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.

learn more… | top users | synonyms

3
votes
2answers
3k views

How can I level concrete pavement for an above-ground pool?

I want to set up an above-ground pool (14' round) on my back yard. There is a relatively good place for it, where there are concrete slabs, however, there are two problems: The slabs are not level. ...
3
votes
1answer
240 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 ...
3
votes
2answers
392 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?
3
votes
4answers
2k views

How can I improve the cold floor in my ground-floor unit?

My home is a ground-floor unit in a condominium. The floor is really quite cold and I'd like to do something about that. I saw in another question the suggestion to use Platon. Would I be able to put ...
3
votes
3answers
2k views

Can I lay pavers over a concrete patio?

I have a concrete patio in my backyard that's in pretty good condition. We don't like how it looks, so we'd like to cover it up with brick or pavers. Looking online, it appears that most people ...
3
votes
3answers
2k views

Renovating Crawlspace with Poured Concrete Floor

My newly-purchased 1950s home has a below-grade crawlspace with a poorly-poured concrete floor. Specifically, it is very coarse and looks like it was poured and spread with a garden rake. In some ...
3
votes
3answers
2k 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. ...
3
votes
3answers
887 views

How can I get windshield wiper fluid stains out of my garage floor?

My car's windshield wiper fluid reservoir had a leak and quite a bit of it soaked into my garage floor (which is a light concrete). It happened over night, so it soaked quite a bit. Now the floor is ...
3
votes
2answers
4k 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 ...
3
votes
2answers
978 views

How do I install drywall when the door is too close to a concrete wall?

I'm looking for suggestions to finish one of the walls in my basement. I've included the pictures of the wall below. As you can see the doors are right up against the wall on both sides. There's ...
3
votes
2answers
78 views

What can I do about my deteriorating basement floor with a large hole that seems to go right through to clay?

We live in 90 year old house with an unfinished basement. I've been working on removing a lot of the crap that the previous owner did, and removing a lot of concrete debris. Then I ran into this ...
3
votes
2answers
134 views

Should I patch this hole in my slab?

I'm in the process of tearing out carpet and installing laminate in my guest bedroom. After I got the carpet out, I discovered a hole several inches across underneath the wall that borders the garage. ...
3
votes
4answers
186 views

What is the laziest way I can build a non-structural, non-aesthetic cinder block wall to contain compost?

I have a ton of brush that I used to burn, but I recently bought a chipper/shredder and want a spot to compost it along with grass clippings and greens. I also have 3 tons of CMUs that are just ...
3
votes
1answer
691 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 ...
3
votes
1answer
210 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 ...
3
votes
3answers
27k views

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 ...
3
votes
2answers
2k views

Should I use solid concrete or cement block for an egress window well?

I am having some contractors build a window well for an egress window at my house. I have the option of doing solid concrete walls for the window well, or cement blocks (which he said he will fill ...
3
votes
1answer
966 views

How do I fix an uneven cement floor prior to hard wood flooring install?

I have recently ripped up carpet and padding on a cement floor for a sixth floor condo unit. I plan on installing 3/4" Bella, 3' wide flooring on it. The problem is that there is a ridge, about 1/8", ...
3
votes
1answer
702 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 ...
3
votes
1answer
106 views

What is the recommended thinset when tiling over concrete?

I am about to start tiling a concrete area of my home about 220 sq feet. I was wondering if there is any specific type of thinset I should be using for a concrete surface. The tiles will be 12x12" ...
3
votes
2answers
2k views

How do I level a concrete basement floor with a 1" dip?

I want to level my concrete basement floor, but on one end it slants down over 1" (over a 3'x15' run). Can I fill this area before using self-leveling compound, to save money, or what else could I ...
3
votes
2answers
3k 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 ...
3
votes
1answer
2k views

How can I paint/stain an interior concrete floor?

I have a very lovable aging bulldog who has peed on the wall-to-wall carpet enough that I'm ripping it out. It's over twenty years old anyway. The subfloor is a concrete slab. My goal is to make the ...
3
votes
1answer
722 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: ...
3
votes
1answer
1k 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 ...
3
votes
1answer
1k 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) ...
3
votes
2answers
2k views

How do I add veneer stone to an exterior painted wall?

I have an exterior painted wall and am interested in installing a stone veneer. I realize that I may have to install wire mesh to the areas but I'm wondering if there is a material that can be used to ...
3
votes
1answer
487 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 ...
3
votes
0answers
108 views

Did I properly grade the ground around my house? [closed]

I had some water issues in my basement recently. Taking a good look at all the possible causes I noticed the landscaping around the front my house was slopping in towards the house. So to fix this I ...
3
votes
3answers
3k views

Basement subfloor, how exactly should I do it?

I am finishing a basement with my father and want to put in a subfloor. I know if there was ever enough water I would probably have to replace the floor anyways but want to give myself a couple inches ...
2
votes
1answer
660 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 ...
2
votes
2answers
114 views

Is the proposed solution to this masonry project okay?

We will going to build long interior, round(little bit) shaped staircase (similar to this) from concrete, and I needed to get instructions with physics that it will possible to make it without any ...
2
votes
3answers
25k views

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. ...
2
votes
4answers
757 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 ...
2
votes
1answer
547 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 ...
2
votes
2answers
197 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?
2
votes
2answers
7k 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 ...
2
votes
2answers
3k views

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?
2
votes
5answers
19k 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. ...
2
votes
2answers
4k views

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 ...
2
votes
2answers
844 views

Installing subfloor and hardwood on top of concrete (2nd story)

I bought a condo in a triplex where I basically have all of the 2nd floor. Most rooms are on hardwood, while the rest is on laminate with a serious height difference of an inch and a half (hardwood ...
2
votes
3answers
1k views

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 ...
2
votes
2answers
2k views

How can I replace laminate with polished concrete flooring?

I'd like to investigate whether I can replace my first-level flooring - currently faux-wood laminate - with polished concrete. What do I need to know? Is it even practical to put down polished ...
2
votes
2answers
2k 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 ...
2
votes
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 ...
2
votes
2answers
2k views

Concrete slab at a brick wall

I want to build a concrete slab (upon which a deck will be build later) at the foot of a brick wall (by foot I don't mean the foundation foot, I just mean where the brick meets the grade level). I ...
2
votes
2answers
268 views

How can I remove a parking block from my garage?

So, builders have this thing, for some reason, of installing cement parking blocks a few feet in front of the hot water heater in the garage. I've lived at plenty of places without those and managed ...
2
votes
1answer
52 views

Use less water with concrete water reducer?

Reading up on concrete water reducer additives, it says it "reduces water by 5% - 10%". I assume this actually means that it reduces the required amount of water? I.e. I would mix in less water, ...
2
votes
2answers
102 views

How can I grind and smooth a concrete table top?

Hey guys so I just welded up a table and now I am going to make a table top. So here is the problem. I welded the table up and looks square but is off about 2 degrees here and there from heat warpage. ...
2
votes
1answer
197 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 ...