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 product can I use to level an uneven garage floor?

I have an uneven garage floor that goes up to 1 inch deep from high to low level spots. I want to make the garage even. I was thinking of a self-leveling compound (watery). Which brand or type should ...
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How to patch concrete as invisibly as possibe?

I had a plumbing repair done this week that required them to jackhammer a small hole through a concrete porch in front of my house. It is small enough that I’ll probably attempt the patch myself, but ...
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How can I repair deteriorating concrete walls?

Our garage is about 80 years old and made of steel-reinforced concrete. The inspector deemed it structurally sound, but cosmetically the interior is a mess. The concrete has come loose (it is old ...
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How to drill to insert rebar into a large rock (5mx5mx5m)

I am pouring a reinforced concrete beam. It contains rebar. I would like to insert the rebar (horizontally) into this rock: What kind of drill and drill bit and to what depth should I drill to ...
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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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Resurface exposed aggregate concrete patio

Is it possible to resurface an exposed aggregate concrete patio? My current patio surface is about 20 years old, and the aggregate has deteriorated a bit and is pretty ugly looking and painful to walk ...
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Concrete “post footings” for concrete patio floor?

The typical way of doing a concrete patio floor is to excavate soil at least 9", pour & compact gravel, then pour concrete. I was wondering, what will happen if: Excavate post holes, past the ...
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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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What's the best ratio for sand-only concrete?

I'm making concrete countertops, so sand-only is the way to go to reduce voids in the forms. (I've done a half dozen samples). I've looked everywhere for mix ratios, but it's a weird request, and I ...
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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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How should I flatten (not level) a concrete subfloor?

In the final stages of finishing a room in our walk-out basement. This particular room has a long history, as it was originally a garage. Thus, it has a slight pitch from the back of the room ...
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Best way to support carport posts

I'm wondering if I can reinforce the posts in my carport as it seems one good earthquake could throw these off. Any thoughts on building a form out of wood and pouring concrete around and half-way up ...
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Should a post in a circular concrete form go through the bottom?

I am replacing a fence post that was in a circular 2-ft form. The old one had rotted where the concrete and post meet at the top - the next one will have the concrete above water level! But - I ...
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Can I sink existing concrete?

We got a house where it has a one foot strip of concrete that is 20 feet long besides a patio that is in good condition. On this 1'x20' strip there are two spots where the concrete has risen about ...
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22 views

Should I leave gap between my house's slab and a new one I'm laying outside in the garden?

I'm planning an outdoor kitchen. This will be a simple brick sided bench about 3 metres long and maybe 800 mm deep. I'm going to build it on a slab to support the weight and ensure a level surface. ...
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Will a few weeks of exposure to the weather damage cementboard?

I am getting ready to put Durock on my outdoor grill area. I am wrapping it with stone but it will be a few weeks before the stone comes in. Will the rain damage the cement board in any way or should ...
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Need advice on deck posts that will have concrete poured around them

I have a raised deck, attached to the side of my house on one side and held up by three posts on the other. Under each post is a small cement pad and the posts bracketed to those with a buffer piece ...
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What type of beam should be used over a split arch doorway?

I am building a building in Indonesia. It's using RC-frame construction. My builders don't have much expertise, nor do I. The basis for my building is three reinforced concrete pillars, 30cm * 30cm, ...
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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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Are hairline cracks in basement concrete floor a problem - no water coming in

I notice quite a few hairline crack in my basement concrete floor. I've lived here for 14 years and no water has come up through the cracks. The townhouse was built in 1999 (so it is not a new pour). ...
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Are smaller or larger pavers better for covering a concrete patio?

I have a large ( 16' x 16' ) thick slab concrete patio that is pouted in 8 x 8 blocks. it has significant spalling and some settling. The concrete is 6" thick and situation in such a way that tearing ...
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Damp concrete floor in bedroom

Had water overflow into bedroom and closet. New laminate floor removed. Concrete floor has glue strips from another flooring that is sticky in some places. Will thoroughly clean with as little water ...
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What to Look for in Professional Products for Vapor Sealing Concrete Slab

I'm planning to seal a concrete basement floor soon. While I haven't had any water problems, the basement has a smell to it which seems to be the smell of the soil/clay underneath the house. What's ...
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How to level out or grind down concrete basement floor?

I had a french drain installed in my basement and the top of its cement sits around 1/8" to 1/4" of an inch higher then the rest of my basement floor. I need to somehow level this out so I can put ...
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Should cement be placed under concrete slabs for driveways or is sand enough?

I am about to get my driveway full slabbed using normal concrete slabs like below (i will be using rectangle slabs as opposed to square). The builders that came to give me an estimate said it would ...
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Easiest way to replace mortar around door?

I have a stone house and some of the mortar around one of my door frames has completely eroded away, there are big gaps and I can now see the screws that once screwed into the mortar too hold the door ...
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What can I do to transition between concrete and drywall?

I am drywalling my unheated, partially-below grade exterior garage. A four-foot tall concrete wall runs along the parts of the garage that are below-grade. Above the concrete walls are 2x6 wood ...
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Should I set wood fence posts in quikrete with no supplemental water?

Setting wood fence post---I've heard to set wood fence posts using quikrete dry, allowing it get moisture from the ground. Is this a good idea?
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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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64 views

How Should I Fill In a Hole in Slab Around Floor Drain

I think I have a good idea about how to go about this, but wanted to throw it out here to make sure I don't wander down the wrong path. I recently installed a new floor drain. I broke up the ...
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339 views

How do I remove concrete that has splattered on my brick pavers?

We installed a brick patio, and splatter from wet-cutting the bricks ended up on the installed bricks. How do I clean it?
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What drill and screws should I use to attach security bar to a concrete wall

I have a few security bars to attach to my garage window. These are the bars: http://www.ebay.co.uk/itm/291320181452?euid=37bd934e70374116905fb2a20e9f7fad&cp=1 I have the Face Fix Brackets. The ...
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How can I pour a concrete floor/slab with two levels?

I am pouring a slab for a concrete floor for an 1800 sq foot house and would like the bathroom area to be about 3/8" lower than the rest so I can tile it and wind up with the floor and seams that are ...
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Load-Bearing (?) Cinder Blocks Half-Corroded Away

In preparation for patching and repairs, I knocked down all the loose material from an old, water-damaged wall. In the process, I discovered an area where a couple of the cinder blocks underneath the ...
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Ideas on how to hide sprinkler wires?

Just figured out how to wire sprinklers (yay!) but I've left myself with this pretty ugly situation. I was thinking of hiding the wire below the stone, but I'm not sure how to hold it. Can I drill ...
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What are my options for saving this building?

I have a small building on my property that is about 15ft by 10ft. The building sits on a slope that runs downhill sort of at an angle from one front corner to the opposite back corner. It sits on ...
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How do I repair a few broken concrete blocks in a stoop foundation?

I have a ranch home built in the 1960's. It has a full foundation under the front stoop. The stoop is a concrete slab. Settling over the years led to horizontal cracks about 36" below grade. In ...
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How can I install T molding on concrete subflooring?

I'm at the point where I want to install some T molding for the transition from our main room to the bedrooms. I just took a look at the directions and they only show screwing the track into the ...
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Relatively new concrete porch crack

About 6 months ago a contractor poured a concrete slab to serve as a porch. The slab rests directly on the ground and measures 25' by 4' and is 4" thick. The slab has remesh under it, no gravel, but ...
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Fast Setting Concrete vs Regular?

Other than the ~1 hour set time of the fast setting stuff, are there any other pros or cons to it? We're looking at putting in about 45 fence posts or so and I'm running costs. The regular 50lb ...
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Adding a layer of concrete and tiles in the garage

I just wanted to get opinions on my plans to fix the somewhat sunken slab in our garage. We bought the house two years and (it's about 50 years old) and I have been monitoring the slab since day 1. ...
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Flattening Concrete for Dricore Product Suggestion

I am in the process of laying DRIcore panels in my basement. The ultimate plan is to lay laminate (Pergo) floor once we reach the finish stages. I have a few small areas where the concrete dips ...
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1answer
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Creating a concrete mix with smooth texture

I would like to create a small concrete table(~.5m diameter). To do so, I would like to create a concrete mix with smooth texture, similar to Quikrete. Since this product is not available where I live,...
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How to support the side of concrete steps?

Last spring, we decided to remove a concrete walkway (and much of the soil underneath it) behind our house and replace it with either a pea gravel or decomposed granite patio with boxwoods and a fire ...
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1answer
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What is the best way to protect a burnished concrete floor during construction?

I am doing a new build. The floor is burnished concrete done by High Trowel finish during concrete pour. I need to protect the floor afterwards. What is the best way to protect a burnished concrete ...
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2answers
158 views

What is the proper concrete ingredient ratio for a patio?

I am pouring a 10X20X6 patio pad. It has been 15 years since I mixed a mass amount of concrete and the cement that I got is a little vague on the instructions. What is the ratio for cement:sand:...
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Ceramic tile on concrete with shrinkage cracks

I am interested in the opinions of any experienced tile-setters here as to ceramic tile or stone laid on concrete regarding crack isolation. I am building a new house with lightweight concrete poured ...
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Replacing a crawl space with concrete slab

I have a 1970 rental house that is prone to flooding the crawlspace approximately 1 week a year. To clarify, the whole section of land, yard, and streets are under a foot or more of water, due to ...
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putting concrete footer with slab

I am going to install a pavilion on a concrete slab. I was wondering, if I install 4 ft concrete footers, should the top of the column be flush with the top of the slab to be poured, or the column be ...
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Raised Concrete Patio Drainage

I recently purchased this house which has a raised concrete patio in the rear that has a large depression in the middle probably 4' wide by 6' long. You can see the cracks in the concrete where the ...