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 can I tell if I've got Cool Deck installed?

I have coping around my pool that I thought was Cool Deck. When I started researching "How to repair cool deck", I noticed I do not have the uneven (up and down) pattern) my coping is smooth and ...
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478 views

How many bags of concrete do I need?

I would like to make a small concrete slab of the following dimensions. Length: 1.2m Width: 0.86m Depth: 0.09m The cubic volume as i understand it is all those numbers multiplied. result: 0.0929m2 ...
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What tools and techniques are required for moving & re-sloping a cement slab walkway?

My next "shape up" project for my house is moving and re-sloping the concrete slab walkway that goes around my house. I am wondering what tools would be handy for this job. I'll need to get a pry ...
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181 views

Can salt be used to create a slip resistance surface in concrete?

Is it true that salt can be used to put a slip resistant surface in fresh concrete?
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394 views

How can I mount a projector to a concrete ceiling?

I am in a dorm room and I am attempting to mount my projector and screen in my ceiling... As far as I can tell from just tapping the ceiling it is made of cinderblocks if that sounds right or ...
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651 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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140 views

Suggestions for dealing with the sharp corner of a storm drain

The (city-owned) storm drain outside my house has a corner that protrudes about half an inch from the line of the sidewalk. It's sharp enough to puncture a tire; I've lost a few to it over the years, ...
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3k views

How to fix a through hole in a concrete step?

Here're two photos of a through hole in a step in an enforced concrete staircase in an apartment building. The step is about one inch thick, the hole is about three inches wide and appeared many years ...
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681 views

How can I clean and paint my basement floor?

The basement in my house I just purchased has remnants of paint on one half of the basement that is separated by a wall. The remaining paint is stuck down really well and I would like to paint over ...
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Would wrapping a wood fence post in plastic help protect it?

I'm geting ready to install a couple new wooden privacy fence gates on the sides of our house. One of my co-workers suggested to wrap the 4"x4" with plastic stretch wrap around the 2' part that will ...
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How do I fill in around waste pipes?

Broke the concrete in my basement to run new pipes for the basement bathroom. The plumber put sand under the pipes to support them at the correct angle. I asked him not to glue the vertical sections ...
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How to level a section of raised concrete floor?

I had a plumber move a toilet drain on cement slab. The new concrete he poured is about 1/8" higher than the rest of the floor. I need the floor to be level for tile installation. The new concrete is ...
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770 views

How to repair botched, colored concrete?

We have a back patio with colored concrete that was poured last year. When the concrete was poured, it looked like the color was only picked up by the first half of the pour. The contractor poured the ...
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How can I color concrete?

I'm going to be using a mold to pour a concrete pathway and I was wondering about coloring options. I've done this previously with this quikrete product. It worked and turned out okay, but one bottle ...
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1answer
1k views

Do I need to install dry wall in my basement?

I have a concrete basement with concrete walls. I'm thinking about just painting the basement and not have to put up dry wall because I want to save money. Is that a good idea or should I really ...
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2answers
1k views

how to cut concrete beams/sleepers

I have long (60cm/23") concrete beams that I want to cut to size to build a small garden wall. They are 15cm/6" high. I know there exist heavy cutter tooling to cut through (concrete) tiles, but it ...
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3k views

What drainage should I install under concrete slab in garage?

I have a concrete garage which is halfway inside the hill. Essentially the surface behind the garage is at garage's roof level. Garage's floor is concrete slab 3"-4" thick (at least it's best I could ...
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195 views

Can I rescue leaning concrete forms?

I'm adding to my deck. I marked off 6 holes, and dug them about 30" deep. Then I set tubes in, letting them extend about 8" above ground. I put a couple inches of rock in the bottom. I made sure the ...
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Should a post in a circular concrete form go through the bottom?

I am replacing a fence post that was in a circular 2-ft form. The old one had rotted where the concrete and post meet at the top - the next one will have the concrete above water level! But - I ...
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446 views

How can I extend this concrete pad?

So the wedge shaped concrete pad thats right up against the house; April 17th, we're having air conditioning installed before it gets to hot out. According to the installer, the unit will fit on the ...
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2answers
466 views

How to install level wood header under sloping garage door opening

I am wood framing concrete garage door opening described with pictures in this question. Top concrete header is about 2" inches out of level across 9' opening length. I want to install 2x8 PT header ...
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1answer
5k views

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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399 views

How do I drywall over a partial cement wall?

I have 9' walls and the bottom foot or so is cement on one wall. What's the best method to drywall over this wall so no moisture seeps in? As you can see, there was moisture seeping in down at the ...
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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 to add on to a concrete patio?

I would like to add on to my existing concrete patio with more concrete. I will about double the size of the patio. My question is, should I have the new patio free floating from the existing or ...
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How can I hang a large but light poster on a concrete pillar?

I have a large (est. 5'x7') sheet of plastic foam with a poster printed on it. It weighs maybe 3 lb and is reasonably stiff. I'd like to hang it on a solid rectangular concrete pillar about 2' wide. ...
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553 views

What is involved in enlarging a concrete garage door opening?

I have a concrete garage with an opening measuring 99" wide by 85" high. There is 10" of concrete from the door opening to the left and right walls and about 1' above. All walls are 8" thick and ...
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942 views

How do I repair the bottom lip of a concrete slab?

(My issue is kind of like this question but more of a missing chunk than a thin crack.) I have a concrete patio in the front of my house that was fixed by a previous owner after a bottom chunk broke ...
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5answers
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How can I use toggle bolts with limited depth behind them?

I have a predicament, I am putting up a shelf into the wall. The wall is plaster, and then hollow and then concrete. I have screws with toggle bolts on them. The 2 inch screw with the toggle bolt ...
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334 views

How can I paint a concrete floor?

I have an ugly black concrete floor in the laundry and I would like to paint it white over the top. I have a few questions. What different steps do you take when you are painting over a color rather ...
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482 views

Patching a cracked concrete/brick walkway

A smallish part of the concrete/brick walkway leading up to my front door has broken off. The cracked piece is about six inches long by two inches wide. How do I go about repairing this? Is this ...
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266 views

Does concrete sealant slow the growth of moss?

Does sealant like Thompson's WaterSeal slow the growth of moss on concrete? I live in the rainy Pacific Northwest and moss and mold are regular problems.
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How can I repair deteriorating concrete walls?

Our garage is about 80 years old and made of steel-reinforced concrete. The inspector deemed it structurally sound, but cosmetically the interior is a mess. The concrete has come loose (it is old ...
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How do you secure wood framing to a concrete basement floor?

I'm using Pressure treated lumber for the bottom plate in a basement finishing project. What should I use to seperate the wood from the concrete? What are ways to secure the bottom plate to the ...
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Pouring a concrete slab against my house: how to frame it up against the outside wall?

I have a concrete front stoop that drains some water into the basement, so I am going to knock it out and pour a new slab with better grading. The slab will be about 4 feet square, and fits into a ...
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Driveway expansion joints are rotting wood: What to replace the wood?

My driveway was poured in sections with lengths of 2x4 which remained between the slabs as expansion joints. Due to heaving and moisture many of these are in poor shape. I replaced one once by ...
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How to Insulate a concrete slab foundation in an older house?

What are some ways to insulate a concrete slab type foundation in an older home built in the 50's? The slab as far as I can tell is not insulated at all and results in a very cold floor and living ...
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Where can I find unsanded epoxy grout? [closed]

I have a concrete counter that is a bit unusual in that the surface layer is just concrete dye. It looks awesome, very earthy mix of colors, but unfortunantly it cracks, pulls up a bit. I tried ...
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1k views

How to attach concrete to wood?

I'm planning a wooden table with concrete legs. I will use a U-shape or O-Shape for the legs. Should i use screws to attach the legs to the slab or is there a better way? I thought of placing a metal ...
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1answer
2k views

How to hang a baby cradle from a concrete ceiling?

I am considering buying a baby cradle that will hang from the ceiling. We have a concrete ceiling in the apartment and I am not sure that it will be possible to install it safely. It needs to be able ...
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How to finish room with protruding concrete ledge/foundation?

I am finishing a basement room and have a concrete ledge which is part of the foundation. It protrudes into the room about 2.5 inches and is about 6 inches high. This ledge is the result of a ...
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2k views

Why won't my plugs stay put in concrete wall? [duplicate]

Possible Duplicate: Why would plastic anchors pull out of the wall? I have drilled holes in my concrete wall (good hard concrete) with a regular 8 mm concrete drill. They all seem like good ...
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1answer
1k views

“Draining” concrete blocks?

We've recently had exterior waterproofing applied our house. In the process, we removed an old cold room that was underneath our porch. They walled up the entrance to the old cold room, and then ...
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1answer
2k views

How do I prepare an interior cement floor for painting?

I have an enclosed carport that serves as 4th bedroom/den in a 30 year old house. This room has long been used as storage, etc, and is in fairly bad shape. I'm rehabbing it to serve as a home office, ...
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2answers
2k views

Does 100 yr old concrete floor need replacing?

Our house was built in 1905 and the concrete floor is uneven and gets a lot of moisture at times. We replaced the gutters which helped a little. We'd like to finish the basement, maybe use stained ...
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2answers
4k views

How do I seal a large gap between slabs to avoid freeze/thaw heaving?

I have a very large slab patio on the back of my home in Southern MN that has pulled away from the house about 6-8" due to freeze/thaw heaving. The previous owners have filled the gap with river ...
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1answer
2k views

What are my options for resurfacing or repainting my old concrete steps?

My front steps are very old. The paint was chipping off so I used a chemical paint stripper to remove it. I also used a pressure washer to get the rest of it off. I would like to stain the steps ...
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3answers
12k views

How to mount hooks into concrete ceiling that must be able to support several times bodyweight?

I am on the top floor of a loft apartment that used to be a factory. I want to install several hooks or some other fixture into my concrete ceiling from which I can hang gymnastic rings, a punching ...
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6answers
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Do I really need to use primer when painting an unfinished concrete floor?

I'm turning a one car garage into an office and want to paint the floor. I bought some Behr concrete paint, and the guy at Home Depot insisted that I have to put down a layer of primer first. Do I ...
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1k views

How do I alter the shape of my existing concrete steps?

I have some concrete steps from my back door that I plan to cover with paver brick, so that they tie in aesthetically with my new paver patio. The existing steps are rectangular, but I want them to be ...