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 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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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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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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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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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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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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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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23 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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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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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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82 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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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 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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32 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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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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24 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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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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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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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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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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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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537 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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84 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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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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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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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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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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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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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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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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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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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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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 ...
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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 ...
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What can I do about a house with internal concrete floor with no DPM?

My partner and I have just bought our first home.A 1950's bungalow which is need of refurbishment. So far it has thrown us a ton of surprises! The worst so far being the floor in one of the bedrooms. ...
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How do I replace a wooden fence post that was set in concrete?

I need to replace a wooden fence post that was set into concrete. The post has snapped through rot at the base and the rot has set in so far that the post snapped about 2 inches beneath the surface. ...
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concrete and slate roof has started to leak

I have a house with a concrete roof with slates stuck on it (probably using gypsum). The roof is pitched, I would guess somewhere around 20 degrees. It has started to leak in a few locations. Can ...
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Should I patch this hole in my slab?

I'm in the process of tearing out carpet and installing laminate in my guest bedroom. After I got the carpet out, I discovered a hole several inches across underneath the wall that borders the garage. ...
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How can I pour a concrete floor over a particle board subfloor?

I want to pour concrete over the particle board subfloor in my living room. I like the loom of stained concrete. We have a crawl space underneath. My question is what product do I use? How thick so it ...
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Should I pour a footing and pier at the same time?

I am pouring concrete for deck footings. I need an 18in diameter footing to carry the weight, and I will also use a 8 in diameter pier to bring it to an inch above ground. The footing must be 30 in ...
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Temporary floor fix - Ikea laminate on concrete and wooden boards

I've just bought my first home and have started the long-term and rather daunting task of getting it into a decent state. First on my list is the Kitchen floor. See photo below. I pulled up the smelly ...
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How can I repair a cinder block wall around a sewer line?

After having replaced ~30' of 4" cast iron w PVC, I'm left with two holes in the cinderblock foundation. The holes are the height of 1 block and about 1/2 the width of a block. These leaves a pretty ...
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What is the best way to remove and prevent leaf stains on concrete pavers?

We have a brand new paver stone walkway/patio. To my dismay, I noticed that their were leaf and acorn stains from the oak tree in the front yard. I've learned my lesson and I'm going to try to keep ...
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How to hang a projector screen from a thin horizontal part of slightly curved ceiling

I have a brick wall in front of which I want to hang a projector screen. Here is an image of a typical projector screen that I am looking to buy: The part of my ceiling near the wall is curved(the ...
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Extending the back of our house

We are going to be replacing our entire roof with a metal roof this summer. I was wondering if it would be possible to extend the back of our house before we put on the new roof. We would have to pour ...
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1answer
79 views

Can I use a toggle bolt if there's no space behind the drywall?

While trying to install a 14lb metal shelf to the wall, I had learned from a previous installation mishap to upgrade from plastic anchors to something stronger. I picked up a few toggle bots (3/16" w ...
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How to waterproof metalic electrical conduit entrance in concrete wall?

I have concrete garage inside the hill below house level. Electrical metal conduit runs underground and enters the garage at the top of concrete wall. It may 12"-15" below surface. See pictures. It's ...
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Running irrigation pipes under a large concrete pad

I'm planning on redoing the irrigation system in the back yard and considering extending it to cover the front yard as well. My only problem, the house is completely surrounded by a concrete patio. ...
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Water heater on concrete--should I build a platform? how much heat loss in winter?

I don't know if that title the best way to phrase the question. It's winter(ish) now, and I swear the hot water just doesn't last as long as it does in, say, September. The water heater tank is ...
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Need advice to prevent runoff water from going into neighbor's yard

I'm looking for some advice on what I can do to prevent runoff water from going into my neighbor's yard. I am an auto detailer so I am constantly washing cars in my driveway. The neighbor also parks ...