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 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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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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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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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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1answer
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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1answer
443 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
450 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
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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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2answers
387 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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483 views

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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1answer
531 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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2answers
895 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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1answer
329 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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1answer
463 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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1answer
258 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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4answers
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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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2answers
11k views

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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3answers
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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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2answers
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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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0answers
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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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2answers
970 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
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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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3answers
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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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2answers
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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
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“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
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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
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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
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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
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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
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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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1answer
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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 ...
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4answers
861 views

Is it possible to patch concrete stairs?

At my church, there is an old set of stairs made of concrete. They've begun to crumble on the top to the point where the treads are no longer flat and smooth. I've not seen any material that has ...
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1answer
351 views

How can I thicken Acid Stain myself?

I have been doing a lot of decorative concrete around my house, and I have yet to find a masking tape or caulking or anything that can hold the acid stain where I want it. I finally found something ...
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1answer
140 views

How do I fix my crawlspace's mould problem given the floor is an improperly poured slab of concrete?

I have a 50 year old backsplit, with a minor mould problem in the crawlspace. There are a couple of wet spots that can be fixed with simple exterior grade changes, and one spot that will need to be ...
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What kind of paint should be used on an outdoor concrete walkway?

I have an outdoor walkway that was freshly painted just before I bought my house two years ago. Two winters have worn down the paint and now it needs another coat or the exposed concrete will crumble. ...
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1answer
422 views

Would building a partial raised wall for a pond in this way be strong enough?

I just read your answers about "Building a raised wall for a pond." Although quite detailed, I am not very physics minded and hope someone will give me a thumbs up or down. I have a pond that is ...
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Should I seal, waterproof a concrete basement floor before painting?

What is the best sealer/waterproofer to put on a basement floor that I just want to paint. New construction, no water problems, but washer & drier & water heater are in basement and add to ...
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1answer
399 views

Do I need to do more prep work on this cement floor before putting in new tile?

In my basement i have a poured concrete floor, and we're re-doing the bathroom down there. It used to have Vinyl flooring, and we ripped it all up. The top vinyl part came up easily, but it left a bit ...
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4answers
497 views

Would upgrading my basement with sandstone blocks be worthwhile?

Having a look at an old farmhouse that is for sale in the area, and as with most houses in the area of this age the foundation is built on red sandstone blocks, around five feet deep, with a dirt ...
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1answer
494 views

How can I hang a framed picture onto a wallpapered concrete wall without damaging the wall surface?

I have a framed picture about two feet by three feet in size that weighs about one pound (not a sheet of paper). I want to hang it onto a wall that is of full-blown hard concrete and covered with ...
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How do I handle a transition from concrete to dirt underneath a flagstone patio?

I had a pool installed a few years ago and the builder threw in a narrow concrete patio around it. See fuzzy picture below (sorry about that. Google earth must be a little tipsy tonight). So now ...
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What is the best way to fill a hole in a concrete basement floor?

My basement floor has a hole cut where the water line enters the house. This hole is around 2ft square, and digging down a little I hit dirt and small roots. I'd like to seal this hole as I believe it ...
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1answer
322 views

Where can I buy a concrete gate post in the style of this 1930’s gate post?

We are about to get a wall rebuilt and it would be great if we could have gate posts that where in the same style as the rest of the road. As I don't know the same of the style I have nothing to ...
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1answer
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How do I properly renovate the concrete floor of my balcony?

I live in an apartment that can be characterized as an old soviet-era, 5-story, multi-apartment, concrete block-based building. That means, everything was built by "stroybat" a soviet-time army ...