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 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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127 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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192 views

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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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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298 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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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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343 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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298 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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376 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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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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378 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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1k views

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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280 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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349 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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2k 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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470 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
465 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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159 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 ...
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How to remove construction adhesive from concrete?

We removed a wooden dance floor that was glued to concrete with liquid nails. How do I remove the liquid nails that is all over the concrete floor? Has anyone had success with heat, mineral spirits ...
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What is the difference between building sand and plaster sand

Recently I mixed a batch of mortar for building and was unsure if the hardware provided me with building sand or plaster sand.. What are the properties that differentiate the two? and are there any ...
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Why do builders say that wet concrete/mortar is not as strong?

I have been watching a few videos demonstrating the mixing of mortar and cement and a constant theme is that you must not have the mix too runny. I cannot fathom the reason... Does anyone care to ...
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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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Will I trap moisture in the concrete of basement walls and floors if I seal them with epoxy?

I'm thinking about painting my basement's walls with some concrete sealer (before finishing the basement) and floor with epoxy paint. Many people are doing that, but I'm concerned about moisture in ...
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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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Will I cause problem/cracks with jumping exercise in upper floor?

Every day I am doing my martial art practice in upper floor. It contains jumping and power movements which cause sounds downstairs. Is there any problem for concrete by this continuous jerking ...
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73 views

How do I install a range anti-tip kit into hardwood floor on concrete?

I'm preparing to install an anti-tip kit for an electric range. It's a piece of shaped metal designed to be bolted to the floor with two screws or bolts. The floor is hardwood (probably engineered) ...
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8k views

How do I replace a wooden fence post that was set in concrete?

I need to replace a wooden fence post that was set into concrete. The post has snapped through rot at the base and the rot has set in so far that the post snapped about 2 inches beneath the surface. ...
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702 views

Can I change the color of the mortar in my brick wall?

We recently built our home and the mortar color between the bricks is dark gray, we did not pay attention to it and because of that the brick face is looking duller due to the standard gray mortar. ...
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How do I repair cracks in the concrete pillars supporting my patio roof?

I have two round concrete pillars that support my patio roof. I have noticed that they have cracks even though they are new. I suspect the filling of mortar and bricks inside those pillars was not ...
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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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What water:cement:sand ratio gives the strongest mortar?

A typical mortar mix ratio is 1 cement : 3 sand. But what is the water ratio? Is it 0.5:1:3? Would a 0.5:1:2 ratio be a stronger mortar? Our next door neighbor has a dog that digs like a pro. The ...
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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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Can I install hardwood floors (not floating) on a concrete floor?

We have recently bought an old house, and the ground floor has a hard floor and is currently covered in tongue and groove laminate - which we hate. We'd like to put reclaimed floorboards down - is ...
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What can I do about this gap between my driveway and the street?

I have a low car and the ditch between my driveway and the street is pretty big. I usually enter my car in reverse at a very steep angle as to not have it scrape the lower front. My neighbors park ...
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510 views

What are “concretors' nippers” for?

I came across this tool called "concretors' nippers" I guess they are for some operations with concrete reinforcement, but can't find any details. What operations is this tool for specifically? ...
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406 views

Does RedGard count as a rubber sealer in a shower?

In standard poured shower pan construction there is normally a rubber layer between the bottom flat layer, and the upper sloped layer. Today I came across the following "updated" method: (credit: ...
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How do I build a form and pour a concrete pad?

I have a new safe that I want to put out in the garage. I'd like for it to be in a specific corner, but that corner has a few quirks. First, the slab is pretensioned. No cutting, drilling, coring, ...
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150 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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732 views

How long does radiant heat in a concrete floor last?

I am looking to purchase a home built in 1950 that has radiant heat with copper pipes inside the concrete slab foundation. The home has been vacant for a little while now too, not sure if that ...
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2k views

How can I prepare this concrete floor for tile?

I'm looking to replace an old carpet in my finished basement with tile. I've removed the carpet and found a surface with some peeling paint, which I've read needs to be removed since the thinset for ...
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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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575 views

What is this burnt cement floor treatment called?

In Brazil we have a floor finish named Burnt Cement (that doesn't involve burning). Here is a description of the process In summary, you use a mix of cement and pigment (sometimes marble powder too) ...
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Can a cheap angle grinder be used to cut concrete and ceramic tiles?

I am interested in the Black & Decker KG100 600W Angle Grinder because it is cheap enough. I will only use it occasionally for small scale do-it-yourself home improvement works. But, I really ...
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2answers
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Is it wise to cut a long trench in concrete slab foundation?

I've got a two-car garage (4-inch concrete slab on grade) that I'm turning into living space. I want to put a bathroom out there but I need to get plumbing through the floor. I didn't think it was ...
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3answers
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How do I prepare this exterior concrete wall for paint?

I have a an exterior concrete wall that had some loose paint and started scraping away. The paint in some sections was so loose that I went all the way to the bare concrete, peeling away over 6 layers ...
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Why are my concrete water tanks not retaining water?

I have concrete water tanks, where I grow ornamental fish. Recently on draining the tanks to clean, I observed that they do not retain the water. The tanks drain over time, ...
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What type of wall construction is shown in these pictures?

These photos were taken through a small hole in the wall of a house. They are of the inside of the cavity. The hole they were taken through is at a height of about 60cm from the internal ground floor ...