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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What bit should I use to drill a two inch hole in a solid concrete wall?

I am planning to install a 1.5-inch conduit through a poured concrete wall. I am planning on drilling a two-inch hole to accommodate the size of the conduit body. I have been searching up and down, ...
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Gravel patches in concrete after sanding

We recently sanded our concrete in our garage to prepare for a reseal. These gravel patches came up randomly throughout the space. How do we fix this before resealing?
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When would you use “hot mud” or setting joint compound for leveling concrete?

To my surprise (or ignorance) the bag of 'hot mud' I bought specifically says it can be used for : leveling interior above grade concrete When would this be an appropriate choice, and does it have ...
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Can I tile over white paint?

Through out the house there is this white substance on the concrete that looks similar to white paint. There use to be carpet with the first owner of the house hence the brown glue, and then there was ...
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2answers
63 views

cracks in concrete walls in garage

I live in a high-rench type of house, where garage is on the lower level. The walls are concrete, and I found long crack running along the corner (see attached photo). The house is not in a wet/damp ...
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How to determine if drill is suitable for concrete?

I've seen two drills - one 600W the other 700W. Both 0-3000 rpm. But for 600W some guy said it can't make it with concrete, while for 700W reviews say that it does it. Both are hammer drills. I'm not ...
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43 views

What could cause a wet soil / moisture smell on concrete slab

I have a wet soil smell coming from the living room concrete slab. I had to remove all the tile in the leaving room. A remediation company came, they removed the drywall and dehumidified the place, ...
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1answer
38 views

Process and product to fix concrete slab surface issues prior to framing over them?

I have some issues with the slab that was poured for a garage, and I need to frame an interior wall over a bad area. The slab was poured with a bit too much water (5.5 slump) on a hot day in July. I ...
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Hit metal piece while drilling through condo concrete ceiling

I am trying to install wide rectangular light fixture. Something similar to this: https://www.amazon.ca/Feit-Rectangle-Ceiling-Lighting-Diffused/dp/B00Y86OROW I Hit a metal piece while drilling ...
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47 views

Filling crack in outside concrete path

Is there some DIY way I can fill up the cracks in the concrete path outside my home without having to go and hire professionals? See picture for how the crack looks like.
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Setting tack strip in concrete

I would like to have carpet installed in the bedroom of my basement apartment which now has a concrete floor. I don't trust the carpet guy with this part because he suggested cutting corners and just ...
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Should I level my basement floor if installing a subfloor?

I'd like to install a subfloor in my basement including that dimple stuff to allow moisture to dissipate. Currently, it has sheetrock walls and trim with painted concrete flooring, but that's it. A ...
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How to seal crevices in dry stack rock wall to prevent gopher activity?

I've recently had a retainer wall built in the landscape using the dry-stack method (see photos). Unfortunately, there has already been two occasions within past month of gopher activity behind the ...
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Is a rotary hammer with an impact energy of 2.7J suitable for household projects?

How can I find if an impact energy of 2.7 J is enough for chiseling concrete slab ? I am thinking about purchasing a Bosch GBH 240, which has an impact energy of 2.7J. Please let me know if this ...
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Advice on building a livable cabin floor on a concrete slab [duplicate]

I'm planning to build a 10 x 12 livable cabin based on a shed design. The cabin will rest on an existing concrete slab. Many shed designs recommend building the floor with equally spaced joists. ...
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Advice on building a livable cabin floor on a concrete slab with insulation and plywood

I'm planning to build a 10 x 12 living space based on a shed design. The shed will rest on an existing concrete slab therefore my plan is to lay 6 mil polyethethylene sheeting and foam board ...
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3answers
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Thicker epoxy rather than grinding concrete substrate to achieve smoothness

I am covering my basement apartment's concrete floors with epoxy. The concrete is very well done (self done, been several years, no cracks, reinforced, 2-3" thick). In order to test the epoxy, I ...
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Depth of hole when burying a 2 inch schedule 40 pole

How deep of a hole do I need, and how much concrete is needed for 21 foot tall 2 inch steel pipe schedule 40 pole that will be free standing? There will be a 19 foot tall antenna on top of it....
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Shower drain height for curbless tile shower

I want to do floor tiles for the shower and it must be curbless. It is the basement and has concrete foundation. Right now the drain I bought is sticking up 3" from the concrete floor: This is the ...
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Ideas on how to fix a void at the bottom edge of my concrete steps?

I was recently pulling weeds and I noticed that there is a hole at the bottom of my concrete stoop. I'm not quite sure on how to address it. I'm pretty handy so I'm sure that this can be tackled ...
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1answer
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Should you remove sonotubes when possible?

When you're using a sonotube in an open excavation, should you peel the sonotube off of your peirs before you backfill your hole? Or is it better to backfill, then only peel the sonotube off of what's ...
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How exactly do you set these post holders into concrete?

How should you set these bases into concrete? Do you push them all the way down? Or should you leave a gap underneath? If you leave a gap, how big a gap should you leave? It has drain holes on the ...
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1answer
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What to do with concrete/cement runoff from cleaning tools?

I'm completely new to working with cement/concrete. I can follow various guides online (I'm only looking at really simple loose-brick fixing for now). However, no guide makes clear how I should ...
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1answer
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Etching solution vs muriatic acid to prep concrete for epoxy

I'm thinking of ways to remove the concrete cream from my concrete in preparation for epoxy finish. Rather than grinding, I need to use chemicals. Initially was thinking muriatic acid but it's in a ...
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Waterproofing concrete from the ground?

We want to build a table with benches outside. For this, we have a concrete base with vertical rebars (40cm out of the ground). We want to build brick columns for the structure of the table/bench (...
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Scummy yellow liquid rising from quickcrete recap when resurfacing

I am resurfacing my concrete walkway with quickcrete recap. After or while I am spreading the mixture on the old surface a layer of scummy yellow liquid starts to rise to the top. I have had this ...
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2answers
108 views

How high should the tops of concrete piers be above grade?

I'm about to pour some footings for a covered deck. I'm going to be putting 6x6 posts on top of concrete piers, but before I cut my sauna tubes, how high should my pier project above grade? Is there a ...
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1answer
303 views

How to anchor brick vertically to concrete slab

Here's a concrete slab porch that was finished with paving bricks on top, and then matching pavers attached to the vertical front face with what appears to be some form of Liquid Nails. The pavers ...
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2answers
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Neutralizing concrete floor after cleaning cream with muriatic acid

I am prepping my concrete floors for epoxy. After removing whatever I can do mechanically with a grinder and cup brush, I was going to soak it in muriatic acid. I did something similar to my exposed ...
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5answers
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Pros and cons of plastic/gravel shed bases vs concrete base

I'm going to have a 10x8ft shed installed in my back garden. I'm wondering if I should pay someone to put in a concrete slab base or use one of those interlocking gravel filled bases you can get. I'...
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107 views

How to protect wood when applying concrete patch

I uncovered a situation where a couple header boards were embedded into the basement foundation. You can see in the photo they punched a hole in the foundation and ran the boards through it. I can't ...
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92 views

How can I extend a concrete step without repouring?

Two rooms in my house are connected with a set of concrete steps (one tread). As built, the ledge for the first step is inline with the wall framing. This means that when I add drywall the finished ...
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3answers
111 views

Can you “refresh” half-dried concrete just by mixing in water?

I mixed a wheelbarrow load of concrete (sand, cement, water) this morning, but before I could use most of it, I got called away and didn't get back until this evening, like 7-8 hours later. By now the ...
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Remove rotten mail post

I have to remove the rotten mail post and install a new one. The post was broken. I have to take it out first. The difficult thing is that the concrete around the post root. It's deep and hard. I ...
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1answer
207 views

How to Fill Gap Between Steel Beam and Concrete Pillar?

I have a Concrete Foundation Pillar that is 5/8th of an inch too short. What filler materials are appropriate when a steel I Beam will be resting on it? Can I use mortar, or is steel more appropriate?
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Using just cement to plug a narrow channel/hole

I know that ideal thing is to use concrete, a mix of cement and aggregate (usually sand and gravel/rocks. However I have a bag of cement that's not going to go to any use, and my aim is just to cover ...
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1answer
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how to best remove concrete splash from vinyl siding

When our contractor poured the concrete for sidewalks and handicap ramp, concrete splashed onto the vinyl siding. Is there a product or way to remove this more easily than hand-scrubbing? Pressure ...
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1answer
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What kind of garage flooring is this?

I like the flooring here in this picture but wonder what it is Is it some paint / stain on top of concrete? Because I can see the crack. Or is it some laminate plastic thing?
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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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How can I repair the degraded surface of a concrete slab and wall?

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? Here is another view, further back. =================== Found these in a ...
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1answer
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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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3answers
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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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1answer
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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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1answer
59 views

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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1answer
201 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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