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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11
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5answers
2k views

Masonry bits dulling after 3-4 holes

I'm using an 18v makita hammer drill with a 3/16" Bosch blue granite turbo concrete bit to drill 2" deep holes into concrete-filled cinder blocks. With a fresh bit, it takes about 15 seconds to drill ...
9
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5answers
3k views

Rotating a concrete slab?

Is it possible to use a hydraulic bottle jack or similar to rotate a 10 x 12' x 6" a few degrees or about 5 inches? I have a recent pour not quite in position. 3/8" rebar throughout in a 6 x 6 grid ...
2
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2answers
64 views

Can I cut into concrete floor in kitchen?

I need to run a gas line for a new stove. No room in the attic so need a 3x3 inch, estimated 12 foot trench in kitchen concrete floor. Wondering if anyone can offer advice. I'm just concerned about ...
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0answers
23 views

Installing Fake boxwood on concrete vinyl siding

We are trying to add boxwood on what I believe is concrete siding and I believe the only way to do so is by making a frame on the back wall that will have to be drilled into wall. Can I drill in the ...
21
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5answers
9k views

Make a hole deeper than the drill bit is long

The longest drill bit I have is 23.62 inches and apparently the thickness of the concrete I need to penetrate is 27.5 inches. I don't wish to buy another drill bit, is there a smart solution? The ...
1
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1answer
24 views

Sealing coarse concrete rooftop?

I live in an apartment and I would like to seal a section of our rooftop with small leaks where water puddles (depth of puddle is negligible). The rooftop is "rough" concrete in the sense that it ...
4
votes
2answers
158 views

Weird orange rust spots appearing in holes on freshly painted basement cinder blocks

I've started to paint my basement with white primer, and on one wall weird orange spots appeared in the holes I had "filled" with the primer. The wall is made of dark cinder blocks which are pretty ...
2
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1answer
64 views

2-4 inch gap between crawlspace slab (floor) and surrounding wall - Why?

about a year ago I had my crawlspace conditioned. Among other things, the company put in a concrete slab for the floor and added a sump pump in the corner. The strange thing is, there is a 1-4 inch ...
0
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1answer
90 views

Shower head arm rusted through

My showerhead arm is rusted through and water is leaking out everywhere. The tube and its thread is through a concrete wall. I have no idea how to repair. I know I'll have to break through the ...
0
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1answer
33 views

Bathroom addition - pluming drainage problem

New here, and i am a rookie home DIYer. Looking for some help Me and a friend of mine(tradie who knows much more than me) have started trying to add a bathroom to an old double garage at the rear of ...
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1answer
27 views

Repairing finish on basement block foundation wall

I have a room in a partially finished basement which was done by the previous homeowner which is needing repair to the walls. The house is old (1925), and the foundation is concrete block. The room in ...
0
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2answers
182 views

My house is flooding and I have things plugged into an extension cord that is getting wet what do I do

I'm freaking out because the extension cord that has a lot of things plugged into it is on the floor this whole place is concrete floors and it's flooding or sleeping in and it's right there right ...
0
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1answer
86 views

Masonry screws won't engage in brick or mortar?

I'm trying to put a railing on my back porch but my tapcon masonry screws will not stay in the brick or stay in the mortar. Never catches, just goes in.
0
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1answer
62 views

Screw for concrete roof

I am installing some solar panels that measure 41" x 27" on my concrete flat roof using slotted angle bars. What type of of screws (as well as wish and length) would be best to attach to the roof and ...
20
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4answers
4k views

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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2answers
37 views

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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0answers
27 views

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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0answers
56 views

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 ...
2
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2answers
57 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 ...
8
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2answers
2k views

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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2answers
40 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, ...
0
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1answer
36 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 ...
0
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1answer
46 views

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 ...
0
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1answer
46 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.
6
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4answers
694 views

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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2answers
70 views

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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2answers
51 views

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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2answers
79 views

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 ...
0
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0answers
33 views

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. ...
0
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2answers
76 views

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 ...
0
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3answers
67 views

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 ...
0
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0answers
51 views

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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0answers
30 views

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 ...
4
votes
3answers
275 views

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 ...
1
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1answer
85 views

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 ...
0
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3answers
86 views

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 ...
0
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1answer
36 views

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 ...
0
votes
1answer
29 views

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 ...
1
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0answers
43 views

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 (...
0
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0answers
39 views

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 ...
1
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2answers
66 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 ...
2
votes
1answer
297 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
73 views

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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4answers
93 views

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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2answers
87 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 ...
0
votes
2answers
73 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
105 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 ...
0
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3answers
62 views

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 ...
2
votes
1answer
174 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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2answers
48 views

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 ...