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 much concrete is required to hold 125 lbs/sqft permanently?

I have an garage with asphalt floor and concrete footings. I plan to put a 500 lb safe in the corner, partially on the footing. That's about 125 lbs per square foot including contents, permanently. ...
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25 views

What should I do about cracks in the cement pan for a roll-in shower?

We are installing a roll-in shower. We poured the floor and after 2 days it has several cracks in it. I am not sure if they are all the way through. Is there any way to fix this or do we have to ...
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How long will stored powder charges last?

I finished a basement well over a decade ago, and had leftover concrete nails and powder charges for my powder actuated nail gun. I'm going to be driving a few nails into concrete for a tack strip, ...
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repairing concrete damaged by anchors

I was trying to mount something to a concrete wall and completely botched it. I had 4 drop-in anchors, so I took a hammer drill and some bits that were, by eye, pretty close to the diameter of the ...
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19 views

Large gap between foundation wall and patio

What is the best way to full this gap which is between the foundation wall and front patio?
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132 views

Gutted a basement and found a window, what should I do?

I recently gutted my basement in an early 1900s home that was finished in the mid-80s, and discovered a window! This window is directly under my front door, hidden by a deck that I've never really ...
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22 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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34 views

How to mix concrete cement

How do i make sure i have the right air in concrete cement if i'm mixing at home.So that the concrete is stronger and won't crack in cold winters. I'm pouring a small walk way about a meter of ...
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38 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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Extremely porous concrete to act as water drain?

Want to create a six to twelve inch wide porous concrete strip about thirty feet long in our backyard over a drain pipe. Normal concrete is porous but the concrete i want is extremely porous. So ...
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How can I get concrete out of ground?

I had a huge play structure when the kids were little that I donated to a church camp. When they picked it up they just cut the brackets at the ground and left the concrete and 6 inch U brackets ...
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Repairing/patching concrete foundation of house

What's the best (or maybe easiest and most affordable would be more accurate) route to patch the concrete of our house foundation? It's kind of crumbling in places and needs a facelift. Ideas/options? ...
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How to install 4'x9' fiber concrete siding to replace wood siding

I acquired 4x9 panels of fiber concrete siding. I want to replace 20 year old 4x9 sheets of wood siding. I read you need good backing under the concrete panels. What is the best practice for ...
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69 views

How long should it take concrete to fully cure?

I have just had a backflow valve installed in the basement. The man had to chip away some of the concrete, he then put new cement down. He also had to do some work outside around the foundation, he ...
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76 views

How to improve garage floor look and color?

Here is a image of my garage floor. Hi-Res Link This is after a professional high pressure water cleaning contractor that used degreaser and bicarb soda chemicals to try to rid the floor of oil ...
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60 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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19 views

How can I prevent condensation under vapor barrier on a 1st floor room with flooring?

We bought last year an apartment of the 1st floor. The building has garages and utility rooms right under our level and the two bedrooms face north. One of the bedrooms has actually an external wall ...
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73 views

How can I patch a concrete porch that separated from the house?

I have a concrete slab as a front porch on a property I recently acquired. This was put in when the house was built. At some point since it was put in, front sunk/settled and the slab separated ...
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36 views

basement bathroom flooring options in old 1929 house

I have an old house built in 1929 in Minneapolis, Mn. I need to replace water damaged rotted basement bathroom floor(toilet and shower leak another story). Current floor is 2" by 4" sleepers set on ...
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117 views

How wide does a 6x6 concrete post footing needs to be?

Need to attach 6x6x8 posts for a free-standing pergola - I'll use Strong-Tie anchors attached to the concrete footing. The hole for the footing will reach well below the freezing line, but how wide ...
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43 views

Brick pillars gone now what?

I have a back concrete patio in pretty good shape. Surrounding it on 2 sides are concrete pads (| is one pad and the other is -). These two pads are about 1 foot a piece wide. The X's are the brick ...
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34 views

How do I seal an existing concrete floor before patching it?

We are patching an old concrete slab and we are having a problem with the glue or concrete seeping through small cracks onto the floor below. Is there something I can seal it with before we pour?
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92 views

Stabilizing a gravel driveway with massive holes and steep inclination

I have inherited a 270 feet long driveway along a steep hill. It is part gravel/stone, and part concrete. It is in very bad condition. Every winter, rain threatens to wash away parts of it. Driving ...
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148 views

Should I set wooden porch pillars into, or on to concrete footings?

I'm building a wooden porch on the front of my house. I have six 4" wooden pillars supporting the structure. It's light, doesn't contain concrete, roof tiles, etc, and is made entirely of wood. I'm ...
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57 views

What can I do about 2x4 wood expansion joints that are above the surface of the concrete?

I have a lot of concrete in my yard that has several 2x4 6-10 foot wood expansions. The 2x4's are now between a 1/2" and a full inch above my concrete. What can I do to fix this? I thought about a ...
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116 views

How long can a concrete pool stay without the water?

After draining the pool, how long can it stay empty. In other words, how much time do I have to work on it, before it is not safe? I heard opinions that concrete pools can't stay long without the ...
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Should a concrete pool look like this after an acid wash?

I'd like to redo after the contractor who did an acid wash of my pool: But before I start, I'd like to understand (since I have never seen the pool acid washed before): is that what "the product" ...
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81 views

What does this concrete pool surface look like?

This is a surface of a concrete pool after an acid wash. I first thought it is plaster covered with paint, but then, by the feel and look of it, it does not seem to be paint. Hence I have several ...
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66 views

How do I smooth a concrete pool surface after an acid wash?

After an acid wash, the surface of the pool is very rough. What should I do to smooth it out?
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54 views

What is the recommended thinset when tiling over concrete?

I am about to start tiling a concrete area of my home about 220 sq feet. I was wondering if there is any specific type of thinset I should be using for a concrete surface. The tiles will be 12x12" ...
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58 views

Abutting brick or paver stones to foundation

I have a little area between our deck and garage that would be perfect for the grill. Right now it is dirt, with nothing but dandelions thriving. +---HOUSE---------- | ...
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71 views

Is this vertical gap in the concrete block foundation something to worry about?

I'm looking at a home that has a vertical gap or crack running the height of the exposed concrete block foundation. The crack is near the center of the home, about a foot to the right of the concrete ...
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42 views

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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laying a brick patio in extreme temperature setting

The small town where I live gets below freezing in winter and above 100º F in summer. I need to know which mortar joint width and ratio is best for laying a brick patio myself. As far as I know, ...
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185 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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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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1answer
109 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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222 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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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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155 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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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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55 views

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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1answer
45 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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104 views

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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35 views

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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94 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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1answer
50 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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1answer
26 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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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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83 views

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 ...