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 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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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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169 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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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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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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Do I have to remove the old thinset before installing new tile?

I will be installing some new 12x12 tiles in two bathrooms approx 25 sq/ft each. When I pulled up the old tiles, there was no thin set that had made contact with them so the removal was very easy. ...
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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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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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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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How can I stop mortar plugs from popping out of slab holes?

Our termite people plugged their dozens of chemical insertion holes using a regular grout. Needless to say the plugs are popping out left and right. (They tell me that is normal, the plugs pop out in ...
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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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How can I remove water-based emulsion paint from paving slabs?

On painting the bedrooms in our new house, we've gotten some (mainly) water-based paint on some of the paving slabs on the patio. A little of it may be oil-based gloss we used for skirting boards, but ...
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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. ...
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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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300 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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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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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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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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Should gloves be worn when working with concrete to prevent it from coming in contact with skin?

I was told recently that concrete is slightly corrosive. Should gloves be worn when using concrete or is it fine to handle concrete as long as its not done on a regular basis?
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What is the best way to remove pet odor from concrete?

The concrete floor in my garage had been home to a large dog for several years. There is a visible stain and strong smell in one area of the garage floor. The concrete does not appear to be sealed ...
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682 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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How to make 3“ concrete ”legs" via reusable casting structure?

I have a design for a (set of) planter(s) I'm trying to make, and to make the design I have in mind, I need an 18" long 3" OD leg with a bit of rebar in them. (let's say 100 of these bad boys in ...
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437 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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796 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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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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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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417 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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What do I level a 2" slope in my concrete basement floor?

I want to finish a 12'x36' part of my basement. The trouble I am having is that it is sloped to a floor drain. I was told that DRIcore and shims would work but the drain is a 2" slope down from the ...
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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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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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505 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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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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435 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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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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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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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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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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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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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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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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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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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 ...