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'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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1answer
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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2answers
40 views

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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1answer
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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1answer
618 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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1answer
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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41 views

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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1answer
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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1answer
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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1answer
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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1answer
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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2answers
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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2answers
52 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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3answers
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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1answer
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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1answer
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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2answers
55 views

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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0answers
21 views

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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1answer
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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2answers
45 views

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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2answers
128 views

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 ...
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1answer
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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7answers
4k views

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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2answers
84 views

How do i resurface my concrete patio?

I'm trying to figure out the most cost effective way to repair my concrete patio. It survived for about 30 years but recently a portion of it has begun spalling pretty bad, so bad you cant really sit ...
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1answer
28 views

Can concrete demo material be used as fill behind same project?

I am demolishing the old outdoor steps at the rear of my house, built circa 1955. I have discovered that they are not constructed on the ground surface, but sit upon a concrete block structure about 4 ...
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0answers
8 views

Putting footer with slab question [duplicate]

I wanted to put 4 footers where post will go for a pavilion. Should the footers be flush with the slab, or should I leave an inch for the slab to be poured on top . I'm going to have a 4 inch slab. ...
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1answer
54 views

Cracks in a newly constrcuted basement wall?

Pic 1 shows the newly constructed basement (Just 4 days) wall and It can clearly seen the crack across the wall (Not sure whether its crack or not but looks like) due to pouring concrete. I wonder ...
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49 views

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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1answer
28 views

How to prevent Epoxy from sagging/dripping

I have to anchor a bolt to concrete, but I can only find 2 component epoxy in "medium viscosity" around here (Brazil). I made a test setup to see how much might drip out and it is much more than i ...
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4answers
96 views

Concrete driveway in New England?

I need a new driveway and I was wondering if my only option is asphalt? I'm in Connecticut - does anyone know if I can have concrete driveway?
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1answer
34 views

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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0answers
22 views

how to lay concrete agaisnt wall over buiried foundation concrete

i want to lay concrete out of backyard along cinderblock wall over existing concrete foundation of backyard wall and gate. the existing foundation concrete is about 3 to 4 inches below the top of ...
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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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1answer
86 views

Can I avoid the slab and run the new PEX through walls and interstitial space?

… and many other questions. The following is the incoming water for my small 2-story townhouse. This picture was taken in my downstairs hall closet. This is what I have figured out so far: (1) is ...
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30 views

Patio wall: Footing necessary?

In the next 12-18 months, I am looking to get a patio put in, the thinking now is stamped concrete. I was thinking about adding a small wall around the perimeter like this ...
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0answers
28 views

deck post design

I am DIY building a deck and have a question about how to create the deck posts. I have dug holes 4 feet deep to compensate for the local frostline and plan to place a few inches of gravel at the ...
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1answer
52 views

What will happen to the concrete I tint with latex paint?

Considering following the advice on pinterest to replace 1/4 of the water in some concrete with latex house paint to tint it. Wondering if anyone has done this and knows if this will actually affect ...
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1answer
109 views

concrete slab up over vinyl siding

I tore out my front porch slab so I can waterproof the foundation. It was also sinking and since it has a column to support an overhang, that's a problem. My question is what should I do about where ...
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1answer
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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1answer
104 views

What is the minimum thickness a new top layer of concrete should be when poured over an existing concrete walkway?

Parts of a concrete walkway leading up to the front of the house have sunk down over the years. We want to add a layer of new concrete over the old concrete to raise it and make it more even. What is ...
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2answers
51 views

What product should I use to adhere pavers to an old concrete sidewalk?

We want to 'dress' up an old concrete sidewalk with pavers, but don't know if we should adhere them with mortar or some type of adhesive material. Which method would be the most durable in the long ...
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2answers
66 views

Should I move this support post in my basement?

I am trying to create a new bedroom in the basement. The first problem I hit is that there is this short concrete "wall" with a post coming out of it. Actually, the post is 3 2x4's joined together. ...
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1answer
65 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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2answers
93 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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1answer
72 views

Can I rest cement posts directly on the bedrock to build a structure for a large shed?

So I live in Canada, where winters are cold, and where there's not much soil above the bedrock. I would like to build a sturdy structure for an existing "shed" (in fact a 100-year old former stable or ...
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1answer
57 views

Is it possible to create a 4“x4” channel through concrete using acid?

I'm trying to figure out a possible way to eat through concrete without damage pex tubing inside (its a radiant heated slab). Is there any way using some type of acid (hydrofluoric, muriatic ) to eat ...
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1answer
52 views

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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0answers
59 views

How can I fix gaps at the bottom of concrete stairs?

How can I fix or skirt my concrete outdoor stairs? They are bolted on to the side of my house, and are left hanging with gaps all around at the the bottom. They are very sturdy and I don't really want ...
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1answer
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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0answers
45 views

How to install bathtub

I want to install a tub on basement bath where drain pipes are already installed and sticking out from concrete floor. I need to know how to raise the level of the tub from the floor in order to have ...