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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Retrofitting a sloped bathroom floor

Current Situation I have a ground-floor bathroom (2.1m x 2.7m) with a level concrete base which has a smooth finish with some type of self-levelling aggregate. At present the concrete is covered with ...
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239 views

pouring concrete right next to asphalt driveway

I am planning to install trench drain in front of my garage. The driveway to the garage is asphalt (less than 2" thick), and the space between the trench drain and asphalt will be filled with concrete....
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2k views

Hanging picture on a very hard concrete wall

Situation: Appartment in a panel building. Very hard concrete walls -- all, thick or thin. No plastic hooks (like these on alibaba that usually work for people around do not work for me, the little ...
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518 views

Best way to make a hole in concrete wall

So my house has concrete walls and ceilings. There a few places i would need to remove some large holes like for vents or light fixtures. I was looking at a concrete hole saw which seems to be a good ...
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97 views

What is this landing/wrap-around feature on porch steps called.

What is this style or feature called? If it has a name...!
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81 views

Recessed lighting in existing concrete light fixture

I have some light fixtures that are currently used and covered with blind plates in the corners of a concrete ceiling room. I was wonder if there was anyway to convert those existing light boxes to ...
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92 views

Moist sandy gravel between frost-proof monolithic slab and insulation. Is it going to freeze and expand?

I’m planning on pouring a monolithic slab with insulation beneath to prevent frost heave of the ground below. It’s a somewhat common technique, there’s just not many folks I can find in Massachusetts ...
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92 views

Is there a purpose for the concrete border at base of this house?

My wife and I are in negotiations to purchase a house that is located in the Southeastern US. The home inspector was a bit baffled by the concrete border (first image) that runs along the back and ...
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46 views

Driveway conversion to dog play area

I have a concrete driveway in mediocre condition (square slabs that are of varying conditions--some small cracks) that is on the side of the house which is narrow enough that it is not very functional ...
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89 views

Concrete driveway cured too soon and surface cement washed away

I had someone pour a concrete driveway for me. About 6 hours after it was poured it felt like it had solidified and was now only a little damp so I wanted to start curing it. I used a hose to spray ...
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142 views

Concrete Steps Moving Away From House

I recently noticed that the steps on my front door appear to be moving away from my house. The gap is large enough that some small critters appear to be getting in the gap to setup a nice home for ...
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47 views

Fixing Incorrect Concrete Application

I have a 400 Square Foot garage that has a lot of gouges in the concrete floor. I purchased some primer and Concrete Leveler in order to fix the gouges. I made a mistake and accidently mixed 4 times ...
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80 views

Bathtub Drain Leak near Concrete

After recently moving into a home (built in the mid 90's and apparently went through a remodel at some point), the guest bathroom tub started leaking. I noticed the leak in the room on the opposite ...
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171 views

Stem wall forming questions

I'm getting ready to build a new detached garage - excavator coming this weekend! After getting a few bids, I've decided I'm going to pour the footer & stem wall myself, and contract the flatwork....
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58 views

Concrete Slab touching siding and accumulating moisture

In my house there is a concrete patio which is touching siding and foundation. Since the grade of the patio is not correct near the place it touches the siding water puddles in it after rain. I am ...
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28 views

Proper method to seal a heated crawl space

I have a heated crawlspace with a dirt floor. There are no vents, it is fully connected to the house, and currently has a pool liner and vapour barrier stretched over it, but it is not sealed. There ...
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350 views

How do I seal the cracks between my asphalt driveway and my garage concrete slab?

I am not sure if this is an aesthetic problem or not. I suspect that if I do not fix the damage properly the water will continue to infiltrate the cracks and it will create larger problems in the ...
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2answers
183 views

Maximum height of hand-shaped concrete curb?

I need to guide water flow at the end of my driveway (see this question). My plan is to put in a concrete curb or hump to guide the water. I've gone all over the map in thinking of how to build it, ...
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2answers
305 views

White stuff coming out of my wall when dry

We painted my wall two times already first was a dark blue and some white powdery stuff was spreading after the paint dried, now we painted it again now in purple and it still has the white stuff when ...
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78 views

Cracks in basement cement just poured

I saw this in my wall that was just poured. Contractor says its not a problem, I think it is.
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90 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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884 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
1k 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 trees....
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2answers
100 views

Making sense of an existing sump system

I just bought my first house, but I can't seem to understand how the sump worked. I'd like to make sure it's hooked up and ready to go should the basement ever flood. When I first walked in, the ...
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125 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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68 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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358 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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114 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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86 views

Can cured concrete be re-colored?

The well cured concrete stamped driveway was lightly rained on one morning. I was late for work and proceeded to spin the tires. Later I saw the repercussions of my haste. The spinning tire left a ...
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394 views

how much weight a specific sized concrete slab can carry?

Say I have a portion of 10x10 feets. I need to put a concrete slab for that. The thickness of the slab will go 4 inches. Is there a way to tell, how much weight this slab can carry?
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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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51 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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394 views

How wide does a 6x6 concrete post footing need to be using an elevated post base anchor?

I'm building a pergola over a paver patio. The pergola will dimension 11'x 11.5' on center of post with 6x6 posts (4 posts), tied together with sandwiched 2x12 beams. I've laid out footer locations ...
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261 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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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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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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71 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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123 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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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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40 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
110 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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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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2answers
284 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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42 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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147 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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5answers
274 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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60 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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288 views

This hole in a concrete porch needs fixing

I might buy this house and have never lived there. The porch has an big air space of maybe 4 feet underneath the slab. Some of the rebar at the bottom edge of the slab is visible when peering in. The ...
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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 ...