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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What type of subfloor should be used for Engineered hardwood flooring installed on grade concrete slab?

I would like to install engineered hardwood flooring over a concrete slab which is on grade. It is the first floor of the house, there is no basement and the house was built in the 1990's. I have seen ...
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2answers
616 views

How to repair / reinforce deteriorated footings and subsoil below brick & concrete porch

My fiancee and I recently moved into a 1922 brick craftsman-style home. The front porch has a ~4" poured concrete floor and large solid concrete railing caps (12"W x 4"D). Brick columns support the ...
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3answers
78 views

How do I patch a hole in concrete sidewalk over open tunnel?

There is a sidewalk running over an old tunnel. It's near a grade school, and is used often by faculty and students. The tunnel is completely open, but blocked at both ends so there is no access ...
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1answer
342 views

Repainting my lanai floor

I'm painting my lanai floor and it has been painted last year but changing the color. Did one area and let it dry 24hr. and I can scratch it off/ I used the paint Home Depot sold me for concrete. What ...
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58 views

Reinforcing a boulder/concrete wall

Our fixer-upper has a freestanding wall outside, that is built of melon-sized boulders cemented together. The back side was left rough, and we're starting to get cracks (I patched with cement-all). So ...
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2answers
218 views

Laying Vinyl Flooring Over Uneven Poured Concrete

I am trying to give my basement floor an update, and I have purchased a click and lock vinyl floating floor. The existing poured concrete has some raised areas (where the concrete was clumpy and not ...
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3answers
798 views

What is the easiest way to cut a 2 inch groove in concrete?

I have a 5 foot wide concrete side-walk running next to my house. I want to cut a 2 inch groove from the wall to the yard in order to run a PVC irrigation pipe from the faucet on the wall to the ...
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1answer
93 views

How to fix concrete cracks with weed growing out?

I have cracks on my concrete stairs that have weeds growing out of. I was wondering what the (caulking-like?) product is to fill the cracks. Should I spray some sort of herbicide to supress growth ...
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2answers
330 views

How does a snowblower perform on exposed aggregate concrete?

I wish to replace my asphalt driveway with concrete. I am hoping to do something a little more visually interesting than just a slab, though. I like the look of exposed aggregate, but I am concerned ...
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2answers
6k views

How do I get rust stains off my 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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1answer
102 views

how to make a half circle tunnel through a cement slab?

There is a slab of concrete in my backyard, and I need to make a half circle cut out in it like this picture below. This is for a 3" pipe to sit in. How would I go about doing this?
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3answers
27k views

How can I prepare uneven concrete basement floor for vinyl planks?

I have roughly 600 sq ft of basement that needs new flooring after some unfortunate flooding this past summer. We had carpet over concrete and are now looking to lay vinyl planks down. There is about ...
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3answers
48 views

Unsure if structure is solid concrete

My home was built in 1957. It has a 10x10 3foot high brick patio with a concrete slab on top. We are replacing the deck which is much bigger. The deck on the slab rotted due to water pooling in a ...
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0answers
49 views

Is what I have done suitable?

I put down onto a concrete floor, 5mm plywood, 4' x 6' strips then placed 9mm OSB Boards, 6' x 4'. Will this be acceptable before putting down carpet or?
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1answer
156 views

How can I refinish a basement concrete floor?

The basement concrete floor pictured has traces of red paint, a beige mesh, the concrete itself, and a top blue-gray layer of paint. Does refinishing the floor require reapplying the red and the ...
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10answers
9k views

Is this cracking foundation under a jack post a problem that requires repair?

I am buying an already-built new home. I find this in the basement. The builder says it's okay, but I am really concerned. Is this really a big issue? What steps would be required to repair it? This ...
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4answers
942 views

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 and a putty knife. Needless to say the plugs are popping out left and right. (They tell me that is normal, ...
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0answers
40 views

ingredients used to make concrete textured walls

Ive recently built a dozen or so large boulders that are now used as landscaping around my pool. In learning how and what to mix {you tube}, I seen other how too videos about refacing a block wall ...
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0answers
103 views

Rebar Spacing in a concrete footer

I have some rotting timber retaining walls that were built between boulders. I want to replace them by pouring concrete footers and stacking CMU blocks. I also want to add some rebar to help ...
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0answers
64 views

Monolithic frost proof shallow foundation, advice on the smaller details?

I'm building a 16x24 shed/garage. I have done most of the site work and I have a concrete guy starting tomorrow on the forms in preparation for a pour on Friday. He's done insulated slabs, he has 30 ...
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3answers
15k 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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2answers
145 views

What type of contractor would I hire to level a concrete floor?

I am doing some renovations, and I've recently uncovered an original concrete floor that I would like to have leveled for carpet to be installed. It's currently sloped from level with the adjoining ...
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2answers
1k views

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

I bought a condo in a triplex where I 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 being ...
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3answers
2k views

Pure concrete hollow cylinder

My intention is to build a hollow concrete cylinder for a fire pit like this: There are a few people who have done this by using steel sheets bent in to shape with supports between, but I would ...
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3answers
40k 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. ...
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0answers
36 views

Fixing foundation crack with repair kits

I have a crack in the foundation visible on both sides, interior and exterior on an older home (built in 60's). In my case the foundation does not seem to be sagging. I have received some advice ...
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3answers
23k views

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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0answers
37 views

How do you refinish a concrete countertop?

I have concrete countertops in my kitchen that, unfortunately, weren't sealed properly. They quickly began picking up stains from water, so the contractor that made them took them back and somehow ...
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1answer
98 views

How to minimise the amount of concrete needed for a shed foundation?

I’m looking to build a 6m by 3m shed in the back garden. It will be jammed in between 3 neighbours’ gardens, so it will have to be less than 2.5m high. Roof will most likely be a low grade pitch with ...
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2answers
277 views

Please reassure me about basement french drains

I understand the principles and practice of putting in a basement perimeter drain... but I've got a slightly irrational paranoia about the concept of cutting the basement floor free that way. ...
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0answers
41 views

Kerb concrete slab

I'm thinking of using some kerbing to retain a small mound of earth from falling onto a new concrete slab drive. But I'm not sure whether to add the kerb before or after laying the concrete slab. If ...
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1answer
88 views

why is there a concrete pole in my wall?

I broke open a section of wall I'd like to remove and there is a concrete pole inside!? Is this some kind of load bearing device? How can I know if I can remove it? Thanks
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123 views

How to seal joint between stone foundation wall and conrete cellar floor

In my 1910 vintage Baltimore row house, the concrete cellar floor was laid after the construction of the house. The joint between the irregular surface of the stone foundation wall and the concrete ...
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2answers
57 views

What primer should we use on a previously painted concrete wall?

We are preparing to prime and paint over previously painted interior concrete walls. The walls have oil residue (from an oil furnace) that is embedded in the rough surface and we were unable to fully ...
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5answers
224 views

Can a regular rasp be used to enlarge a hole in concrete?

I need to enlarge a few holes from 40mm to 50mm in a cinder block wall and in a concrete beam. Chiseling will do much damage and need patching, can I rasp it with a wood rasp?
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0answers
51 views

Can I expand a concrete slab by 3/4"?

I have an above ground exterior concrete slab that we'd like to surface with 2" x 2" porcelain tiles. The slab is just a little too small – about 3/4" in one dimension. I'm wondering if it would work ...
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1answer
2k 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 ...
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0answers
40 views

How do I finish a concrete floorÉ

My basement has a concrete floor that is all jagged. It`s missing about 1 1/2 inches of concrete to be even with everything else....what do I do?? Will self-leveling cement adhere to such a ...
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3answers
6k 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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3answers
404 views

How to get water to hop from patio over brick wall?

I have a concrete patio elevated a few feet above the lawn. The patio is bordered by a brick wall (on 3 sides, with the house on the 4th) that extends higher than the top of the concrete of the patio ...
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3answers
476 views

How to attach a monkey-bar/playground structure to the ground in my backyard?

I would like to build a monkey-bar/playground structure in my backyard. It's not your standard monkeybars, but I made a 3D visualization at staktrace.com/pub/structure.html if that helps. I'm planning ...
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3answers
788 views

How will concrete fill in?

So I am pouring some footings for a deck I am building and my current plan is to dig a hole that is 18" wide and 18" deep. I'm then going to suspend a sonotube about 6 inches above the bottom (using ...
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7answers
13k views

How can I pour a concrete floor over a particle board subfloor?

I want to pour concrete over the particle board subfloor in my living room. I like the loom of stained concrete. We have a crawl space underneath. My question is what product do I use? How thick so it ...
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2answers
370 views

How to fix a sewer pipe leak in a prefab concrete floor

My house is built with prefab concrete slabs for walls and floors. These have been prefabricated with most of the plumbing and electricity tubes pre- installed inside the concrete. While redoing the ...
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2answers
148 views

What's the proper way to fill this hole?

Recently a dip formed in our flooring inside our sports performance training facility. We discovered that the concrete job there had a good number of stones in it, and I believe that it was that ...
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1answer
142 views

How do I pour concrete in an existing garage?

My garage had extremely poor flooring. I've removed it and dug down 11". I plan to use a plate compactor on the dirt, add 4" of crushed rock, compact that, add 2" of sand, wet that, wait for it to dry ...
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1answer
114 views

Is there a way to find rebar in concrete walls?

I was wondering if there is a way to find the tie rods and also plastic electrical conduit in concrete walls. In Ecuador all walls are made from poured concrete and plastic conduit is run. But it all ...
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2answers
1k views

Adding rebar to deck footings and piers?

I've heard a few people mention adding rebar to deck footings and piers to make them stronger, but I haven't been able to find any details on how exactly to do this. Is it sufficient to just hammer ...
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1answer
227 views

How long will Concrete bond together when poured over multiple days?

I've heard / read references to concrete being poured over 2+ days becoming "bonded" but I can't find any details to what the longest you can wait is. What is the longest you can wait between pours ...
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1answer
167 views

What timber to use for formwork or shuttering concrete base

What type of timber would you use to construct the formwork (shuttering). There seems to be 4 different types that I could use. Planed Sawn Untreated Sawn Treated Carcassing My particular ...