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 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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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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33 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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35 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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103 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
31 views

concrete on stairs - what finish to use

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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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
62 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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25 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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7 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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49 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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30 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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25 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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66 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
24 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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19 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
61 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
65 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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23 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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25 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
48 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
57 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
45 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
80 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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44 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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57 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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44 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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54 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
59 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
55 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
38 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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47 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
70 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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36 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 ...
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3answers
134 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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35 views

Can I pin 1/4" wonderboard backerboard to the whole concrete blocks wall in bathroom?

The bathroom is in the condo, high-rising concrete building. The two side walls are diamond wire mesh with applied above the cement (grey) and lime (plaster) layers , total depth 3/4". The frontal ...
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1answer
74 views

Deck Footing capacity with BigFoot base

I'm planning a new deck (completely replacing and enlarging an existing deck). The deck will be 25'x15' w/25 ft being attached to the house. I'm trying to determine what footings are required. ...
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1answer
52 views

A-Frame for a hoist?

I need to move a heavy-ish piece of concrete, a part of a garden sculpture, weighing about 300lbs, to about chest height. I'd like a hoist, but don't know the equipment I'd need to assemble an ...
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22 views

Replacing Kool decking

I want to replace my cracked and bumpy Kool deck. What do I need to do to take it completely off my pool deck?
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41 views

Insulating the concrete columns

we are building a house with bricks and it has columns every 3 meters. Wall is going to be insulated with foam blocks and I am trying to figure out how to insulate the columns. Will putting a 2 - 3 mm ...
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1answer
48 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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3answers
121 views

How to put up a very small barrier on concrete to stop water running past it

I have a a concrete driveway that leads to the garage with a very slight slope towards the garage. When it really rains hard, the water comes down into the garage. I don't want a very high barrier, ...
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1answer
46 views

concrete drive heaves where it meets garage floor

This past winter, my concrete driveway heaved 1.5" above where it meets the garage floor. It is three years old. Also, we dug along the sides of the drive to try to guage if a 4" slab was actually ...
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2answers
109 views

how can I check to see if a 4" slab of concrete was actually poured?

I had a driveway poured three years ago. After a crack in the walkway appeared and two more developed in the driveway itself, my husband began to get suspicious that I wasn't given a 4" slab. If we ...
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1answer
115 views

How tall can I go above ground with a concrete footing?

I am building a 20' x 20' foot deck with a 10' x 12' Pavilion in one corner, away from the house.I need the concrete footings for the pavilion to be flush or just above the surface of the deck. There ...
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1answer
148 views

What is this crystal on my concrete?

My concrete has an old unknown spill which appears in the newly warm moist weather to be forming crystals or hairs. It doesn't have direct water on it, and hasn't been damp recently. What is the ...
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1answer
44 views

How do I shim a steel structure?

I need to affix my steel stringers to a concrete beam. Since the beam was poorly executed, it is not plumb. On this piece I will weld some 5 mm thick plate on the backing, that will have holes for ...
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78 views

Do I need a header for an egress window?

I am in the process of finishing a bedroom in my basement. I need to add a window to the room and the selected wall is poured concrete. I need to know if I have to add a header above the window in the ...
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1answer
31 views

Damp slab in my living room

I live in FL and have a damp area on my slab in my living room in front of my front bay window which does not have a gutter. As a result I have a musty smell in my house. I bought some UGL DRYLOK ...
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1answer
60 views

How can I remove 6-8 inches of concrete from a wooden floor?

I have inherited a 143 year old building. Somewhere in the past someone poured 6 to 8 inches of concrete over top the wood bathroom floor. I really want the weight out of the building. Any ideas on ...