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 should I consider when cutting/making window in concrete foundation?

I am thinking about putting in another window for my basement apartment. I would like to know what do I need to consider before trying to find a contractor to do this. I have uploaded a picture of ...
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1answer
23k views

What is the difference between building sand and plaster sand

Recently I mixed a batch of mortar for building and was unsure if the hardware provided me with building sand or plaster sand.. What are the properties that differentiate the two? and are there any ...
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289 views

How can I smooth an uneven concrete floor?

I have had a extension built at the back of my house. It is almost complete now. I had a 6 ft. 6 in. patio door at the back of the house, and the builders left it till last to remove. This will leave ...
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1answer
130 views

Does Limecrete exist in North America?

I've been learning a little bit about limecrete And I thought it'd be fun to try a project with it (small one) but I can't seem to find it as a product in North America. Most (all?) references to ...
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2answers
306 views

Is this normal for the brick to extend past the concrete slab foundation?

I am in the process of buying a home and noticed that the brick extends past the concrete slab foundation. I checked different houses around the area and all were flush with the concrete slab. Is this ...
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2answers
448 views

Can I use EPS concrete for a fire bowl?

I found this recipe for EPS concrete, and am thinking of using it to make a fire bowl (a decorative concrete bowl like the one described here, which holds a chafing dish gel fuel pack.) I would like ...
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2answers
463 views

How to level sloped concrete ceiling, and is it worth it?

I want to remove popcorn ceiling in a 7' by 14' room and turn it into a smooth ceiling. I have just built this room. The walls are not yet painted, so now is a good time to do the ceiling. I know how ...
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1answer
1k views

How to reinstall iron stair railing in concrete that rusted out at the base?

So one day some time ago our iron stair railing going from the sidewalk to the stoop rusted through at the base of the posts and fell right over. I had a welder friend cut off the rusted portion and ...
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1answer
655 views

How do I rebuild a large fence gate?

I have a concrete driveway that continues to the side of my house, with a double gate (a person gate, and a large vehicle gate). The gates are very old and made only with 2x4 frames and standard ...
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1answer
759 views

Can I fill sagging spots in my driveway with asphalt and hot tar?

We've had these sagging spots for about 10 years now. They're not getting any worse. Sure, we might get a new driveway in 10 years, but other than this, our driveway is in beautiful condition! They ...
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1answer
1k views

How do I make this large mold for concrete countertop?

I've been wanting to make a concrete counter-top for a long time but there's one section that is giving me trouble. The mold would have to be bigger than would fit on a standard 4' x 8' sheet of ...
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1answer
247 views

Can you apply surface-bonding cement over stucco as an exterior finish?

Let's say you have a wood-framed wall with cement-based stucco cladding and it's in pretty good condition, with a few typical stucco cracks. If you wanted to seal the cracks, add another layer, and ...
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1answer
3k views

Can I put concrete over PVC pipe?

I have my laundry room in the backyard and there is an area that had a thin piece of concrete and below it there is soil. Beneath the soil there lies the drainage PVC 1 ½” pipe, gas line (not ...
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2answers
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How to plug hole in foundation?

Here is the front of my house. As you can see it is a 2-story dwelling on the left with a garage on the right that is connected to the main house by a "sunroom" (porch/breezeway/whatever). The main ...
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2answers
412 views

Technique to level a patio for concrete and tiling

I currently have a large patio which has brick paving. unfortunately the paving has started to sink in spots and gathers rain water. I will be removing the brick and laying a slab of concrete, in ...
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3answers
4k views

How to raise a wooden floor to same height as adjoining concrete floor before carpetting?

I have a room which has a concrete subfloor on one side, and wooden floor boards on the other. Unfortunately the wooden floorboards are about 1.5cm lower then the concrete. What's the best way to ...
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1answer
195 views

How to level concrete floor that is chipped and has left over thinset

I removed some tile from a 10' by 15' section of my basement floor. As I was removing the tile, much of the concrete chipped away leaving low areas. Other areas have thin set remaining in the shape ...
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1answer
350 views

Can a conical form for pouring shorter concrete footers be used for fence posts?

The frost line is 1.2m deep in my area. That seems like a lot of concrete to pour for a fence post. I'm wondering if a better way is to make a shorter footer following the suggestion that's used in ...
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3answers
2k views

How to connect wood to concrete

How can I attach wood to concrete in this bench?
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1answer
456 views

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
188 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
680 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
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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
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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
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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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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
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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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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
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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
876 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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5answers
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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
186 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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538 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
801 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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318 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
694 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
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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
1k views

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
774 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
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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
484 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
170 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
877 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
238 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
229 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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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
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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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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 ...