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 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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126 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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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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698 views

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 do I seal bendy mdf when making concrete formwork

I need to make some curved formwork for a concrete job, bendy mdf seems like an easy way to make the curves and my local B&Q stocks it. However I will need to reuse the formwork 6 times, so how ...
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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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How do I remove THIN layer of carpet glue from concrete?

The folks who owned this house before us were the cheapest people around. They glued carpet to our concrete floor with a very thin layer of glue. Now, I'm having a terrible time scraping it off. I ...
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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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382 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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How powerful of a hammer drill do I need to make holes in a concrete ceiling?

I want to mount a cornice for curtains on a concrete ceiling. So I believe I need some kind of hammer drill. I would like to know, how powerful should it be for this kind of work?
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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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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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142 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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2k views

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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How can I repair the cool deck around the pool?

In places around the pool the cool deck has flaked off and I can see the bare concrete. The previous owner tried to patch it in places but it looks horrible because the texture AND color don't match. ...
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393 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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2k views

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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897 views

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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481 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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4answers
2k views

Can I float a tongue-and-grooved 1x12 pine floor over a concrete slab on grade?

I have bare concrete floor that was, until recently, covered with carpet. After recently seeing a friend of mine purchase raw pine, shape the tongue-and-groove himself, and seal it to achieve a ...
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151 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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729 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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209 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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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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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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3k views

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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2k views

Should gloves be worn when working with concrete to prevent it from coming in contact with skin?

I was told recently that concrete is slightly corrosive. Should gloves be worn when using concrete or is it fine to handle concrete as long as its not done on a regular basis?
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314 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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199 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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153 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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How can I prepare uneven concrete basement floor for vinyl planks?

I have roughly 600 sq ft of basement that needs new flooring after some unfortunate flooding this past summer. We had carpet over concrete and are now looking to lay vinyl planks down. There is about ...
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Are there any advantages to using higher priced sealers?

I want to use a water based sealer on my pavers to bring out the color and also for some resistance against dirt and fading. I went to the store and saw sealers varying in price from about $11 per ...
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How to stop outside rainwater from coming in under the wall and through the concrete floor of my garage conversion?

I have got a problem with an attached garage converted den in a 1978 built brick home. The heavy spring rains are redirected to the two year old perforated drain system on the side of the house ...
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What do I level a 2" slope in my concrete basement floor?

I want to finish a 12'x36' part of my basement. The trouble I am having is that it is sloped to a floor drain. I was told that DRIcore and shims would work but the drain is a 2" slope down from the ...
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640 views

How do I create concrete or fiberglass outdoor seating that will last?

My husband and I have a design for outdoor seating we would like to create that is organic (curvy) in shape and surfaced in mosaic designs. Think of a dragon undulating in and out of the water, the ...
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503 views

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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385 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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318 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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456 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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587 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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563 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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637 views

Will this drill bit work on concrete?

I'm very new at drilling stuff and I have never drilled a hole in my life before. I need to drill through concrete (I don't know what kind of concrete it is), and I'm wondering if the following drill ...
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567 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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672 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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332 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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152 views

Concrete basement: Do I need a sealer or wax only?

I'm going to acid stain my concrete basement floor. Do I NEED a sealer, or can I simply apply wax directly to the concrete (which intuitively would act as the sealer itself)?
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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 ...