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.

learn more… | top users | synonyms

3
votes
1answer
60 views

Anatomy of a concrete wall – what are all these layers called?

So my partner and I are trying to resurface a concrete wall in an old house in Taiwan. Before I get into the nitty gritty of asking how, I just want to clarify my terminology first – I think I've got ...
1
vote
2answers
67 views

Can I drill a small hole in a concrete beam?

I need to pass a bipolar electrical cable through a concrete beam (30cm high, 15 cm wide) (12x6 inches). The hole would need to be about 1cm (3/8"). Is it safe to drill through it? There is no wall ...
2
votes
2answers
91 views

Making sense of an existing sump system

I just bought my first house, but I can't seem to understand how the sump worked. I'd like to make sure it's hooked up and ready to go should the basement ever flood. When I first walked in, the ...
3
votes
2answers
860 views

How should I anchor a hand railing to sandstone steps?

I've got three exterior steps made of natural sandstone. They are 6 ft wide, and 10" thick. I need to anchor a metal handrailing to them. The railing has two feet: 1/4" metal plates with 3/8" holes ...
0
votes
3answers
90 views

Hanging clothes on a line between concrete pillars without drilling

Question says it all: I'd like to hang a "light" load (say 30 t-shirts/pants) between two concrete pillars, without doing anything permanent to the pillars, like drilling (they are public property and ...
0
votes
2answers
4k views

How big a hole do I have to drill in concrete to embed rebar in it?

I have a concrete patio that I'd like to use as the foundation for a CMU wall. I'd like the CMUs to be tied into the patio slab with rebar. I get that the gist is to drill a hole in the slab, put ...
0
votes
1answer
55 views

Can I pour concrete next to my foundation?

I'm planning to install a 4x4 fence into the ground by digging up a hole, adding some gravel, then pouring concrete in. Is it a problem if the concrete touches the foundation of the house? I've added ...
0
votes
1answer
186 views

Why are both exterior and interior walls constructed of concrete block in my home?

I bought this house 9 years ago, it was built in 1954. A few years after I had gotten it, I decided to get creative and pull down some of the paneling on a wall that separates the kitchen from the ...
1
vote
1answer
22 views

Gravel under concrete stairs

Laying gravel under flat concrete slabs is easy because the levelness of dirt bed makes it easy to distribute it evenly. But when preparing to pour concrete stairs on a graded bed, what are good ways ...
3
votes
4answers
332 views

Hand tool for packing dirt

What is a good simple hand tool for packing small surfaces of dirt to prepare it for laying concrete? I've seen big pneumatic hammers at large construction sites and was wondering if there is a good ...
3
votes
1answer
44 views

Should concrete stair landing be anchored to building?

I have a small, approximately 3x3' concrete landing in front of my basement door, from which stairs go up to the street level. I need to redo it and was wondering whether to tie the rebar from under ...
1
vote
2answers
396 views

How can I properly support a raised concrete patio?

I am planning on building a raised concrete patio. I would like to build the perimeter of block and fill it with stone and then cap it in concrete to be finished with blue stone later. The patio will ...
3
votes
5answers
6k views

How can I stop water from coming in through a crack near the top of my bulkhead wall?

I have a bulkhead entrance to my basement. The bulkhead walls are mostly fine, with the exception being near the top. The top 6 or 8 inches or so of the walls are constructed of what appear to be ...
4
votes
7answers
69k views

What water:cement:sand ratio gives the strongest mortar?

A typical mortar mix ratio is 1 cement : 3 sand. But what is the water ratio? Is it 0.5:1:3? Would a 0.5:1:2 ratio be a stronger mortar? Our next door neighbor has a dog that digs like a pro. The ...
1
vote
2answers
87 views

Concrete patio against the house

I am going to be starting a project in which I will be pouring my patio next to my home, it will be approx 10' x 50' The home is on a concrete slab, no basement. I have to two questions. What is ...
1
vote
1answer
35 views

Greenhouse (cold frame) side walls - footing question

Planning a hoop house, or cold frame style greenhouse. I live in Nebraska, we get pretty consistent winds, not unusual to have 50 mph gusts. I want set two parallel 3-4 ft tall rows of 4x4 posts, 4 ...
3
votes
4answers
8k views

What is the best way to remove pet odor from concrete?

The concrete floor in my garage had been home to a large dog for several years. There is a visible stain and strong smell in one area of the garage floor. The concrete does not appear to be sealed ...
2
votes
1answer
77 views

Is a floating perimeter slab a good approach for a dirt-floor shed?

I'm building a 16' x 7' shed and chicken coop in Seattle. I want it to have a dirt floor and be safe from predators crawling underneath. I've been struggling with how best to do the "foundation". I ...
1
vote
1answer
83 views

flat concrete roof with weathering course leaking in many places

It is about 30 yr old building with flat concrete roof with weathering course on top. It started leaking in many places during rainy season. The roof area is about 1200 sq.ft open.what is the remedy.
1
vote
1answer
33 views

Where to install underfloor heating under tile; thinset layer or concrete?

Putting in either a thermal wire/mesh (SunTouch) type underfloor heater or carbon film under tile. The subfloor is OSB. Going to pour 3/4" of LevelQuik Self-Leveling Concrete (replacing Gyp-Crete ...
4
votes
2answers
438 views

Installing Drywall on Concrete Ceiling?

I have a concrete ceiling in my basement and would like to cover it with drywall. Specifically, I would like to take the flat surface concrete ceiling and put another ceiling under it so that I can ...
4
votes
1answer
583 views

How can I thicken Acid Stain myself?

I have been doing a lot of decorative concrete around my house, and I have yet to find a masking tape or caulking or anything that can hold the acid stain where I want it. I finally found something ...
4
votes
1answer
90 views

Concrete foundation crack

Two storey home, 14yrs old. Concrete foundation. Ground is mostly clay. Steel I beam crossing the middle of the basement ceiling to distribute load. The I beam is inset into the top of the ...
0
votes
1answer
30 views

Do I need a vapor barrier on an 8" pour + carpeting over tile?

So I am finishing my basement and the side I'm finishing has an extra 4" pour on it as well as old 8x8 asbestos tile. My plan is to carpet over it. Do I need a vapor barrier? I get that concrete is ...
1
vote
3answers
83 views

New Basement Floor, house not framed yet

We are building a new house with an exposed basement. I had the floors poured a week ago while still warm in December. We have not framed the house up yet, meaning no deck, walls, roof, or HEAT. My ...
3
votes
2answers
80 views

What are the specifics I should be looking for in a quote to replace my concrete steps?

The front steps in front of my house are deteriorating. I am trying to get a contractor to replace the limestone slab steps with concrete. For example, enclosed is a picture of my estimate from 2016. ...
1
vote
1answer
59 views

Is permeable concrete suitable for a houses foundations?

I'm curious if using permeable or pervious concrete for all or part of a houses foundations would provide excellent flood protection? Would it be strong enough to support a house and if not could it ...
2
votes
2answers
3k views

How can I replace laminate with polished concrete flooring?

I'd like to investigate whether I can replace my first-level flooring - currently faux-wood laminate - with polished concrete. What do I need to know? Is it even practical to put down polished ...
0
votes
0answers
35 views

Failing foundation outside wall looks like it is buckling but it's not

My contractor poured a grey beam on the outside of the failing wall but it over time made it worse. I was wondering if I make a 3 plate beam out of 2 by 10 approx 20 feet long put it on the inside on ...
3
votes
1answer
44 views

Good, affordable pathway materials for sidewalk with tree root problems

I recently moved into my first home. Unfortunately, the concrete slab pathway leading from the town sidewalk to the front door is buckling from the roots of an enormous pine tree that grows near it. ...
-1
votes
1answer
60 views

Load Bearing or Not How Can I Know For Sure

We have an unusual 3 inch thick poured concrete floor in a steel mesh in the ground floor of our house, under this is a basement like area with an old riveted steel across half of it and a couple of ...
0
votes
1answer
51 views

Can I use mortar to fill channels in a concrete floor?

I recently had central heating installed in my 2 bedroom ground floor maisonette. We installed all the pipes in the channels which we dug in the concrete floor. I have covered all the pipes with ...
0
votes
2answers
45 views

How to mount handrail to drywall over concrete

Any help how to hang the railing back up on the stairway. It is townhouse wall with drywall and concrete behind it.
0
votes
3answers
60 views

How can I achieve a Quartz look using concrete for a bar top?

I want to make my own concrete bar top but I would like it to have a bit of a sparkle like quartz has. Any suggestions?
0
votes
2answers
98 views

How to cut concrete block with a circular saw

I have some concrete blocks that are 4 inches by 6 inches. I need to cut them in half at a 45 degree angle. Can I do this with a circular saw and a masonry blade ? I would also make a jig to cut ...
0
votes
3answers
44 views

What is a suitable mold material for a concrete bar top?

I would like to make an L-shaped concrete bar top (single piece). However, I want to make the corner have a large curve (12-15" radius?). How can I create a mold to accomplish this? What materials ...
0
votes
0answers
32 views

Can a seat wall and fire pit be built on existing pavers patio?

I have an existing circular area in my uncovered paver patio area. I would like to have two curved seat walls, either stucco or stone veneer with flag stone or cement seats and no back, and a fire pit ...
0
votes
3answers
68 views

Bathtub Drain Leak near Concrete

After recently moving into a home (built in the mid 90's and apparently went through a remodel at some point), the guest bathroom tub started leaking. I noticed the leak in the room on the opposite ...
3
votes
2answers
1k views

How should I install flooring over fresh concrete?

I have fresh concrete poured in my basement. Planing to use Metrofloor Engage Select vinyl plank for most of the floor. Contemplating ceramic tile for the bathroom if vinyl is not good enough for ...
1
vote
1answer
43 views

Wall leaks due to rotten wood in footer!

My home was built in 1979, and I have a small leak in the basement. It appears to me that the water is coming from a piece of 1x4 that is embedded in the footer, presumably this wood goes all the way ...
1
vote
1answer
101 views

Cleaning indoor concrete floor without damaging it

I just finished helping a colleague clean out his (large) garage at his new house. He's gradually converting it to a indoor gym for himself and his kids (ie: indoor swing set, toys, etc, with a small ...
2
votes
1answer
214 views

Installing a strong-tie post anchor on unlevel concrete

I'm building a short (3.5 ft) fence in my front yard. I have most of the posts sunk in dirt holes, but two of them will need to be mounted on a concrete slab. The problem is that the slab has a ...
1
vote
0answers
16 views

Mount wooden post onto uneven concrete [duplicate]

Hi I'm wanting to mount a 112x112x3000 post onto a concrete slab. I have purchased L shaped brackets to do the job. Because the post will sit at the edge of the concrete I can install at most three ...
1
vote
3answers
294 views

Hanging picture on a very hard concrete wall

Situation: Appartment in a panel building. Very hard concrete walls -- all, thick or thin. No plastic hooks (like these on alibaba that usually work for people around do not work for me, the little ...
1
vote
2answers
57 views

Concrete Floor for 400 Gallon Water Tank

I am planning to build a concrete slab on a soil surface to hold a 400 gallon water tank (Shown Below). I want to make it 7' x 7'. It should hold about 3,500 lbs. Would I need to put in rebar? I've ...
1
vote
2answers
58 views

What material provides semi-permanent, strong bonding with a concrete floor?

The professionals doing repairs at a workplace seem to be capable of patching stairs with material so tough, and make it stick to the existing cement with such strength, that the patching survives ...
4
votes
2answers
8k views

How to level a section of raised concrete floor?

I had a plumber move a toilet drain on cement slab. The new concrete he poured is about 1/8" higher than the rest of the floor. I need the floor to be level for tile installation. The new concrete is ...
3
votes
3answers
103 views

How to run wire through steel garage floor system

We are building a carriage house, with a 4 car garage and a basement underneath. The basement has steel I-beams and the metal b-decking that the garage floor is poured on top of as a ceiling. What ...
1
vote
1answer
356 views

Remove paint from concrete floor (indoors)

I'm trying to find a solution to prep my concrete floors (slab) for tile. A contractor I had hired to remodel my home did an outstanding painting job -- so well that he managed to cover most of my ...
10
votes
3answers
2k views

Why are there metal tabs protruding from my poured concrete foundation walls?

What are these metal things sticking out from my basement walls? Can they be removed? If so, how?