Questions tagged [concrete]

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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2answers
36 views

Sand and refinish uneven concrete

My patio concrete shows multiple pieces put together in the past I am thinking of renting a concrete grinder 10” and make it even. Then either paint or put something on top to cover. I may fill the ...
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Fixing concrete

I've never worked with concrete. Is there an easy way for a concrete newbie to repair this wall? OR- How do I fix it? EDIT: Here is another view, further back.
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How I prep a concrete garage floor for painting?

Is there any special considerations for painting a concrete garage floor as opposed to any other concrete surface? I'm thinking in terms of foot and tire traffic.
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tile over concrete slab

My condo has a concrete slab. We put down engineered wood flooring. There has been some flooding in neighboring condos, which has damaged the flooring. Does anyone have a suggestion for flooring ...
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How can I put in a screw in a concrete ceiling without power tools?

I want to hang my plant but my ceiling is concrete. I don't have a drill. I have a hammer and screwdriver.
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tub overfowed, didn't realize floor and pad are wet. pulled up thought was dry. when i cover with pad and carpet gets wet

I have been drying with space heater and dehumidifier,. however if i put carpet back it gets saturated. I am drying for several days, then cover with carpet, after 5 days carpet is dripping wet again....
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Will a PVC pipe crack in concrete?

If a plastic PVC pipe is totally covered with cement? Does a minor crack/s in the concrete will also crack PVC pipe or damage it? I mean cracks such as due to very minor seismic movements?
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Laying Stone on a unlevel concrete surface

first and foremost thanks for the help :) I am in the process of redoing my porch and I have hit a road bump along the way. I am planning on laying real thick stone (as seen here) on the porch floor. ...
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Materials for building inexpensive light-weight large planter?

I've wanted to build a few large planters for a while now, and I've considered using concrete, wood, etc. I don't know what other cheap material to use. Initially, I wanted to make them out of pre-...
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Material lighter than concrete for planters?

I'm trying to build several 24"x 24" square planters with each wall 1.5" thick, similar to the following picture. The issue is that each one of these planters will weigh at least 200 pounds (without ...
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48 views

Distance between edge of concrete for anchor bolts?

In residential construction, placing anchor (j bolts) for the sill plate, I have always read that it's best to stay towards the outside edge of the foundation and face the J portion towards the ...
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Is this a properly done aggregate courtyard

A restoration company came out to repair our aggregate courtyard that they damaged while working on our home at their cost (which they should). We also had them extend the courtyard up to the front ...
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Do these plastic molds exist?

I want to make a few concrete pavers, so I started looking for a few tutorials, and found this youtube video. In the tutorial, he uses a plastic mold where he pours the concrete. Something like this: ...
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Screw doesn't grip

I have just purchased 3/16 x 2-3/4" philips head tapcons and the recommended 5/32" drill bit. I drilled the holes using hammer-drill with ease and plenty deep as recommended. Attempting to drive the ...
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Levelling exterior painted concrete floor

Want to repaint concrete patio, paint is in good shape, no peeling, but have some minor low spots that pool
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Rebar required for 24 ft tall 4x4 square steel tube 1/4 inch thickness, 4ft deep in a concrete base, horizontal load of up to 1,000 lbs at the top

I am installing a 24 ft 4x4 square quarter inch thick steel tube 4 ft into the ground with a concrete base of 28 inch diameter and just over 48 inches deep, so 20 ft of the post is above the ground. ...
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Lard as release agent?

So I’m learning how to make concrete pavers with this youtube video. He mentions that he uses lard as a release agent, so he brushes that into the mold. He also suggests cooking oil or motor oil for ...
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How to repair a hole in exterior concrete foundation

We have had this hole in our exterior foundation for a few years. The way we discovered it was that water was leaking into our basement finished room, and when I looked outside, I discovered this hole ...
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Repointing stone basement

I am looking into which cement to use to repoint our old house (built ~1900) stone basement. I found conflicting advice, some suggesting type N or type S is fine, but some sources suggest that ...
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Crawlspace Post to beam lumber grade

Recently we replaced some of the rotten and cracked true size 4 in x 6 in. posts under the house in crawlspace. The old posts were resting on concrete pads 24 in. x 24 in. and supporting a true size ...
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above ground pole support for sail cloth

I need to create above ground, mobile "footings" for metal poles to hold sail cloth. I was thinking of a cardboard tubing, filled with concrete to hold a sleeve to insert the pole into that will hold ...
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How would I remove a concrete shelf with possible reinforcements

I've had a brick-walled cupboard removed from my kitchen, but the concrete shelf that was in it had to be left because of the gas piping around it. The piping will be removed for 2 days soon while a ...
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83 views

How do I calculate the concrete needed for a fence post?

I'm trying to determine how much concrete I'll need to set fence posts for a 6ft tall privacy fence. From what I've read these are the parameters I'll be using for each post hole. Post: 4in x 4in x ...
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54 views

Can the vapor barrier between a dry floating concrete slab and linoleum flooring be foregone?

I have a two year old house that sits on an 8" concrete floating slab. The slab is insulated below and around the side. The floors in the house are unfinished. That is, the concrete slab is ...
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How much water for mixing with concrete?

I bought a bag of quikrete mason mix for creating some planters from molds. The wood panel molds look something like this, but the spacing is a bit narrower and they're smaller: Since I'll be pouring ...
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How do I build a fence with zero experience?

I've never built a fence or have never done any outdoor construction. I'm pretty handy and do most of my interior maintenance. I have a total of 780 feet where I need to put up a fence. I'm still ...
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What is this material between our concrete and bricks (lining our pool)?

The material lines our pool between the brick (edge) and the concrete. This material is only near our pool. It feels rubbery and bendable. And The material is over 30 years old is has been breaking ...
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Can I use concrete screws to mount storage racks through drywall into wall studs?

I mistakenly brought concrete screws to hang my storage racks in the garage. Well, turns out my walls are drywall on wood, and not concrete. I don't supposed the concrete screws will work in drywall ...
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How to bind pebbles in-between pavers?

I have roughly 700 square feet of pebbles and pavers in my back yard, and the issue I'm having is that when I step on the pebbles, they move all over the place. I'd like to apply some kind of binding ...
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97 views

How can I raise a concrete bridge footing two inches?

I have two existing concrete footers from the previous bridge that are not leveled. I thought about using hydraulic cement to level the top of it. The left side needs to be about 2 inches higher ...
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How serious is this spalling?

Spalling is occurring on the corner of the top of the first story. I'm curious as to how serious this is.
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Extend/splice 12/2 romex along concrete finished wall

I would like to extend some wiring for a counter outlet that is running behind a refrigerator, which currently encased in a metal "cable concealer" raceway. Note: wiring is in a raceway because most ...
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70 views

What is the correct tool/method for digging out existing concrete holes for fence posts

My garden needs a new fence as well as two new fence posts. There is an existing concrete base along the boundary which is already securing three posts and has holes where two posts snapped in the ...
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Tile uneven fireplace hearth concrete

I remodel my fireplace and the hearth was poured concrete over: I plan to install tiles over the 3 sides However the surface is not even and not 90 degree You can see the bumps from previous ...
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What to use so concrete doesn't stick to plastic bucket?

I'll be using regular plastic buckets to make some concrete planters, something like this. My goal is to reuse the buckets. The problem is that she sprayed each bucket (generously) with canola oil ...
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74 views

What to use as a screed edge along a brick wall?

I'm planning to pour a concrete slab along a brick wall and need to plan how I will screed it smooth. Three sides of the rectangular slab will have a removable wooden form, but the fourth side is ...
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Need More Water in Quikrete than Recommended

I am pouring a series of concrete slabs for a patio and I’m using standard 80lb Quikrete bags (https://www.homedepot.com/p/100318511). The directions recommend 3qts of water per bag and a max of 4....
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37 views

Are phosphate floor screws suitable for subfloor which will be covered in thinset and cement board?

I am installing hardiebacker concrete board with thinset to a plywood subfloor. I am putting down the new subfloor and want to be sure the screws that I use to secure the plywood to the joists will ...
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What is the best proportion mix cement, sand and aggregate to use in mosaics?

I am pouring mosaic concrete stepping stones to be placed in a city sidewalk. The mosaic will go face down into a form and the concrete poured from the back. I have been having problems with my test ...
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79 views

Raised Concrete patio construction

I'm concerned about the way my raised concrete patio is being constructed and thought I'd do a sanity check here. 14x16 raised screened in porch. Footers, concrete block and brick foundation with ...
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about preparing concrete slab for leveling

I am preparing concrete slab surface for leveling it. I removed the tiles first, and grinded away the remaining thinset mostly nearby the boundary of tiles. Here is the picture of the current ...
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Reducing moisture from semi-finished basement concrete floor

I'm looking for advice for a good way to reduce moisture seepage through my basement concrete floor. My research has turned up several promising approaches: Surface-only treatments Specialty paints ...
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Asphalt Impregnated Board as Isolation Joint

I am extending a concrete patio in my backyard and have decided to connect the new slab to the existing slab, but I am using asphalt impregnated boards to form an isolation joint between the new slab ...
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Wire mesh or rebar

I am extending my back patio and am planning on reinforcing the new slab. I live in South Louisiana. Should I use wire mesh or rebar for this?
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How to extend a concrete patio

I am trying to extend my back patio like this Eventually, I want to extend the full 18 feet, but for now I am planning to just do the 5 feet by 5.5 feet section in blue. This section will be attached ...
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Grout and/or thinset flushed in septic system

All. My contractor is awful. If we weren't almost done with the project, I would kick him off my property and sue him. Anyway, it appears that he dumped excess thinset or grout into my basement ...
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4answers
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Is it a problem to leave a sprinkler line through concrete shed footing?

I'm in the process of getting an attached shed built in my house (due to HOA restrictions). They seem to be very competent. The contractor is subcontracting the concrete foundation pouring. They have ...
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1answer
67 views

How to repair thin concrete deck cover

I recently bought a house with a deck that has what appears to be a thin layer of concrete over wire mesh over wooden (2x6 or similar) beams. A friend mentioned that he figures the concrete was not ...
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Would a concrete ramp added to an existing slab be less durable?

To remediate a situation my concrete company caused by changing the layout without consulting me, they propose to add a ramp partially on an existing (though new ~10 days) slab. I'm worried that it ...
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What product should I use to reseal an aggregate patio?

The surface was never really "smooth", but metal patio furniture with plastic gliders on its feet used to move easily across it. Now, the surface is rougher and pebbles are loose and get washed or ...