Best answer

Trim-A-Slab is made from a rubber-like material that flexes and holds itself into the gap between concrete slabs.

Answered by: devserkan Date created: Jun 27, 2022

What consistency should plaster of Paris?

Asked By: Vivek Maru Date created: Jun 13, 2022

Measure out the plaster of paris powder and put it into another container. Break up any lumps of powder with a spoon. Remember that the ratio should be 2 parts powder to 1 part water. If you measured out 1 cup of water in Step 1, then you would need 2 cups plaster of paris powder.

Answered By: Someone Special Date created: Jun 15, 2022

How deep should I dig for a concrete slab?

Asked By: herm Date created: Jun 18, 2022

Add 2 inches to the depth for gravel if the soil is normally moist or has a high concentration of clay. Most concrete slabs will sit 1 to 2 inches higher than the dirt and 2 to 3 inches below the surface of the dirt, making the needed depth of the hole 3 to 5 inches.

Answered By: krassowski Date created: Jun 20, 2022

Can I put plywood over concrete floor?

Asked By: VBasic2008 Date created: Jun 24, 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: lhunath Date created: Jun 26, 2022

How thick should a concrete slab be for a shed?

Asked By: Pedro M Duarte Date created: Jun 09, 2022

Recommended Thickness of Concrete Slabs Shed Slabs: 3 1/2 inches thick. Shed floors that are being used for studio sheds or workshops will use a 3 1/2" thickness. Driveways: 4 inches, some areas require 5 inches. Many garage sheds need a driveway approaching the large shed door.

Answered By: pupeno Date created: Jun 09, 2022

What do you put between concrete and House?

Asked By: zcoop98 Date created: Jun 22, 2022

Water can get into the joints, freeze and then expand, making the cracks even larger. Gaps against a house can direct water against the foundation, leading to more problems. Once a year, go around your home and fill these gaps and joints with urethane caulk (or polyurethane caulk) to prevent problems.

Answered By: Inigo Date created: Jun 22, 2022

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

Asked By: Steve Date created: Jun 21, 2022

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.

Answered By: Darth Egregious Date created: Jun 22, 2022

What is the difference between cast in place concrete and precast concrete?

Asked By: jellycsc Date created: Jun 25, 2022

Cast-in-place concrete is a technology of construction of buildings where walls and slabs of the buildings are cast at the site in the formwork. This differs from precast concrete technology where slabs are cast elsewhere and then brought to the construction site and assembled.

Answered By: Filip Spiridonov Date created: Jun 26, 2022

Can you put concrete floors in a house?

Asked By: Landeeyo Date created: Jun 08, 2022

Plain concrete slabs have served as the flooring material for basements, garages, patios, and utility areas for many years, but concrete is now also a viable material in home interiors, where it can be polished, etched, or stained to serve as the finished flooring surface.

Answered By: shamittomar Date created: Jun 08, 2022

What can I do with old concrete slabs?

Asked By: crayxt Date created: Jun 08, 2022

Uses of Old Concrete Big chunks of old concrete may be placed on walkways to increase porosity of the surface. Concrete roads may be pulverized on site through rubblization and used as a base before applying asphalt. This kind of material has been found to be suitable for aquatic habitat in reefs.

Answered By: chickens Date created: Jun 11, 2022

What PSI should concrete slab be?

Asked By: stivlo Date created: Jun 15, 2022

A strength of 4,000 psi (pounds per square inch) after a one month cure is the industry minimum for concrete driveways, slabs and sidewalks. However, 4,500 psi as the ideal. According to guidelines published by, a home foundation requires a thicker pour of 8-10 inches and a psi of 3,500-4,000.

Answered By: Frerich Raabe Date created: Jun 18, 2022

Related Question Answers

Senthil Kumaran


Can I put cement over cement?

Yes, you may pour a concrete pad overlay over an existing slab. You need to consider the added height and weight of the overlay on the existing structure. Overlays may include polymers, portland cement concrete, or epoxies. You should improve the drainage of the slab by having a good slope on the overlay.

Harsh Bhikadia


Can you glue stone veneer to cement board?

What can I put stone veneer on for an interior application? For interior applications, stone veneer can be installed over cement board, drywall, and all of the above.



Can you put cement in silicone molds?

I started using epoxy resin about a year ago with silicone molds so using cement is a lot cheaper. For what I paid for resin I could get more than quadruple the amount of material out of cement. So if you're cheap like me, but like to experiment cement is a really good option.

Roman Pekar


Can you put concrete sealer over acrylic paint?

Yes, this can happen.

You should apply two coats of sealer and let it dry thoroughly in-between each layer.

Sealing also provides an easier surface to apply subsequent paint layers starting with a primer.

Sealing is important to acrylic painters to remove any chance of Support Induced Discolouration..



Can you put solid hardwood flooring on concrete slab?

With dry concrete and the right subfloors and vapor retarders, solid hardwood floors can be installed on slabs that are either on-grade (at ground level) or above-grade (above ground level). ... Wood floors should not be subjected to very wet conditions.

Willem Van Onsem


Do I need to seal concrete before epoxy?

New slabs of concrete should be allowed to fully cure for 30-60 days before a coating is applied.

If a sealer was previously used on the concrete (if water beads up on the surface), do not use epoxy.


Any cracks or concrete spall should be filled and stabilized before a new epoxy coating is applied..



How can I make my concrete countertops lighter?

First of all, the easiest way to reduce the weight of your concrete slabs is simply to make them smaller. There are 3 ways to do this: – Make more slabs. If you used 4 slabs to create a 16 foot long kitchen countertop, each slab would be only 4 feet long and therefore weigh a lot less than a single 16 foot long slab.

Kamil Kiełczewski


What is concrete without reinforcement called?

Mud slabs. Mud slabs, also known as rat slabs, are thinner than the more common suspended or ground-bearing slabs (usually 50 to 150 mm), and usually contain no reinforcement.

pallav bohara


Can I put drywall over plaster ceiling?

Hanging drywall over old plaster is very common. If the existing strapping is securely fastened to the ceiling, you should be able to hang sheetrock. I use 3/8" rock all the time over plaster walls and ceilings. The weight is not an issue.

Buhake Sindi


How much does it cost to get a slab of concrete poured?

Concrete slabs typically cost about $6 per square foot, or between $4 and $8 per square foot including labor. That's about $5,400, or between $3,600 and $7,200 for a typical 30- by 30-foot slab that's 6 inches deep. Materials alone cost about $4 per cubic foot.

Ryan Bigg


What happens if you pour concrete over grass?

You can pour concrete over grass, and depending on the thickness of the slab you may not have a problem. However, because the location may be unevenly compacted you can be assured that cracks will occur. Generally footings and slabs should be laid on undisturbed soil where compaction is solid and regular.

Nicol Bolas


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.

Arup Rakshit


Should I put Thinset under cement board?

Embed the cement board in latex-modified thin-set mortar The main reason for using thin-set between the cement board and the subfloor isn't as much for bonding as it is for even, void-free cement board support throughout the floor. ... Then spread thinset mortar with the flat side of a 1/4-in.



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.

Kim Kern


How do you keep weeds from growing between concrete slabs?

If your weeds are coming up through cracks in your concrete driveway or the seams between the slabs, you can prevent future weeds by sealing the cracks. Cement crack filler is inexpensive and easy to find at hardware stores and home improvement centers.

Black Mamba


What happens if you pour concrete without rebar?

Without rebar reinforcement, concrete is highly prone to cracks due to tension forces. Rebar helps prevent cracks from growing wider largely by preventing cracked slabs from moving apart. ... If you don't put rebars in a 4-inch [10 CM] slab, then it won't be reinforced concrete - and won't perform.

M. Deinum


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.

Ken Benoit


Should I caulk my concrete expansion joints?

Caulking Concrete Cracks and Expansion Joints Caulking the joints and cracks is the best way to stop this from happening. Even expansion joints in your concrete driveway should be caulked. They can be the biggest culprit of water under your slabs.



What is the difference between concrete detail and commentary?

A concrete detail is something that happened in the book. ... Commentary means your opinion, interpretation, insight, analysis, personal response, feelings, evaluation, explication, and/or reflection about a concrete detail you put in your essay. Commentary is NEVER found in the book.



What type of cement is used for footings?

Typically, reinforced concrete ranging between 3,500 to 4,000 psi is used on footing and slabs on grade; between 3,500 to 5,000 psi on suspended slabs, beams and girders; and walls and columns normally require between 3,000 to 5,000 psi. When non-reinforced concrete is used different strengths will be required.



What type of concrete is used for slabs?

reinforced concreteTypically, reinforced concrete ranging between 3,500 to 4,000 psi is used on footing and slabs on grade; between 3,500 to 5,000 psi on suspended slabs, beams and girders; and walls and columns normally require between 3,000 to 5,000 psi.

When non-reinforced concrete is used different strengths will be required..

Pranav Singh


When can I remove formwork from concrete slab?

For concrete slabs, formwork can usually be removed after 3 days and props after 2 weeks. For beam soffits, formwork should remain in place for 7 days and props for 2 to 3 weeks.

Sam Harwell


Can I put concrete in dry?

Pouring dry concrete is used by some to dry-fill holes and fence posts in the ground allowing the ground moisture to seep in and harden the concrete, however water is still recommended. You should not dry pour concrete on any project that needs a solid foundation.



Can I put concrete over asphalt?

You can put concrete over asphalt, and it is a great choice as a driveway base for residential homes. Asphalt is only suitable as a driveway base if it is at least between 2” and 4” thick for residences. ... Before you can pour concrete over asphalt, you must first soak the asphalt with water.

Think Twice Code Once


Do I need expansion joints in a concrete slab?

All concrete will shrink slightly as it dries and, when it's set, will expand or contract depending on the ambient temperature. To prevent cracks from forming, concrete expansion joints should be incorporated to allow for movement, particularly in slabs with a surface area exceeding 6m2.



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).



Can I put cement between pavers?

Mortar or Concrete Mix A 4- to 6-inch-thick concrete slab is suitable as a base for pavers, which can be laid directly onto the wet concrete so they are held in place when it dries.


Mortar also can be used in the joints between pavers, just like grout is used between tiles..

Klaus Byskov Pedersen


Can you put concrete between pavers?

Mortar or Concrete Mix A 4- to 6-inch-thick concrete slab is suitable as a base for pavers, which can be laid directly onto the wet concrete so they are held in place when it dries. ... Mortar also can be used in the joints between pavers, just like grout is used between tiles.



What do you put in cement to make it stronger?

You can add more Portland cement to bagged concrete to make it stronger. You can also add hydrated lime. To make the strongest concrete, the sand should be sourced from volcanic lava that has a high silica content.

Simon Tewsi


Should I cover newly poured concrete if it rains?

If the concrete is still fresh (around 2-4 hours after pouring), it's important to cover the surface to protect it. However, once the concrete has been finished (between 4-8 hours after pouring), and has set hard enough for walking on, the effects of rain should be minimal.

Merthan Erdem


How thick should concrete base be for oil tank?

Where concrete slabs are used, they should be at least 42mm* (recommended 50mm) thick.

The base should extend at least 300mm beyond the widest points of the oil tank and fully support the base of the oil tank in its entirety..

Hiren Patel


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.

Pavel Minaev


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.



Should I put a sealer on my new concrete driveway?

Experts recommend using a penetrating sealer outdoors because it sinks down into the concrete and has a more natural, matte finish. It is very important that sealers used on exterior concrete allow both air and moisture to pass through. A driveway sealer should be applied after the freshly poured concrete has cured.

AhmetB - Google


Should I put oil on concrete forms?

Concrete form release agent, or form release for short, is a product that's applied to concrete molds, frames and forms to prevent the concrete from sticking as it cures. Don't forget to apply form release oil to your concrete forms before pouring, even if you cannot find it on the market.



Should I put sealer on my concrete driveway?

And concrete driveways should be sealed every four or five years to protect them from water penetration and to prolong their life. Many people believe that concrete driveways don't need maintenance, so they may never apply a sealer. ... The first step in driveway maintenance is the repair of cracks and holes.

Jon Cage


Should I put water on concrete after it is poured?

Spraying water on your new concrete is one of the best and oldest ways to cure your concrete.

After new concrete is poured and finished the concrete begins its curing process.


Spraying water on the surface prevents the surface of the concrete slab from drying faster than the bottom..



Should I put wire mesh in concrete slab?

Wire mesh makes concrete more durable and increases its strength. The area in which the concrete will be laid down should be covered in mesh before pouring commences.



Should I seal concrete before epoxy?

Before an epoxy coating is applied to the floor, Jon-Don highly recommends considering the following: New slabs of concrete should be allowed to fully cure for 30-60 days before a coating is applied. If a sealer was previously used on the concrete (if water beads up on the surface), do not use epoxy.



How long should I keep concrete covered?

three daysA: The longer concrete stays damp after it's poured, the stronger it will be. Cover it with plastic or damp cardboard for a minimum of three days. A week is even better. For large slabs there is even some benefit at 28 days.

Jason Baker


How much does a 24x30 concrete slab cost?

On average, the material alone costs anywhere between $5.38 to $6.19 per square foot. How do you calculate concrete for a slab?...How much does a 24x30 concrete slab cost?Concrete Slabs CostsZip CodeBasicBestConcrete Slabs – Total Average Cost per square foot$6.88$14.612 more rows•Apr 16, 2020

Colin T Bowers


What is a floating concrete slab?

Floating slabs are concrete slabs that are laying over the ground, without any kind of anchoring, as if it simply sits on it and floats. Floating slab, as the name tells it resembles a plate that is simply laid over water, with no kind of connection between them.

Luc E


What is the importance of these expansion joints in concrete or steel roads?

An expansion joint is designed to absorb safely the expansion and contraction of several construction materials, absorb vibrations, and permit soil movements due to earthquakes or ground settlement. The expansion joints are normally located between sections of bridges, paving slabs, railway tracks, and piping systems.

Nathan Smith


What do you put between concrete and wood?

In most cases, either pressure-treated lumber or naturally durable lumber (defined by the IRC as the heartwood of redwood, cedar, black locust, and black walnut) is acceptable. In some cases, separating wood from concrete with a water-impervious membrane or vapor retarder is all that's required.



How do you fill large gaps between concrete slabs?

Dig a 4-inch wide trench along the sides of the slabs from the crack or gap closest to the house all the way down to the street or sidewalk. This trench should be a deep as the slabs are thick. Fill the trenches on either side of the driveway with small, rounded pea gravel (the size of marbles or peas).