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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How do I insulate a strip foundation from below?

While building a strip foundation (a concrete wall starting several feet below ground) I have to insulate it from moisture because otherwise moisture will get into the foundation and into the ...
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110 views

How can I edge concrete without an edge trowel?

How can I make a concrete floor (also using dry shake color hardener) with a proper edge, without using an edge trowel? In Brazil I cannot find an edge trowel anywhere, so I would like to know if ...
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1k views

how to repair large, uneven crack in concrete floor

I have a really long (about 20') uneven crack in my cement garage floor. Not only is it jagged, but the sides of the crack range from flat to about 1/2" high. I want to level the sides of the crack, ...
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56 views

Can I use a toggle bolt if there's no space behind the drywall?

While trying to install a 14lb metal shelf to the wall, I had learned from a previous installation mishap to upgrade from plastic anchors to something stronger. I picked up a few toggle bots (3/16" w ...
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23 views

Installing an 18kg (40lb) projector screen onto a concrete ceiling

I have a large projection screen that I need to install into a (seemingly) pretty stable concrete ceiling -- at least that's what I assume it is -- it sounds very solid when hit with a hammer, ...
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1answer
29 views

Best way to remove anchors from concrete?

The people we purchased our home from put up a wall in the 3 car garage between the 1st and 2nd space, but never finished it and I am now looking to remove the entire wall. There are several ...
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2answers
52 views

Which type of mortar or cement to set electrical box?

I have cut out two holes for 4", metal electrical boxes to be set in to the exterior walls of an old block and stucco garage. I need to secure the boxes by setting them in either concrete or mortar, ...
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2answers
50 views

Do I need an expansion gap around concrete laid inside a building

We are laying a concrete floor inside a room in an old stone building. Do we need to leave an expansion gap around the edge? The room is open at the front so we are not insulating or anything.
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Do I have to remove the old thinset before installing new tile?

I will be installing some new 12x12 tiles in two bathrooms approx 25 sq/ft each. When I pulled up the old tiles, there was no thin set that had made contact with them so the removal was very easy. ...
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2answers
94 views

Is the proposed solution to this masonry project okay?

We will going to build long interior, round(little bit) shaped staircase (similar to this) from concrete, and I needed to get instructions with physics that it will possible to make it without any ...
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2answers
79 views

How to indentify if the crack on plastered brickwalls is cosmetic or structural?

First up, I understand these kind of things are best left to experts' inspection and internet forums won't help much. I have called an engineer but until he arrives in a day or two, for my solace, I ...
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59 views

Can I put gypsum and paint finish on top of a concrete fast set repair mortar?

I have a finished concert pillar in my living room that I need to be patched and pained. The pillar has final gypsum and paint on top of concrete. Since the concrete is chipped off I need to use a ...
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1answer
27 views

How should I anchor a hand railing to sandstone steps?

I've got three exterior steps made of natural sandstone. They are 6 ft wide, and 10" thick. I need to anchor a metal handrailing to them. The railing has two feet: 1/4" metal plates with 3/8" holes ...
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35 views

How can I level a sagging concrete floor in a condo building?

I am purchasing a second floor condo that has a huge sag in a corner of one of the bedrooms. There is approximately a 1 foot drop in the corner. The issue has been resolved in the basement footings ...
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2answers
227 views

Can I tile over Linoleum felt paper on a concrete slab?

I have a contractor coming in to tile my home. My floor is a post tension concrete slab, home is only 4 yrs old. The contractor said they could just tile right over the linoleum, but after reading ...
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58 views

How can I fix these cracks in my concrete/plaster wall apartment in Paris?

I'm used to working on sheetrock in the U.S. but I now live in France. In my old apartment in Paris, the walls seem to be plaster but could be concrete. It is soft enough to make divots if I dig in my ...
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2answers
22 views

How do I remove adhesive from outdoor concrete deck that is textured?

I have an outdoor deck that had the old green carpet truf glued down. I removed it some time ago and want to remove the adhesive from the concrete, it has the brushed finish so the adhesive is in the ...
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1answer
50 views

What can I do about small pools of water on my garage floor?

I just moved into this house and I have discovered about 20 different size "water" marks. As I haven't parked my car in the garage - I would have noticed it sooner. But what can I do for this ...
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2answers
48 views

How should I install flooring over fresh concrete?

I have fresh concrete poured in my basement. Planing to use Metrofloor Engage Select vinyl plank for most of the floor. Contemplating ceramic tile for the bathroom if vinyl is not good enough for ...
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4answers
3k views

Can I float a tongue-and-grooved 1x12 pine floor over a concrete slab on grade?

I have bare concrete floor that was, until recently, covered with carpet. After recently seeing a friend of mine purchase raw pine, shape the tongue-and-groove himself, and seal it to achieve a ...
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3answers
104 views

What is the name of extremely porous concrete for water runoff solutions?

I have seen extremely porous concrete that water drains through very well. Narrow strips of this may be put across a driveway to limit excess water runoff. What is the name of extremely porous ...
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1answer
135 views

How big a hole do I have to drill in concrete to embed rebar in it?

I have a concrete patio that I'd like to use as the foundation for a CMU wall. I'd like the CMUs to be tied into the patio slab with rebar. I get that the gist is to drill a hole in the slab, put ...
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3answers
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Should I use self-leveling concrete or mortar to level a patched area of concrete prior to tiling it?

I had to repair cast iron pipe in the basement. This left me with a 2ft x 3ft hole in my tiled basement floor. We cut along the grout lines, so I just need to replace the tile and concrete. Well, ...
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1answer
34 views

How can I level a slab with floor drains?

I just had the slab in my new basement poured about 3 days ago. It turned out terrible. The entire floor is wavy and has up to 1/2 inch dips and bumps every 4 feet or so. I would like to resurface ...
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43 views

Will using concrete anchors in wall studs cause problems?

While installing a wall mount for a 48" TV, I realized I made a mistake. I drilled a ⅜ pilot hole in the wall stud and then installed the anchors provided with the mount that the lag bolts would be ...
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18 views

When pouring cement next to a home, how far below the mud line on a stucco home do you need to be to avoid water issues?

how far below the Mud line on a stucco home do you need to be to avoid water issues 1", 2", 3" or more
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37 views

How can I repair a cinder block wall around a sewer line?

After having replaced ~30' of 4" cast iron w PVC, I'm left with two holes in the cinderblock foundation. The holes are the height of 1 block and about 1/2 the width of a block. These leaves a pretty ...
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2answers
114 views

Can I use a traditional router bit on a small concrete slab? And if no what can I use?

Can I use a traditional router bit on a small concrete slab? And if no what can I use? I'm getting ready to make a coffee table. I know the trick where you put silicone in the corners to achieve a ...
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1answer
85 views

How to repair holes in concrete driveway?

I have a concrete driveway that is chipping. Is there any good options to fill these chipped areas?
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27 views

How should I prepare a concrete slab for plank porcelain tiles?

I have several questions about laying plank porcelain tile on a concrete slab. First do I need to get 100% of the glue from the concrete floor, there are small spots and patches here and there that ...
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3answers
3k views

How can I find places to nail/screw into walls of ICF (insulated concrete form) home?

The home I bought has exterior walls made of ICF (insulated concrete form). I don't know the brand or type, I just know that somehow the builders attached the drywall to the styrofoam/concrete. I'm ...
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4answers
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Should I set deck post footings deeply or use concrete footings?

I am building a deck. How about setting 6x6 p.t. posts down on a concrete footing at 4 feet deep (the frost line here) and fill with gravel and soil, and then let the posts run high for the railings? ...
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46 views

How can I transition from tile to stained concrete?

What are some good ways to transition from tile to stained concrete? We pulled up the carpet that was next to our tile and stained the floor instead of new carpet? I am looking for simple DIY ...
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5answers
16k views

How do I replace a wooden fence post that was set in concrete?

I need to replace a wooden fence post that was set into concrete. The post has snapped through rot at the base and the rot has set in so far that the post snapped about 2 inches beneath the surface. ...
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2answers
645 views

How do weather conditions affect pouring a concrete foundation?

I'd like to understand how weather conditions affect pouring a concrete foundation. Are there concerns about pouring a foundation during cold, snowy, rainy, or otherwise inclement weather? Is it ...
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1answer
93 views

How can I remove a parking block from my garage?

So, builders have this thing, for some reason, of installing cement parking blocks a few feet in front of the hot water heater in the garage. I've lived at plenty of places without those and managed ...
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6answers
11k views

What is the best way to remove and prevent leaf stains on concrete pavers?

We have a brand new paver stone walkway/patio. To my dismay, I noticed that their were leaf and acorn stains from the oak tree in the front yard. I've learned my lesson and I'm going to try to keep ...
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10answers
9k views

Would wrapping a wood fence post in plastic help protect it?

I'm geting ready to install a couple new wooden privacy fence gates on the sides of our house. One of my co-workers suggested to wrap the 4"x4" with plastic stretch wrap around the 2' part that will ...
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2answers
96 views

What options are available for improving the appearance of a concrete porch?

We have been looking to do something with our entrance patio flooring. We have some options to have it re-layered with concrete, but we would like something that is better looking and have ...
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3answers
533 views

How can I remove oil stains from a concrete floor?

I rented a home, and the garage floor is concrete. It looks like the previous owner had a small car that dripped more oil than it retained. It has been parked on multiple spots, so there are ...
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2answers
281 views

How to run electrical wire in concrete ceilng?

I live in a condo with popcorn (a.k.a California) ceilings. Next week I'm having them scraped, spackled, and painted smooth. I also want to hang a ceiling light fixture (the dining area desperately ...
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2answers
46 views

How to remove a brass concrete anchor?

I have brass anchors like below in the concrete deck around my pool. Today, when I was raising the inner screw to install the cover, the screw was being very difficult. Trying to raise it, the inner ...
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1answer
18 views

fix for tall concrete steps

I am buying a older home, the back porch steps are concrete and the top step that is just below the porch is extremely low is there a way to add a half step to avoid stepping down so long a distance?
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1answer
44 views

Use less water with concrete water reducer?

Reading up on concrete water reducer additives, it says it "reduces water by 5% - 10%". I assume this actually means that it reduces the required amount of water? I.e. I would mix in less water, ...
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2answers
54 views

How can I grind and smooth a concrete table top?

Hey guys so I just welded up a table and now I am going to make a table top. So here is the problem. I welded the table up and looks square but is off about 2 degrees here and there from heat warpage. ...
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4answers
151 views

What is the laziest way I can build a non-structural, non-aesthetic cinder block wall to contain compost?

I have a ton of brush that I used to burn, but I recently bought a chipper/shredder and want a spot to compost it along with grass clippings and greens. I also have 3 tons of CMUs that are just ...
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5answers
13k views

How to remove construction adhesive from concrete?

We removed a wooden dance floor that was glued to concrete with liquid nails. How do I remove the liquid nails that is all over the concrete floor? Has anyone had success with heat, mineral spirits ...
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40 views

How to fix concrete delamination

When I made some concrete flooring (my first time doing it) I finished the surface while there was still bleed water (I didn't know it better back then). Now 2 months later in a few areas there is ...
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2answers
875 views

What is the maintenance schedule for a concrete driveway?

I have a concrete driveway that I'd like to keep looking good, and in good working order. What needs to be done to maintain the driveway, and how often should it be done?
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31 views

How can I repair a crack in my foundation that is leaking?

We need help and we don't know who to contact and how to fix the problem. We have a crack in the foundation. Pavers on one side, crack where the siding of the house is and then water is coming from ...