Concrete is composed of cement, aggregate (including crushed rock and sand) and water. In homes, it's frequently seen in the foundation, driveway, sidewalk, patio, and stone walls. Note that bricks use mortar in the joints, not concrete.

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How do I move a slab of concrete?

I want to build a fence in my backyard by my garbage stand is sitting on a concrete slab and that slab is in the way of where I want to put the fence so I want to move it over a few feet. The slab of ...
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105 views

Repairing animal damage in concrete driveway

My driveway has a few separate slabs (is this the right terminology?) and an animal has been digging in the gaps between two slabs. The gap is 1 - 1.5" wide. It looks like the rain is washing away the ...
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356 views

Building on top of 3/4'' plywood subfloor

I want to build this: http://www.mrmoneymustache.com/2012/12/21/how-to-make-a-relatively-sweet-shower-cheap/ and I'm building in my basement bathroom: on top of the foundation I have 2x4 (horizontal) ...
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149 views

Removing concrete lip at garage

I am interested in removing a garage concrete slip (31"Wx8'4"Lx1.5"H) to accommodate a storm shelter (4'x8'). The slab is post tension. The project entails a diamond blade set to cut at a height of ...
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92 views

Repairing exterior cement wall

I have an exterior wall on one side of a brick building that appears to be stucco or cement. Some of it is starting to come off in sheets. Basically, there is one layer, maybe the thickness of orange ...
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172 views

How do I prepare a hole for concrete?

I removed a chimney from my house earlier this year. After everything was cleaned up, I was left with this big hole: I have two questions: (1) How do I know what type of concrete to use? (2) How do ...
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Easy way to remove tile concrete from bathroom wall?

Are there an easy to to remove tile concrete from the wall? Are there e.g. some way to get it off in whole pieces so cleaning up afterwards will be easier? Here is a picture of the wall in question. ...
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How many concrete piers do I need to support a 10 x 10 wooden floor supporting a 1600 lb shed?

Aptos, CA, United States. As you've probably noticed from my prior post, I'm in the process of building a foundation for a garden shed. My specific county/region does not have strict ...
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Applying thinset to concrete floor

I am planning to install ceramic tiles with a "Warmup" heating element beneath them. My first step is to install 1/4" insulation boards on the concrete floor using non-modified thin-set. The floor ...
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176 views

What are the dimensions of the steel in the concrete slabs on the upper floors of my house?

Drilling holes (for curtains) in the ceiling of the 1st floor(2nd floor in the US) of my house I ran into a steel rod in the middle, running parallel to the outer wall. The steel is about 2.5cm in ...
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287 views

How can I fix my concrete front porch landing

My front porch is concrete, but it's too far below the front door, so there is a landing. The landing is also concrete. However, this landing is not long enough (in the travel direction, IE when ...
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Can I add cement glue and sand into my concrete mix to repair my cenent garden statue?

I have a leopard concrete garden statue that was given to me by my neighbor that has a broken foot and log. I want to repair it and paint it. It also has been weather eroded so I need to recover it as ...
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310 views

How do I form and pour long concrete steps for an exterior staircase?

I want to replace some concrete blocks with proper stairs in front of my house. They are wobbly and dangerous. Attached is a photo of what is currently there. I have been unable to find anything ...
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162 views

How should I waterproof a concrete roof?

We have a 28y/o Medical Clinic in a remote area of Haiti. The roof is concrete and has one coat of DryLoc on it which is lifting off in many areas. The roof is 136' X 35' with a very slight pitch to ...
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How can I prevent this concrete block wall from falling over?

I have a concrete wall that separates my backyard with my neighbor’s. It has been there for decades (at the very least 30 years). I have a slope of about 30 degrees and have noticed that the wall is ...
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1answer
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How can I paint/stain an interior concrete floor?

I have a very lovable aging bulldog who has peed on the wall-to-wall carpet enough that I'm ripping it out. It's over twenty years old anyway. The subfloor is a concrete slab. My goal is to make the ...
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510 views

How can I get the 2-part epoxy smell out of concrete?

Six months ago or more, my friend used a 2-part epoxy (no longer have the packaging, but it's a double-syringe with clear liquids, purchased at Home Hardware) on something, and some of it (one or both ...
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How long can I store a bag of Quikrete?

I had planned to find a nook in the low-humidity house in which to shove it, but it would be interesting to know how long the bag will keep in various humidities. The main question is: How long can I ...
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1answer
547 views

How do I dig out a hole for fence posts in a concrete patio?

I'm installing a short fence to run from the side of my house to the external garage. It will run along a seam where my asphalt driveway meets my concrete patio. I'm fairly certain that the footers ...
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170 views

How can I temporarily cover up a bathroom door to a shower room?

We are having a local swim meet and we need to temporarily cover the doors to the shower/bathroom on the pool deck to keep parents and others from coming on deck. The doorway is concrete block ...
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1k views

Should I pour a footing and pier at the same time?

I am pouring concrete for deck footings. I need an 18in diameter footing to carry the weight, and I will also use a 8 in diameter pier to bring it to an inch above ground. The footing must be 30 in ...
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250 views

How can I patch my slab around a rough-in pipe in a difficult to access location?

I've got a situation similar to this one (slab finishing/patching around roughed-in plumbing remodel), but in my situation the finishing job poses a couple extra problems: 1) The trench routes under ...
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501 views

How can I prevent cracking in concrete (or earthen) walls from the freeze/thaw cycle?

I'm interested in building a garden wall from either concrete or rammed earth, or a mixture of the two, but I'm concerned about Michigan winters and the havoc they wreak on everything solid. It seems ...
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253 views

Can a conical form for pouring shorter concrete footers be used for fence posts?

The frost line is 1.2m deep in my area. That seems like a lot of concrete to pour for a fence post. I'm wondering if a better way is to make a shorter footer following the suggestion that's used in ...
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How should I paint my basement floor?

I have an 80 year old basement concrete floor that recent had asbestos tiles and mastic removed. It is in good shape, with a few hairline cracks. I am planning on painting it. The basement is dry, ...
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How do I level a summerhouse concrete base that dips in the middle?

I laid a 4x3 metre concrete base for my summerhouse/office thing. The corners are all level and so the summerhouse sits fine, but it dips in between and so the load bearing battens aren't taking any ...
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Are there any advantages to using metal post spikes set in concrete when building a privacy fence?

My neighbor and I are considering alternatives to wood-in-concrete fence posts for a privacy fence that can have significant wind load in an area that gets up to -30 degree frosts in winter. The ...
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403 views

How deep should I drill a pilot hole in concrete for a 2 inch screw?

For fixing a 2 inch screw on concrete wall, how should I drill for good strength and no damage to the wall. I tried a 2 inch screw and drilled for 1 1/2 inch and later tried to screw it into the hole. ...
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175 views

How do I go about making 1“ and 2” thick “boards” for concrete furniture?

I have designed a cement feeder for hogs, for my hobby sized farm. It is generally based around a professional one we already had. I have planned on different parts of it being 2 inch, 1.5 inch, and ...
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218 views

How do I remove a small amount of water based concrete sealer from a painted floor?

I was using a water based concrete sealer on my painted concrete floors. I did something wrong, and one tiny section didn't dry clear. My question is, what can I use to remove a small portion ...
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166 views

How can I fix a tilted concrete shed footing?

We just bought our first home, and it came with a shed (hooray! Workspace!). The shed has a footing that's about 8" wide and runs the perimeter of shed, and at some point erosion has caused the part ...
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What is the best choice for patching and leveling concrete before tile install?

We have a small area of concrete foundation that we need to patch and level prior to ceramic tile installation (12×12 tiles). It is concrete that we chipped the old tile mortar off of, so there are ...
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What should I do about a horizontal crack around my porch slab?

This crack runs all the way around my porch slab but doesn't go into the foundation where the basement starts. The ranch house was built in 1956. The porch was framed in and our office is in there ...
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3answers
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How can I install T molding on concrete subflooring?

I'm at the point where I want to install some T molding for the transition from our main room to the bedrooms. I just took a look at the directions and they only show screwing the track into the ...
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What is the maintenance schedule for a concrete driveway?

I have a concrete driveway that I'd like to keep looking good, and in good working order. What needs to be done to maintain the driveway, and how often should it be done?
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Is creating a concrete driveway a diy?

The entry of the driveway is just a rock bed with no concrete. I want to replace it, it doesn't have to be replaced with concrete so I'm open to suggestions there. If it is a diy, what are the high ...
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Should I use self-leveling concrete or mortar to level a patched area of concrete prior to tiling it?

I had to repair cast iron pipe in the basement. This left me with a 2ft x 3ft hole in my tiled basement floor. We cut along the grout lines, so I just need to replace the tile and concrete. Well, ...
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408 views

How do I repair a concrete driveway that has been damaged by salt?

When we moved into our house the driveway was pitted due to salt use. We would like to repair this, but we are looking to know what the best method would be. Can a new layer of concrete be added over ...
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1answer
348 views

What's the best way to fill in some uneven cracks in my garage and level it out so that I can paint over it?

I have a big crack on my garage floor. I need to fill it and level it out so that I can paint over it using that garage floor epoxy paint. Basically, I'm selling the house and I want to make the ...
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1answer
519 views

How do I determine the correct rise of a step for a concrete footing on a slope?

Going to be building a retaining wall in the front yard on a slope. I'm going to be using King size residential bricks to make a 2 wythe wall. Because of the slope I'll need to have 3-4 steps in the ...
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711 views

What are these holes in my concrete wall and how can I mount things to them?

I have several 2.3" holes in my concrete walls. I think they were likely used as part of the construction or assembly process. They're maybe an inch to an inch and a half deep, and they look like ...
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What should I do about a crack in the concrete slab in my living room?

We purchased the house about 2 years ago. The house is about 50 years old. Today we removed the carpet and the hardwood floors under the carpet. We found out the slab has an approximately 10ft long ...
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664 views

What can I do about this painted concrete?

The previous owners of my home decided to paint the sidewalk and porch surfaces. Not only are they painted but they are this horrible color. Do you have any suggestions on what to repaint them with ...
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2answers
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What should I consider when cutting/making window in concrete foundation?

I am thinking about putting in another window for my basement apartment. I would like to know what do I need to consider before trying to find a contractor to do this. I have uploaded a picture of ...
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362 views

Will having a joint between concrete beams weaken a structure?

My house is currently being constructed. It is a 20x60 foot plot. The boundary walls on the left and right sides are 4 inches thick. The beam on the right side 4-inch wall has been constructed. Now ...
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1answer
516 views

How should I flatten (not level) a concrete subfloor?

In the final stages of finishing a room in our walk-out basement. This particular room has a long history, as it was originally a garage. Thus, it has a slight pitch from the back of the room ...
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4k views

How can I repair a slow leak in my concrete fountain?

I have a painted concrete fountain whose bottom well slowly leaks over about 2 days. My area gets to ~-20c (-9ish F) in the winter, so I worry that trapped water is slowly destroying it. I suspect ...
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769 views

How can I strip and repaint a concrete porch?

My porch is concrete and has been painted over several times, the last time by the previous owner using paint that is obviously not appropriate (it's very slick when it rains/snows). It needs to be ...
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4answers
657 views

Should a concrete slab slope toward my house?

I am adding a room to my home, the contractor poured a concrete slab for the addition and it slopes toward the existing house and it is now raining and water is coming under my floors. Is the slope of ...
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189 views

Can too little sand equal weaker concrete?

Often on a bag of cement the instructions will relate the quantities in terms of bags of cement with wheelbarrows of sand and stone. They claim that 2bags cement = 1 wheelbarrow. I found that my ...