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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1answer
71 views

Why would cinder blocks be used instead of concrete for a foundation wall?

Saw this video about how to properly lay bricks and dang! It takes more skill and care than I thought. Then I saw a video about how foundations are poured into wooden casts from a big concrete truck ...
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4answers
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How realistic is lowering a concrete floor?

So first off, I love basements, its almost like a fetish. Ook.. so this guy is selling a basement in his building and its perfect(got good water, electricity, comms, location and cheap!) except for ...
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1answer
95 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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697 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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74 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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4answers
60 views

How can I pour a concrete floor over a particle board subfloor?

I want to pour concrete over the particle board subfloor in my living room. I like the loom of stained concrete. We have a crawl space underneath. My question is what product do I use? How thick so it ...
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3answers
273 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
50 views

How to repair garage floor concrete damage near apron?

I have a concrete garage floor that is cracking near the apron entry at the overhead door. I'd like to understand how to repair this problem and if it's a project I can handle as a DIY-savvy person ...
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1answer
304 views

How should I build a base floor for a large summerhouse?

Hi my question has 2 parts about piles and creating a subfloor. I want to install a 4.8x4.8m (~16'x16') summerhouse; its existing floor is 24mm (~1") floor boards on 75x50mm (~"2x3") floor posts. I ...
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29 views

Seamless construction joints on concrete floor

By construction joints I mean the joints between a batch of floor made one day and the new work in a following day. What is the proper way to get the most seamless joints when making finished concrete ...
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296 views

Is it possible to use molly bolts in concrete?

Is it possible to use molly bolts in concrete? They are generally described as for use in drywall. But I have a project that needs a hook or screw to be taken out from time to time, which is possible ...
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Can I hang a heavy weight from a concrete ceiling if I reinforce it with fiberglass?

I'm investigating the possibility of hanging a pull-up bar/ rock-climbing training board from the concrete ceiling in my apartment. The slab is 180mm (7inches) thick and the (static) weight which I ...
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2answers
33 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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2answers
122 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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2answers
66 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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54 views

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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2answers
100 views

How to remove flaking concrete sealer/paint

After my basement flooded and I removed the carpet I found the previous owner had sealed the floor but it's flaking up now and I want to remove it all. It's about 200 sqft so a wire brush by hand is ...
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55 views

Few questions about concrete/cement wall inside of the apartment and which screws to use

I live in an apartment building that has concrete/cement walls. I am still not sure which one it is. I included the image which has the wall in the background. I would like to know which screws i ...
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1answer
37 views

Wall frame weirdness during renovations

so I am renovating my garage and noticed something in 2 spots along the frame when ripping down the drywall. Here is a photo: The walls of the garage have stood for many many years without major ...
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2answers
2k 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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2answers
72 views

How do I fix sticky KILZ primer?

Has anyone ever had problems with an oil-based primer like KILZ being sticky or not drying correctly? We removed some vinyl tiles and mastic from a basement laundry room floor (concrete) using ...
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5answers
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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
76 views

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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1answer
32 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 do I reduce height of the curb on my driveway?

I have a concrete driveway (normal 2 car poured driveway) which is cut vertically (90 degrees) about 2.5 inches above the street. My father-in-law lives with us and has a powered wheelchair. The ...
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38 views

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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56 views

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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5answers
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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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1answer
29 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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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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2answers
3k views

How can I level concrete pavement for an above-ground pool?

I want to set up an above-ground pool (14' round) on my back yard. There is a relatively good place for it, where there are concrete slabs, however, there are two problems: The slabs are not level. ...
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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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Extending concrete Slab

I have a 10 x 10 slab (4 inches thick) that is already in my back yard in the corner. I bought a kit to build a 10 x 10 shed on it, and then realized that would put it right up to my fence. So my ...
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1answer
127 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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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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2answers
374 views

How to fix leak in ABS pipe going into cement

I discovered a leak in the drain pipe from my kitchen sink (and dishwasher) as it joins with the main drain in my basement floor. The leak is at a Y junction - the bottom of the Y is in the slab, one ...
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0answers
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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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7answers
8k 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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5answers
8k views

Why do builders say that wet concrete/mortar is not as strong?

I have been watching a few videos demonstrating the mixing of mortar and cement and a constant theme is that you must not have the mix too runny. I cannot fathom the reason... Does anyone care to ...
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2answers
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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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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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16k views

What water:cement:sand ratio gives the strongest mortar?

A typical mortar mix ratio is 1 cement : 3 sand. But what is the water ratio? Is it 0.5:1:3? Would a 0.5:1:2 ratio be a stronger mortar? Our next door neighbor has a dog that digs like a pro. The ...
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82 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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3answers
1k views

Basement subfloor, how exactly should I do it?

I am finishing a basement with my father and want to put in a subfloor. I know if there was ever enough water I would probably have to replace the floor anyways but want to give myself a couple inches ...
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2answers
84 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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0answers
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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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1answer
53 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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1answer
217 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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1answer
46 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 ...