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 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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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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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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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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216 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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35 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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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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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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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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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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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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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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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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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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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 ...
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Would wrapping a wood fence post in plastic help protect it?

I'm geting ready to install a couple new wooden privacy fence gates on the sides of our house. One of my co-workers suggested to wrap the 4"x4" with plastic stretch wrap around the 2' part that will ...
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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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Small Concrete Paver patio under BBQ

I have a BBQ that's currently sitting on a not so level grassy area. I'd like to create a very small base for the grill with two 2ft by 2ft concrete pavers so I have a level base, but I don't know how ...
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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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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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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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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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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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How can I pour a concrete pad with a circular hole in it?

Essentially, I'd like to put down a concrete pad for a patio, but leave a couple of circular areas within that patio unpaved (for planting shrubs). I'm familiar with the techniques for using ...
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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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How to remove construction adhesive from concrete?

We removed a wooden dance floor that was glued to concrete with liquid nails. How do I remove the liquid nails that is all over the concrete floor? Has anyone had success with heat, mineral spirits ...
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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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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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How do weather conditions affect pouring a concrete foundation?

I'd like to understand how weather conditions affect pouring a concrete foundation. Are there concerns about pouring a foundation during cold, snowy, rainy, or otherwise inclement weather? Is it ...
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Can I mix latex paint into concrete

would like to color concrete mix can I use outdoor latex paint to mix in with the concrete?
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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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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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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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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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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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How long can I store a bag of Quikrete?

I had planned to find a nook in the low-humidity house in which to shove it, but it would be interesting to know how long the bag will keep in various humidities. The main question is: How long can I ...
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242 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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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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76 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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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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What kind of paint should be used on an outdoor concrete walkway?

I have an outdoor walkway that was freshly painted just before I bought my house two years ago. Two winters have worn down the paint and now it needs another coat or the exposed concrete will crumble. ...
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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 ...