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 type of subfloor should be used for Engineered hardwood flooring installed on grade concrete slab?

I would like to install engineered hardwood flooring over a concrete slab which is on grade. It is the first floor of the house, there is no basement and the house was built in the 1990's. I have seen ...
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1answer
23 views

Concrete caulk vs expanding polyurethane crack sealant

I'm starting to finish my basement. First step is sealing up some various places water has come in over the years. I've already fixed grading outside, but also want to seal inside. I have one crack ...
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26 views

Help! enclosed porch/sunroom foundation

We just purchased a home and now that the snow level is not 4 feet high ( we live in central NY ) we see that the concrete patio/foundation has horizontal cracks, and crumbling along the side, corner ...
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1answer
30 views

What should I do with a large gap in a concrete floor

The grout in the tile has cracked or separated all the way across the house from one side to the other. I figured it was normal due to settling. In the kitchen it has become really bad, to the point ...
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1answer
522 views

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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0answers
18 views

making and existing concrete step taller

I have a step down out the back door of my house and the first step down is way too far down, about nine and a half inches. ...
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1answer
27 views

Are there any penetrating sealers for concrete countertops that will darken the color?

I am in the process of grinding and polishing a pour-in-place concrete countertop. When I am done, I want to seal with a penetrating sealer. I don't want a surface epoxy or wax sealer. I like the ...
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1answer
23 views

Repainting my lanai floor

I'm painting my lanai floor and it has been painted last year but changing the color. Did one area and let it dry 24hr. and I can scratch it off/ I used the paint Home Depot sold me for concrete. What ...
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2answers
167 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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3answers
633 views

What is an appropriate sealer for a Papercrete bench?

I've built a bench out of tires and papercrete two years ago. i've sealed it with lime plaster. in the past two years it held up against 500 m"m of rain in the winter and Mediterranean sun 7 month ...
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2answers
327 views

How do I repair this damage to my driveway?

After the brutal winter, my wife and I found several locations on our driveway where the concrete is crumbling. This is the worst of them: In the past, I have used self-leveling concrete caulk ...
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3answers
27k 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 ...
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1answer
30 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 ...
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1answer
118 views

How to fake this concrete effect with paint?

I'm attempting to imitate this concrete wall (at least I think it's real concrete!), using acrylic paint. For my initial attempt I was thinking of working with two grays (one slightly lighter) - ...
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2answers
74 views

What's the proper way to address a moisture issue in a concrete slab?

About 4 years ago my wife & I purchased a home. It was approximately 10 years old at that time. The foundation is a concrete slab. Approximately 2-3 years before we purchased the house, the ...
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2answers
94 views

Which type of mortar or cement to set electrical box?

I have cut out two holes for 4", metal electrical boxes to be set in to the exterior walls of an old block and stucco garage. I need to secure the boxes by setting them in either concrete or mortar, ...
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3answers
1k views

Should I use self leveling concrete to repair settlement cracked concrete slabs?

I have a concrete slab in the breezeway of my house that has several settlement cracks in it. Can I use self-leveling concrete to repair this?
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1answer
77 views

What can I do about this deteriorating staircase?

The side entrance stairs to my home are deteriorating. They appear to be several different patches, coats and possibly capped concrete. I have a temporary fix lined up to make it safe for travel. My ...
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2answers
89 views

Can I put gypsum and paint finish on top of a concrete fast set repair mortar?

I have a finished concert pillar in my living room that I need to be patched and pained. The pillar has final gypsum and paint on top of concrete. Since the concrete is chipped off I need to use a ...
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2answers
190 views

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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1answer
63 views

How should I extend a concrete patio under an existing deck?

I have a 18x20 second floor deck with three 6x6 support posts. Under the deck is a 40-year-old, well-settled, 12x20x6" concrete patio. The deck posts are set outside of the patio, set on footings ...
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1answer
42 views

Where to seam concrete countertop?

I'm looking to do a concrete countertop and would like some advice on where to make the seams.I was thinking either where the red or the yellow lines are. Thanks, greg
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1answer
248 views

Will using concrete anchors in wall studs cause problems?

While installing a wall mount for a 48" TV, I realized I made a mistake. I drilled a ⅜ pilot hole in the wall stud and then installed the anchors provided with the mount that the lag bolts would be ...
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2answers
380 views

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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3answers
37 views

How do I remove adhesive from outdoor concrete deck that is textured?

I have an outdoor deck that had the old green carpet truf glued down. I removed it some time ago and want to remove the adhesive from the concrete, it has the brushed finish so the adhesive is in the ...
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0answers
49 views

What should I do with tree root upheaval in front of my drive way?

I have noticed an issue in front of my drive way. On the left side of my house, one of concrete slabs has been lifted by tree roots. The problem seems to get worse as time goes on. I am living in a ...
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2answers
197 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 ...
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1answer
32 views

How can I close off a toilet drain in a concrete floor

I want to remove the toilet and turn the bathroom into a laundry room. How can I close off the drain?
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2answers
63 views

How to prevent concrete roof from Absorbing water

It's winter again and rainwater still collects on my flat roof due to it's bad tilt, Because of that the concrete absorbs a lot of that water into the second floors roof and it's really visible on the ...
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2answers
87 views

How can I stop a porch crack from causing internal cracking?

My front porch slab has cracked and part is at least an inch lower. It is supporting the roof. Now there is a crack going up the inside of my drywall at the same place. Suggestions on how to solve ...
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3answers
25k views

How can I repair the cool deck around the pool?

In places around the pool the cool deck has flaked off and I can see the bare concrete. The previous owner tried to patch it in places but it looks horrible because the texture AND color don't match. ...
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0answers
11 views

concrete stain protection

I want to make a shelf (floor standing) out of concrete, to surround our sofa, so that we can put cups/win glasses on it, and a wine rack underneath. I have done some experiments with the concrete, ...
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1answer
68 views

What is recommended method to fix sunken garage floor slab?

I have an attached one car garage where the floor slab seems to have sunken in one corner by about an inch and a half and varies lesser amounts in other areas. The slabs continues behind the garage ...
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0answers
32 views

How can I figure out how much load a concretet slab can take?

I have a sun room that has existed for around 12 years. It is on a concrete slab, with two retaining walls and a 2x4 wall structure for holding screens. I want to convert it to a enclosed room with ...
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1answer
29 views

When to use concrete plasticizer

When should one use a concrete plasticizer? Should it be used for internal floor slab?
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2answers
78 views

What can I do about my deteriorating basement floor with a large hole that seems to go right through to clay?

We live in 90 year old house with an unfinished basement. I've been working on removing a lot of the crap that the previous owner did, and removing a lot of concrete debris. Then I ran into this ...
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2answers
53 views

How can I remedy moisture intrusion from my concrete slab?

We bought a house a little over a year ago. The old carport had been converted into a den. It had musty, dirty carpet, so we ripped it out. A big problem we ran into is that we live in west Tennessee ...
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3answers
4k views

Should I use a 6 mil poly moisture barrier for engineered hardwood floor installed over concrete slab-on-grade?

I am planning to install an engineered hardwood floor over a slab-on-grade subfloor. The slab is bone dry but I understand it's wise to install a moisture barrier anyway. My plan right now is to ...
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2answers
548 views

How to install level wood header under sloping garage door opening

I am wood framing concrete garage door opening described with pictures in this question. Top concrete header is about 2" inches out of level across 9' opening length. I want to install 2x8 PT header ...
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1answer
97 views

How can I level a sagging concrete floor in a condo building?

I am purchasing a second floor condo that has a huge sag in a corner of one of the bedrooms. There is approximately a 1 foot drop in the corner. The issue has been resolved in the basement footings ...
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2answers
141 views

Is it okay to build a fire pit with concrete?

I want to put a small fire pit (3ft x 3ft) into backyard. I checked the stone options at home depot & lowes and just the material will cost around $250. I was thinking about building a mold and ...
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3answers
2k views

How can I fill a void in a concrete seawall?

My concrete seawall (on a freshwater lake) has a void in a bottom corner. It seems to have been created with the void -- it's not a result of trapped water freezing and pushing out a chunk. I'd like ...
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0answers
53 views

Self levelling concrete as primary floor?

My kitchen currently has a concrete floor with a bit of underlay and then some funky blue vinyl on top of that. A new kitchen is going in Q1 this year and I'd quite like the look of concrete floors. ...
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1answer
3k views

What should I use to fill drilled concrete holes that are not used anymore?

Just wanted to do some home repairs and found lots of old drilled holes. I've used putty to cover them up but it occurred to me that there would be air gaps for the holes as the putty cover over them ...
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3answers
8k views

How to finish room with protruding concrete ledge/foundation?

I am finishing a basement room and have a concrete ledge which is part of the foundation. It protrudes into the room about 2.5 inches and is about 6 inches high. This ledge is the result of a ...
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6answers
35k views

Do I have to remove the old thinset before installing new tile?

I will be installing some new 12x12 tiles in two bathrooms approx 25 sq/ft each. When I pulled up the old tiles, there was no thin set that had made contact with them so the removal was very easy. ...
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4answers
3k views

how to repair large, uneven crack in concrete floor

I have a really long (about 20') uneven crack in my cement garage floor. Not only is it jagged, but the sides of the crack range from flat to about 1/2" high. I want to level the sides of the crack, ...
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1answer
25 views

I need to Improve drainage in croncrete

I have greyhound kennels. Built them brand new the concreter was a moron and the fall is everyway except towards the drains, I was wondering If it's oossoble to cut a small trench to squeegee water ...
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1answer
80 views

How to fill hole in slab after installing new closet flange

The plumber broke up some of the slab, removed an old cast iron Y and put in a new elbow and closet flange. He left back filling and patching the slab to me (my choice). The edge of the hole is ...
5
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3answers
9k views

What is the best way to fill a hole in a concrete basement floor?

My basement floor has a hole cut where the water line enters the house. This hole is around 2ft square, and digging down a little I hit dirt and small roots. I'd like to seal this hole as I believe it ...