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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I did a bad job pouring a cement walkway, how can I fix it?

I poured three 4'x4' slabs to make a walkway beside my house. The first two look alright but the third one is a half inch lower than the one next to it and slopes up at the open end where I want to ...
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2answers
169 views

How do I remove concrete that has splattered on my brick pavers?

We installed a brick patio, and splatter from wet-cutting the bricks ended up on the installed bricks. How do I clean it?
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3answers
649 views

How should I remove a raised concrete pad on my basement floor?

I have a raised square of concrete, about 42" by 42" by 6" in my basement. Its probably an "equipment pad" of some sort, not sure what it was originally for, but it is inconveniently placed. Its ...
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2answers
5k views

Howto convert old basement slab into finished concrete floor?

Doing a complete remodel, after Boulder flooding, of my basement. After demoing and floodcutting, all that's left is framing and concrete slab. I'd like to turn this into a nice concrete finished ...
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2answers
3k views

Which is better/safer for cutting concrete slab, hammer drill or angle grinder?

I have to cut a 100x500 mm hole in a concrete slab that is about 80-100 mm thick. I think that I have two options to do that: 1) 9" angle grinder with segmented diamond disc: cut the long sides, then ...
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1answer
1k views

What is the best way to secure (2x6) wood framing to the concrete portion of the garage opening?

I live in a raised ranch. The lower half of the house is divided into a 2 car garage and a living area. Also the lower half of the house has 8 ft. ceiling (about 4 ft. concrete walls and 4 ft. wood ...
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2answers
677 views

Are there any rules of thumb for whether a concrete pad needs metal re-inforcement and if so, how much?

I may be doing some concrete work soon around the house and I'm somewhat of a novice at it. One thing that I am unsure about is when I need to reinforce the concrete with re-bar or other metal ...
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1answer
11k views

Are cracks in a newly poured concrete basement floor a problem?

I'm having a new home built and found a large crack in the newly poured concrete basement floor and wanted to see if it's something I should be concerned about. The floor was poured sometime in the ...
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44 views

Latex paint over concrete primer

I have put concrete primer on my poured concrete walls in my basement. I have enough of construction latex paint primer to go over it all again. Is it okay to use on top of the concrete primer and ...
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5answers
9k views

Can I build a deck this low to the ground?

I want to build a deck off the back of my house. The door is near grade level, about 1' above. The grade doesn't have very large slope, so that means that the beam at the far end would be below grade: ...
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1answer
831 views

How can I drill through concrete blocks to allow drainage from my backyard?

My back yard has a brick floor and is surrounded by a concrete block wall. In heavy rains, the yard pools with rain water. How do I go about cutting drain holes in the wall or floor?
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How do I move a slab of concrete?

I want to build a fence in my backyard by my garbage stand is sitting on a concrete slab and that slab is in the way of where I want to put the fence so I want to move it over a few feet. The slab of ...
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0answers
185 views

Can I repair the cracks between the bricks in my fireplace?

The bricks surrounding my fireplace have cracks between them. It's as if the thermal expansion/contraction has eroded the mortor between the bricks. I have had some serious fires in there and haven't ...
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2answers
512 views

What 'quick & dirty' finish for a concrete floor

I am moving into a new home for 1-2 year period. Its an old office building and the landlord is flexible with how I decorate; as it will eventually be totally gutted and renovated. My 3 rooms are ...
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1answer
765 views

Attaching sill plate to concrete, how do I attach framed wall to sill plate?

I am building a 12x12 shed on a concrete slab. I am going to bury j-bolts in the wet concrete so that I can attach the treated sill plate to it. The problem I'm running into is that the nut will be ...
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0answers
312 views

How to hang shelf on 2cm thin wall?

I would like to somehow saw out a wood board that fits into the corner as seen on the picture below. The problem is that both walls are only 2cm thin. The shelf needs to be able to hold a pair of ...
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1answer
679 views

Concrete Mix for making small objects [closed]

I want to build desk objets out of concrete, such as the ones in the images below ( i don't own any of them, they have been taken from around the internet). ...
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3answers
6k views

Can I pour concrete if it's raining out?

I have 6 bags of concrete that I need to mix and pour for 2 deck piers. It's raining lightly outside. Should I reschedule or just do it and cover with plastic when we're done?
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2answers
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What should I do about a crack in the concrete slab in my living room?

We purchased the house about 2 years ago. The house is about 50 years old. Today we removed the carpet and the hardwood floors under the carpet. We found out the slab has an approximately 10ft long ...
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1answer
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What should I do about my concrete shower curb that I did not remove all the air bubbles from?

I'm building a concrete shower curb and pan. I built the curb and when I removed the 2x8 forms I notice that I didn't pack the cement all the way to the bottom in some parts: A bit crumbled and ...
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1answer
765 views

How do I flatten my uneven concrete floor?

We have an old Victorian house with a concrete floor throughout the ground floor. The ground floor is partitioned in two by a dividing wall and french doors. From the front of the house to the ...
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2answers
7k views

How do I seal a large gap between slabs to avoid freeze/thaw heaving?

I have a very large slab patio on the back of my home in Southern MN that has pulled away from the house about 6-8" due to freeze/thaw heaving. The previous owners have filled the gap with river ...
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1answer
481 views

How to secure bookcase to drywall right over concrete without drilling concrete?

I got some tall bookcases and want to set them up against a wall in a condo. The wall is shared with my neighbor and as such it seems to be a half inch drywall right over a concrete wall, so I don't ...
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2answers
162 views

Repairing animal damage in concrete driveway

My driveway has a few separate slabs (is this the right terminology?) and an animal has been digging in the gaps between two slabs. The gap is 1 - 1.5" wide. It looks like the rain is washing away the ...
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2answers
836 views

Building on top of 3/4'' plywood subfloor

I want to build this: http://www.mrmoneymustache.com/2012/12/21/how-to-make-a-relatively-sweet-shower-cheap/ and I'm building in my basement bathroom: on top of the foundation I have 2x4 (horizontal) ...
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1answer
231 views

How do I prepare a hole for concrete?

I removed a chimney from my house earlier this year. After everything was cleaned up, I was left with this big hole: I have two questions: (1) How do I know what type of concrete to use? (2) How do ...
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1answer
218 views

Removing concrete lip at garage

I am interested in removing a garage concrete slip (31"Wx8'4"Lx1.5"H) to accommodate a storm shelter (4'x8'). The slab is post tension. The project entails a diamond blade set to cut at a height of ...
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134 views

Repairing exterior cement wall

I have an exterior wall on one side of a brick building that appears to be stucco or cement. Some of it is starting to come off in sheets. Basically, there is one layer, maybe the thickness of orange ...
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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. ...
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2answers
6k 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 ...
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120 views

Applying thinset to concrete floor

I am planning to install ceramic tiles with a "Warmup" heating element beneath them. My first step is to install 1/4" insulation boards on the concrete floor using non-modified thin-set. The floor ...
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3answers
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How do I remove THIN layer of carpet glue from concrete?

The folks who owned this house before us were the cheapest people around. They glued carpet to our concrete floor with a very thin layer of glue. Now, I'm having a terrible time scraping it off. I ...
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2answers
516 views

How can I fix my concrete front porch landing

My front porch is concrete, but it's too far below the front door, so there is a landing. The landing is also concrete. However, this landing is not long enough (in the travel direction, IE when ...
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4answers
774 views

How can I prevent cracking in concrete (or earthen) walls from the freeze/thaw cycle?

I'm interested in building a garden wall from either concrete or rammed earth, or a mixture of the two, but I'm concerned about Michigan winters and the havoc they wreak on everything solid. It seems ...
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2answers
5k 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?
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1answer
425 views

How do I form and pour long concrete steps for an exterior staircase?

I want to replace some concrete blocks with proper stairs in front of my house. They are wobbly and dangerous. Attached is a photo of what is currently there. I have been unable to find anything ...
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0answers
128 views

Can I add cement glue and sand into my concrete mix to repair my cenent garden statue?

I have a leopard concrete garden statue that was given to me by my neighbor that has a broken foot and log. I want to repair it and paint it. It also has been weather eroded so I need to recover it as ...
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2answers
289 views

How should I waterproof a concrete roof?

We have a 28y/o Medical Clinic in a remote area of Haiti. The roof is concrete and has one coat of DryLoc on it which is lifting off in many areas. The roof is 136' X 35' with a very slight pitch to ...
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2answers
5k 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 ...
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1answer
889 views

How can I get the 2-part epoxy smell out of concrete?

Six months ago or more, my friend used a 2-part epoxy (no longer have the packaging, but it's a double-syringe with clear liquids, purchased at Home Hardware) on something, and some of it (one or both ...
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2answers
4k views

How should I paint my basement floor?

I have an 80 year old basement concrete floor that recent had asbestos tiles and mastic removed. It is in good shape, with a few hairline cracks. I am planning on painting it. The basement is dry, ...
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1answer
903 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 ...
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1answer
251 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 ...
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1answer
404 views

How can I patch my slab around a rough-in pipe in a difficult to access location?

I've got a situation similar to this one (slab finishing/patching around roughed-in plumbing remodel), but in my situation the finishing job poses a couple extra problems: 1) The trench routes under ...
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0answers
227 views

How do I level a summerhouse concrete base that dips in the middle?

I laid a 4x3 metre concrete base for my summerhouse/office thing. The corners are all level and so the summerhouse sits fine, but it dips in between and so the load bearing battens aren't taking any ...
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2answers
253 views

How do I go about making 1“ and 2” thick “boards” for concrete furniture?

I have designed a cement feeder for hogs, for my hobby sized farm. It is generally based around a professional one we already had. I have planned on different parts of it being 2 inch, 1.5 inch, and ...
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4answers
5k views

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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2answers
727 views

How deep should I drill a pilot hole in concrete for a 2 inch screw?

For fixing a 2 inch screw on concrete wall, how should I drill for good strength and no damage to the wall. I tried a 2 inch screw and drilled for 1 1/2 inch and later tried to screw it into the hole. ...
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1answer
287 views

How do I remove a small amount of water based concrete sealer from a painted floor?

I was using a water based concrete sealer on my painted concrete floors. I did something wrong, and one tiny section didn't dry clear. My question is, what can I use to remove a small portion ...
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1answer
305 views

How can I fix a tilted concrete shed footing?

We just bought our first home, and it came with a shed (hooray! Workspace!). The shed has a footing that's about 8" wide and runs the perimeter of shed, and at some point erosion has caused the part ...