 60 pound bag yields .017 cubic yards.

Guest

### How much concrete do I need for a 20x20 pad?

Concrete Slab Prices By SizeSlab SizeSquare FeetAverage Cost Installed15x15225\$1,38820x20400\$2,46824x24576\$3,55420x30600\$3,7026 more rows

Guest

### How much concrete sealer do I need?

Apply the Sealant Depending on how porous your concrete is, a gallon of sealer will cover 250 to 500 square feet.

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.

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.

Guest

### Can you put vinyl flooring on concrete floor?

Vinyl planks are an easy floor covering for a concrete subfloor. ... Vinyl plank flooring with a robust backing has some insulation value but not much, so if you want the cold concrete to feel comfortable, you may have to install a thermal underlayment or even build a raised plywood subfloor.

Guest

### How much concrete do I need for a 10 sonotube?

For example, a sono tube with a 10" diameter and a 4' depth requires 0.08 cubic yards of concrete.

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.

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.

Guest

### How do I figure out how many yards of concrete I need for a slab?

How do I calculate how much concrete I need for a slab?Measure the area in feet.Multiply length by width, and then by thickness.Divide the resulting number by 27 to find cubic yards.