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 is the process for using a mold to make a concrete patio?

I have a concrete mold and I would like to know how I should prepare the part of my yard where I want the concrete pattern to go and after pouring the concrete over the mold how long should the mold ...
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55 views

Should the cement floor adheres to the concrete slab?

If I want to use a cement floor (with broadcast color hardener) over a concrete slab (laid over compact soil), should it adheres to it, or be separated? The concrete slab is rough, the cement layer ...
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858 views

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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174 views

What are the dimensions of the steel in the concrete slabs on the upper floors of my house?

Drilling holes (for curtains) in the ceiling of the 1st floor(2nd floor in the US) of my house I ran into a steel rod in the middle, running parallel to the outer wall. The steel is about 2.5cm in ...
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546 views

How to increase height of existing concrete slab?

An existing patio has flag stones set over a concrete slab. If you were to remove the flag stones and thinset, what would be the best way to raise the level of the existing slab to make up for the ...
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174 views

Do I use dirt or gravel to fill around a cement form for a fence post?

Background: I know you're not supposed to dig a really wide hole for a fence post hole. But the previous owner of my home did not know that. He or she dug a really wide hole, filled it with a bunch of ...
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Driveway expansion joints are rotting wood: What to replace the wood?

My driveway was poured in sections with lengths of 2x4 which remained between the slabs as expansion joints. Due to heaving and moisture many of these are in poor shape. I replaced one once by ...
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705 views

Should I use self leveling concrete to repair settlement cracked concrete slabs?

I have a concrete slab in the breezeway of my house that has several settlement cracks in it. Can I use self-leveling concrete to repair this?
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215 views

How to use fiber optics to illuminate glass tiles?

Just a cool idea I've been kicking around for about an hour, I'm trying to figure out how it could work. I'm considering doing this with backslpash tiles and maybe even some shower tiles. Ideas: ...
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56 views

Inner walls of house are all concrete block…?

I bought this house 9 years ago, it was built in 1954. A few years after I had gotten it, I decided to get creative and pull down some of the paneling on a wall that separates the kitchen from the ...
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Treating a crack in a concrete patio before resurfacing

I am resurfacing a covered outdoor concrete patio. The original slab has a crack in it due to some heave. I am not particularly worried about this crack, however. The soil below is hard clay, and the ...
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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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Edge considerations on mosaic staircase

I'm renewing our old outdoor concrete staircase going to the garden. I've decided to install glass mosaic as surface finishing. I've got advice from the specialized shop regarding water-proofness of ...
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66 views

Preserving cracked concrete

I have a garage built with concrete blocks and the walls are surrounded on the outside by a layer of concrete rendering. The problem is that large cracks have built up in the rendering over time, ...
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2k views

How do I add veneer stone to an exterior painted wall?

I have an exterior painted wall and am interested in installing a stone veneer. I realize that I may have to install wire mesh to the areas but I'm wondering if there is a material that can be used to ...
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Did I properly grade the ground around my house? [closed]

I had some water issues in my basement recently. Taking a good look at all the possible causes I noticed the landscaping around the front my house was slopping in towards the house. So to fix this I ...
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Should I use a 6 mil poly moisture barrier for engineered hardwood floor installed over concrete slab-on-grade?

I am planning to install an engineered hardwood floor over a slab-on-grade subfloor. The slab is bone dry but I understand it's wise to install a moisture barrier anyway. My plan right now is to ...
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158 views

How do I repair this damage to my driveway?

After the brutal winter, my wife and I found several locations on our driveway where the concrete is crumbling. This is the worst of them: In the past, I have used self-leveling concrete caulk ...
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How to caulk vertical seams of concrete step risers?

I am recaulking some concrete steps, and the concrete/masonry caulk I bought says it's self leveling and for horizontal surfaces only. Are there caulks that are meant for concrete but will adhere ...
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How do I prepare this exterior concrete wall for paint?

I have a an exterior concrete wall that had some loose paint and started scraping away. The paint in some sections was so loose that I went all the way to the bare concrete, peeling away over 6 layers ...
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2k views

How can I paint/stain an interior concrete floor?

I have a very lovable aging bulldog who has peed on the wall-to-wall carpet enough that I'm ripping it out. It's over twenty years old anyway. The subfloor is a concrete slab. My goal is to make the ...
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978 views

How do I repair the bottom lip of a concrete slab?

(My issue is kind of like this question but more of a missing chunk than a thin crack.) I have a concrete patio in the front of my house that was fixed by a previous owner after a bottom chunk broke ...
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33 views

Worth it to add footing insulation if there's already a thermal break?

I've been considering insulating the outside perimeter footings of my 1972 ranch house in northern New Mexico. The slab-on-grade it's built on (that constitutes the subfloor) reaches a temperature ...
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How to prevent outdoor wall touching concrete fom getting moisture issues?

In my house the drywall is contact with the concrete. This is putting lot of moisture in the drywall and eventually it will start to rot. What is the best solution in this case to isolate the wall ...
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146 views

Cinder Blocks crumbling

As it is evident from the pictures, cinder blocks on the bottom of the wall are disintegrating. I have tried painting with special paint but it continues to happen. How do I replace them? Why is ...
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Renovating Crawlspace with Poured Concrete Floor

My newly-purchased 1950s home has a below-grade crawlspace with a poorly-poured concrete floor. Specifically, it is very coarse and looks like it was poured and spread with a garden rake. In some ...
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546 views

How do I level a concrete basement floor with a 1" dip?

I want to level my concrete basement floor, but on one end it slants down over 1" (over a 3'x15' run). Can I fill this area before using self-leveling compound, to save money, or what else could I ...
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options for new floor over concrete slab

I am in the middle of a basement renovation, roughly 1000 sq feet. The existing floor is some sort of vinyl sheet material over concrete slab. There is an existing floor drain in the current washing ...
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Should I be able to just peel tile off the wall by hand if it is installed right?

We hired a contractor to remodel our master bathroom. For the tile installation in the shower, he started with a float-cement backing. To show quick progress, he rushed through this step and the final ...
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381 views

Rebar cattle guard

Looking for a cattle guard that can be made from available supplies at local home depot. Needs to be able to support 32,000 lbs to meet HS-20 aka cement truck. Schedule 40 re-bar has a tensile ...
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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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Should I drill through the concrete garage wall to install a generator inlet switch inside?

I recently purchased a generator in the aftermath of the ice storms in the Northeast. I'm quit handy with the electrical wiring in my house and have no issue installing the proper circuit for the ...
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Help translate terminology relating to concrete floor construction

I just bought a house which had an extension done 12 years ago. I am about to do some work in this area and want to understand what has been done before. Below is a screen shot of the bits of the ...
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Can I install hardwood floors (not floating) on a concrete floor?

We have recently bought an old house, and the ground floor has a hard floor and is currently covered in tongue and groove laminate - which we hate. We'd like to put reclaimed floorboards down - is ...
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373 views

Is there a maximum thickness for shower float cement?

We are currently redoing our shower and would like to use float-cement to carry the tile. The wall behind it is a bit crooked, so, to get it nice and level, the float-cement would have to be a bit ...
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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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How can I stop water from coming in through a crack near the top of my bulkhead wall?

I have a bulkhead entrance to my basement. The bulkhead walls are mostly fine, with the exception being near the top. The top 6 or 8 inches or so of the walls are constructed of what appear to be ...
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91 views

Where to locate moisture barrier in engineered hardwood floor sandwich placed over insulation board?

I'm planning to install an engineered hardwood floor on a concrete slab that is very very cold. The climate is northern New Mexico. The slab perimeter is not insulated, and doing so is ...
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How can I fix an unlevel bathroom concrete floor?

In our very small bathroom (in a slab home) we have an uneven concrete floor. There is a ⅝" inch gap between the baseboard and vinyl that travels about 15½" along the baseboard. (The ...
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47 views

How to insulate slab that's been extended?

I bought a house built on a concrete slab on grade. It's an older house, so no part of the slab was insulated. At some point in the past, previous owners decided to pour concrete around the entire ...
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60 views

Slab foundation floor crack

I am purchasing a new construction home. The foundation, patio, & garage slabs were all poured at the same time, in mid-september. The home is not yet complete, but we have noticed a crack in the ...
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171 views

How to clean sand and brick dust off concrete paver blocks?

I have a floor of concrete paver blocks. There is a brown stain on them due to the presence of sand and bricks powder. I'm afraid of using more Hydrochloric acid because it didn't remove all the stain ...
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How do I fix badly peeling and hairline fractures on indoor concrete walls?

How do I paint and fix peeling paint and hairline fractures on my indoor concrete (cinder block) walls? The popcorn ceiling is a mess too.
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1answer
730 views

What should I use to fill drilled concrete holes that are not used anymore?

Just wanted to do some home repairs and found lots of old drilled holes. I've used putty to cover them up but it occurred to me that there would be air gaps for the holes as the putty cover over them ...
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2k views

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
11k 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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184 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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86 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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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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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 ...