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 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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986 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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2k views

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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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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414 views

Can I use blind rivets in concrete?

Somebody told me about using blind rivets (5mm) to attach drywall steel tracks on concrete floor and ceiling. Do that really works? How good is this compared with bushing and screw?
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435 views

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 ...
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183 views

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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1answer
4k views

How do I create a curved surface drain out of concrete?

I have a barn and a pump house (10x16) structure that are within 3 feet of each other, built in 1910. The barn's foundation is field-stone, mostly exposed on the side of the pump-house. There is a ...
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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

Is it possible to paint concrete pavers

I have a large paved area that I would like to replace with lawn. My plan is to use some of the pavers as a border. They're plain concrete pavers (450x450mm) that look like this except about 20 years ...
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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 ...
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Is it safe to drill small holes in load-bearing concrete beams for expansion bolts?

It seems to be very common to drill small holes in any kind of structural concrete for mounting fixtures without worrying too much about any kind of reduction in strength of the structure, but I ...
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477 views

How do I safely install a pole/mast on our roof?

We are installing a pole/mast for wireless communication equipment on the roof of our commercial building. The pole will need to rise 2m above the roofline. Obviously we want the pole to be as ...
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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 ...
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1answer
2k views

How should I build an exterior door landing pad?

I've got a building with several exterior doors (all opening inward). The slab and walk-up is about 18+" from the ground. Code requires that I have a 36"x36" landing pad outside each exterior door. ...
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2answers
6k views

What cement product should I use to fix a hole in my slab?

I was removing old thinset and self-leveling cement in an area in preparation to tile it when the 6" chisel and demo hammer I was using sunk in to a specific spot. I found that this specific spot had ...
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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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1answer
178 views

How can I remove ridges from a concrete shower pan?

I recently laid a new concrete shower pan, and went around the drain radially, which created some circular ridges. I'd like to make the pan as smooth as possible, but these ridges are currently 1/8" ...
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1answer
738 views

What is the difference between fire cement and fire concrete?

I am trying to build a foundry. The Youtube video refers to 4:1 Perlite:Fire Cement. But the shop also offers Fire Concrete. I don't know what's the difference. Could someone please explain the ...
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6k views

Is it normal to find cracks in new concrete?

I'm having a house built and they just completed pouring the slab for the foundation a few days ago. When I inspected it today I noticed several narrow (but sometimes long; one or two do them appear ...
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1answer
943 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", ...
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3answers
4k views

How do I hang a chair from a concrete ceiling from a single hook?

I'm putting in a "hanging chair" in the basement and it's supposed to hang from a single hook in the ceiling. The ceiling is reinforced concrete. Now, I'm about 125 kilograms (275 lbs) so I reckon ...
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3answers
856 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 ...
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2answers
219 views

Should I use concrete, or some other method to fix this entry area?

I have an entry walkway that's 9ft x 4ft by my front door that I need to fix so it is solid ground. I was thinking of putting concrete down and then laying tile on top of the concrete. I have some ...
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5answers
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Do they make a non-liquid concrete/mortar color additive?

I've been trying to find a cement additive to change the color of some mortar, but only seem to be able to find it in liquid form at my local big-box hardware store. I'm looking for a similar ...
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Can I use landscaping lava rock as a concrete slab base?

The side of our house if continually overrun with weeds. I'm thinking of fencing it in and laying some concrete to prevent the weeds and provide some storage area. Currently there is red lava rock ...
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402 views

How do I patch these sections of concrete driveway meeting the house?

Where my driveway meets my house there were two sections of loose concrete that were deteriorating and making a mess. I removed the loose concrete and discovered that those sections were placed on ...
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1answer
315 views

Will this floor tile break?

So, I've got some 12"x12"x1/4" tile laid over a concrete floor. I'm cleaning up between the tiles getting ready to grout and I notice I can see some concrete between and underneath (the small amount i ...
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1answer
462 views

What type of concrete sealer to use to prevent frost heaves in my driveway?

I am about to put concrete sealer on a driveway and inside a garage. What sealer should I apply, if I am specifically interested in preventing water from getting in cracks and causing frost heaves ...
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How can I make these concrete columns?

I want to make a narrow concrete, decorative column like the ones found in this garden.. What is used as a mold for these types of columns? What gives the concrete those subtle color changes (the ...
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4k views

how do i get rust stains off driveway

I used fertilizer with iron and, unfortunately, didn't sweep adequately afterwards. Afterwards I ran my sprinklers and now my driveway and sidewalk are peppered with unsightly rust stains. What are ...
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2answers
3k views

What is the best way to fill a 3 inch gap under my concrete front porch?

I'm in need of some help with my concrete foundation. As I was leaving the house this morning I discovered two or three skunks crawling into a gap under my porch. The hole is on the bottom of the ...
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2answers
804 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 ...
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1answer
893 views

How to patch concrete as invisibly as possibe?

I had a plumbing repair done this week that required them to jackhammer a small hole through a concrete porch in front of my house. It is small enough that I’ll probably attempt the patch myself, but ...
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1answer
368 views

How to prepare poured concrete wall for adhesion

I am considering the application of an artificial stone wall veneer onto a poured concrete wall. The wall is flat with no protrusions or other which might aid in adhesion. I do not know if any release ...
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2answers
147 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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1answer
468 views

How to Level Concrete for Sliding Patio Doors?

I'm replacing an outdoor sliding patio door set with a new one that has almost the exact same dimensions - luckily the previous homeowner (family) did not go with custom-sized doors. The issue is ...
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1answer
224 views

How do I best build up concrete driveway where it meets the basement foundation of house?

Our driveway slightly slopes into our basement foundation wall, causing water to stand in that area. We don't want to simply add cement to this area to elevate it one or two inches because of our ...
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1answer
3k views

How can I repair my concrete porch?

I have a concrete porch upfront which has 2 pillars supporting a roof. The concrete is showing cracks and spalling. To repair can I resurface this? A friend suggested tigercrete (concrete with ...
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239 views

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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2answers
366 views

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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2answers
193 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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4answers
585 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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8answers
1k views

How do I secure a canvas garage?

I picked up one of those cheap canvas garages from Costco, to keep a few things out of the weather. It's 10' wide, 20' long, and maybe 11' high at the peak. Our area is a bit prone to windstorms. I'm ...
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2answers
611 views

What is an appropriate sealer for a Papercrete bench?

I've built a bench out of tires and papercrete two years ago. i've sealed it with lime plaster. in the past two years it held up against 500 m"m of rain in the winter and Mediterranean sun 7 month ...
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1answer
500 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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1answer
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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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 ...
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1answer
781 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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2answers
2k views

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 ...