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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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
5k views

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
212 views

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
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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3answers
6k views

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
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
5k 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
16k views

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
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 ...
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4answers
896 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
371 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
146 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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2answers
5k views

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. ...
3
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1answer
444 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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2answers
3k views

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
409 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
513 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
560 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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2answers
911 views

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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3answers
8k views

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
328 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
2k views

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 ...
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2answers
681 views

How to repair cracks in concrete overhang over entrance

I have a slab of concrete over the front entrance of my house with some serious cracks in it. I don't actually know what the proper name for it is, which makes this difficult to Google - so I've ...
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2answers
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How can I clean a very dirty concrete basement floor?

My basement floor has been made amazingly gross (thank you, cats) and I'd like to get it really clean. Is there an option other than scrubbing on hands and knees? Are there cleaning solutions that ...
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1answer
243 views

How should I prepare an all-concrete warehouse space before building out?

I haven't put together my complete buildout plan yet, but I expect that most of the preparatory steps are the same regardless of where I'm going with it. The space is approx 100'x100'x16', and ...
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4answers
743 views

How can I attach normal framed walls in between concrete columns?

I'd like to add partitions to this grid of columns. I want to make "normal" walls, framed with 2x4 and faced with plywood or drywall. My concern is how to attach the walls to the columns. Naively, I ...
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1answer
1k views

Drilling holes in concrete

I'm not what you'd call a handy guy, and now wife wants me to put up curtains. This task is reduced primarily to getting a bit of metal stuck to the ceiling. I bought screws and anchors. The anchors ...
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3answers
4k views

Small Concrete Paver patio under BBQ

I have a BBQ that's currently sitting on a not so level grassy area. I'd like to create a very small base for the grill with two 2ft by 2ft concrete pavers so I have a level base, but I don't know how ...
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4answers
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Water coming in through the walls of an old concrete garage

I recent bought a house with a detached garage, made of old concrete (high aggregate content) reinforced with steel rods and set into a hill. Built in 1938 or so; no waterproofing. Now that Boston ...
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2answers
278 views

How to find the concrete beam in a sandy block ceiling?

I want to hang a ceiling fan at my apartment, where the ceiling is made mostly of a sandy material. How do I find the concrete beam going through it, assuming I do not have access to the blueprints of ...
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1answer
552 views

Is it ok to use pneumatic tools underwater

I have a concrete that is stuck underwater. The concrete piece is too heavy. I think that I could break it into small pieces with my pneumatic impact drill.
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1answer
728 views

Is it OK to pave without mixing?

Going upon the advice of a reputable builder, I used Quikrete fast-drying concrete for a small slab outside my house. Not load bearing. His recommendation was to dry-pour the whole thing. Framed, ...
3
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1answer
219 views

Heat causing concrete to heave

I mostly hear about this happening for roads on very hot days, but I'm wondering what about the heat causes the concrete to heave? Is there any concerns for foundations/garage floors/drive way heaving ...
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1answer
1k views

methods of detecting a copper pipe in concrete floor

We believe that our copper water line is embedded in the concrete (and rebar) basement floor. We would like to excavate a hole to install a sump pump. We don't want to hit the copper line which we ...
2
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1answer
361 views

How to mitigate and/or repair concrete frets (slab edge wetting)

A building engineer made a report of problems with our property. One issue raised was "slab edge wetting" by which the building engineer meant that the concrete slab on which the house is built is ...
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1answer
394 views

How to build up concrete slurry under a new bath

I'm replacing our bath. It is a standard built-in plastic bathtub, with a concrete slurry built up underneath it. I talked to a builder some time ago who explained that it was to support the weight of ...
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2answers
5k views

What are my refinishing options for a concrete patio?

I have an external concrete patio, about 3 years old. I'm wondering if there are any finishing or refinishing options to make it look a little better than just boring 'ole concrete.
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2answers
3k views

Extending concrete Slab

I have a 10 x 10 slab (4 inches thick) that is already in my back yard in the corner. I bought a kit to build a 10 x 10 shed on it, and then realized that would put it right up to my fence. So my ...
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2answers
662 views

Repair Hole in Concrete Foundation

The previous owner of my house had a sprinkler system installed and had it run off the main water supply in the house instead of a separate meter. I had a new meter installed, so I do not have to pay ...
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1answer
414 views

How hard is stamping concrete?

I want to put a 2' border around my driveway of colored and stamped concrete. I have gotten bids that almost $3,000. I have called the concrete company and asked how much 5 yards of colored concrete ...
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2answers
2k views

Building a raised wall for a pond

We are looking to build a small pond (9'x18'x6'), but we want the edge to be raised up about 8". I am thinking about using CMUs (Concrete Masonry Units) which are 8x8x16. The entire pond will be lined ...
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3answers
2k views

Removing blacktop/asphalt pad

I have what used to be a basketball court in my backyard. Its roughly 20x20 feet. I've already removed and sold the basketball hoop. On the end where the hoop was theres concrete piling sunk below the ...
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2answers
384 views

leveling concrete floor

I have to level a concrete floor that is more than 2 inches out of level. Should I be using self leveler, or concrete? Is 2" too much for self leveler?