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 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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96 views

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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230 views

Are there any advantages to using higher priced sealers?

I want to use a water based sealer on my pavers to bring out the color and also for some resistance against dirt and fading. I went to the store and saw sealers varying in price from about $11 per ...
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2answers
653 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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71 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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29 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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64 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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65 views

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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2answers
115 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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40 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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84 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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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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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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1answer
288 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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85 views

Can I add cement glue and sand into my concrete mix to repair my cenent garden statue?

I have a leopard concrete garden statue that was given to me by my neighbor that has a broken foot and log. I want to repair it and paint it. It also has been weather eroded so I need to recover it as ...
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160 views

How do I level a summerhouse concrete base that dips in the middle?

I laid a 4x3 metre concrete base for my summerhouse/office thing. The corners are all level and so the summerhouse sits fine, but it dips in between and so the load bearing battens aren't taking any ...
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24 views

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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52 views

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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73 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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0answers
80 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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30 views

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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129 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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87 views

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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75 views

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 ...
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336 views

How do I repair cracks in the concrete pillars supporting my patio roof?

I have two round concrete pillars that support my patio roof. I have noticed that they have cracks even though they are new. I suspect the filling of mortar and bricks inside those pillars was not ...
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214 views

How can I tell if I've got Cool Deck installed?

I have coping around my pool that I thought was Cool Deck. When I started researching "How to repair cool deck", I noticed I do not have the uneven (up and down) pattern) my coping is smooth and ...
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29 views

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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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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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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47 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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41 views

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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41 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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119 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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59 views

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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56 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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105 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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24 views

What adhesive should I use for Nicolock wall?

What adhesive should I use for Nicolock wall. It is a free standing decorative wall 24 inches high. Not a retaining wall. The first course is laid on a poured concrete patio.
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204 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 ...