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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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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What's the proper way to fill this hole?

Recently a dip formed in our flooring inside our sports performance training facility. We discovered that the concrete job there had a good number of stones in it, and I believe that it was that ...
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How do I remove adhesive from outdoor concrete deck that is textured?

I have an outdoor deck that had the old green carpet truf glued down. I removed it some time ago and want to remove the adhesive from the concrete, it has the brushed finish so the adhesive is in the ...
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20 views

How do I pour concrete in an existing garage?

My garage had extremely poor flooring. I've removed it and dug down 11". I plan to use a plate compactor on the dirt, add 4" of crushed rock, compact that, add 2" of sand, wet that, wait for it to dry ...
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466 views

How should I install flooring over fresh concrete?

I have fresh concrete poured in my basement. Planing to use Metrofloor Engage Select vinyl plank for most of the floor. Contemplating ceramic tile for the bathroom if vinyl is not good enough for ...
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48 views

Is there a way to find rebar in concrete walls?

I was wondering if there is a way to find the tie rods and also plastic electrical conduit in concrete walls. In Ecuador all walls are made from poured concrete and plastic conduit is run. But it all ...
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Adding rebar to deck footings and piers?

I've heard a few people mention adding rebar to deck footings and piers to make them stronger, but I haven't been able to find any details on how exactly to do this. Is it sufficient to just hammer ...
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614 views

How will concrete fill in?

So I am pouring some footings for a deck I am building and my current plan is to dig a hole that is 18" wide and 18" deep. I'm then going to suspend a sonotube about 6 inches above the bottom (using ...
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49 views

How long will Concrete bond together when poured over multiple days?

I've heard / read references to concrete being poured over 2+ days becoming "bonded" but I can't find any details to what the longest you can wait is. What is the longest you can wait between pours ...
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224 views

What type of subfloor should be used for Engineered hardwood flooring installed on grade concrete slab?

I would like to install engineered hardwood flooring over a concrete slab which is on grade. It is the first floor of the house, there is no basement and the house was built in the 1990's. I have seen ...
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How should I fill in pits in a concrete floor so I can install laminate?

I have these holes in the concrete floor, and I want to install laminate floor. What can I do to fill in these holes to get a nice level surface.
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27 views

What timber to use for formwork or shuttering concrete base

What type of timber would you use to construct the formwork (shuttering). There seems to be 4 different types that I could use. Planed Sawn Untreated Sawn Treated Carcassing My particular ...
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33 views

Installing a door threshold on concrete slab

I am trying to install the following door threshold on a concrete slab. The door leads outside and the old threshold was rotted from water penetration. The following pictures show the concrete ...
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138 views

Repainting my lanai floor

I'm painting my lanai floor and it has been painted last year but changing the color. Did one area and let it dry 24hr. and I can scratch it off/ I used the paint Home Depot sold me for concrete. What ...
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39 views

What type of contractor would I hire to level a concrete floor?

I am doing some renovations, and I've recently uncovered an original concrete floor that I would like to have leveled for carpet to be installed. It's currently sloped from level with the adjoining ...
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91 views

What type of concrete foundation do you pour for sand?

I have a piece of beach front land that is sand (sometimes wet), what kind of foundation do you pour for a home constructed on sand? What kind of considerations do you take in if its water front and ...
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65 views

filling in gaps in concrete patio

I have several 2" wide by 6' long spaces between the original patio slab and the newer slab that was poured after original construction of the house. The porch is covered so no moisture is getting ...
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215 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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What is the best way to fill a 3 inch gap under my concrete front porch?

I'm in need of some help with my concrete foundation. As I was leaving the house this morning I discovered two or three skunks crawling into a gap under my porch. The hole is on the bottom of the ...
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20 views

Increasing subfloor thickness under new shower pan

I ripped my old shower down to the studs and joists. The studs were rotten, the subfloor was rotten, and the top of the joists (in some places) were weak and rotten. I plan on replacing some studs ...
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52 views

How to stop water seaping inbetween concrete slabs

I have two slabs in a Home Office converted from a garage. The regular garage slab and another which is about 6 inch higher than the garage one. The lower one has a wall between the two except for a ...
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30 views

Attaching a deck ledger to the concrete pad of a detached garage

I am building a deck between my house and the garage. I will support the deck on one side with a ledger on the house and plan to support the other side with a ledger on the garage (with requisite ...
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114 views

Remove paint from concrete floor (indoors)

I'm trying to find a solution to prep my concrete floors (slab) for tile. A contractor I had hired to remodel my home did an outstanding painting job -- so well that he managed to cover most of my ...
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64 views

Should I stain or paint my blotchy concrete?

The house I just moved into has a lot of white spots all over the concrete. I want to stain the whole slab to get it looking fresh and nice. I had a couple contractors come out to help me resolve the ...
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What cement product should I use to fix a hole in my slab?

I was removing old thinset and self-leveling cement in an area in preparation to tile it when the 6" chisel and demo hammer I was using sunk in to a specific spot. I found that this specific spot had ...
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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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Can I change the color of the mortar in my brick wall?

We recently built our home and the mortar color between the bricks is dark gray, we did not pay attention to it and because of that the brick face is looking duller due to the standard gray mortar. ...
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Do they make a non-liquid concrete/mortar color additive?

I've been trying to find a cement additive to change the color of some mortar, but only seem to be able to find it in liquid form at my local big-box hardware store. I'm looking for a similar ...
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51 views

Mix a bag of 25KG self-leveling concrete with 6L of water?

I bought a 24L bucket to fit the mix of 25KG of self-leveling concrete (Thomsit DD+) and 6L of water. Now, visually inspecting the thing, I can't really tell if it's large enough to handle the amount. ...
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How do I fill in around waste pipes?

Broke the concrete in my basement to run new pipes for the basement bathroom. The plumber put sand under the pipes to support them at the correct angle. I asked him not to glue the vertical sections ...
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73 views

Installing hook on strange wall

I need to install some hooks on my wall, which I plan to use to perform elastic band exercises. Hence, I need to install these very well so that they will handle the stress properly. Situation is I ...
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26 views

What kind of precautions should I undertake to use epoxy-based paints?

I see on the market floor paints made from "1-part epoxy" or from "2-part epoxy". They are meant for concrete floors. Epoxy is reputed to be very harmful if misused during construction. Anecdotes ...
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122 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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Confused on ratios for Concrete mix to pour a 10X20X6 patio pad

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 ...
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28 views

How can I refinish a basement concrete floor?

The basement concrete floor pictured has traces of red paint, a beige mesh, the concrete itself, and a top blue-gray layer of paint. Does refinishing the floor require reapplying the red and the ...
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46 views

What finish should I use for concrete on stairs?

I want to remove the carpets on the stairs in my duplex. it is a concrete staircase. I think I would need to repair it and then I want to coat it and leave it bare. what would be a good coat to use? ...
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Can I use mortar to roughly level a basement floor for workshop?

I recently got my foundation repaired and am left with a very cracked and uneven concrete floor next to the wall. Along the very edge any leveling compound would be at least an inch deep. All I plan ...
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Where to seam concrete countertop?

I'm looking to do a concrete countertop and would like some advice on where to make the seams.I was thinking either where the red or the yellow lines are. Thanks, greg
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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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184 views

How to attach a monkey-bar/playground structure to the ground in my backyard?

I would like to build a monkey-bar/playground structure in my backyard. It's not your standard monkeybars, but I made a 3D visualization at staktrace.com/pub/structure.html if that helps. I'm planning ...
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95 views

Concrete porches pulling away from home and cracking

I have an 1940'sish home with old concrete porches (x3) they are cracking, chipping, and pulling away from the home. Would I be able to repair them? If not could I build a deck over them (wooden)? I ...
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Concrete foundation repair

My home was built in 1914 (Portland, Oregon). In 1948, the house was moved 200 feet to its current location. The 750 square foot house has a concrete basement with a concrete floor. The concrete ...
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How can I level a part of a concrete floor in preparation for installing a washing machine?

Whoever installed the existing washing machine in the basement was unable to extend one of the legs long enough to adjust for the slope in the concrete floor. So they took a piece of wood and stuck ...
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4answers
100 views

Can a concrete porch be poured against a stone wall?

I am installing concretes porches in the front and rear of my home to replace wooden decks. The front exterior wall is stone and the new porch would extend up over the stone wall at the bottom. ...
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How effective is elevated concrete for insulating moisture?

I am replacing a boiler in my basement and the contractor told me it will be better for the new boiler if he build an elevated concrete platform on which the new boiler will sit. He says this will ...
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42 views

Hole in concrete floor from floor anchor

I have a small hole in my basement floor from a leftover floor anchor similar to http://www.lowes.com/pd_79553-2191-50098___?productId=3044000. The anchor is now gone, and apparently over the years ...
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Pouring concrete, is it safe to add large rocks to increase volume?

Backround I'm going to pour some concrete to anchor a swing set. The base of the swing set that is being anchored is two 4x4s with a 2x4 footer crossed perpendicularly to the 4x4s. I have a bunch of ...
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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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container liner for easy cleaning when mixing concrete

Whether its a wheelbarrow or a 5 gallon bucket, is it okay to use a liner? For example, put liner in container, mix concrete, pour concrete, pull out liner, dispose liner, squeaky clean ...
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6in vs 4.5in of concrete for driveway

We need to get our cracked concrete driveway replaced. The damage seems to be a result of tree roots, and the tree has has been removed. Many people who we've spoken to say the concrete should be ...