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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Slab foundation floor crack

I am purchasing a new construction home. The foundation, patio, & garage slabs were all poured at the same time, in mid-september. The home is not yet complete, but we have noticed a crack in the ...
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How to insulate slab that's been extended?

I bought a house built on a concrete slab on grade. It's an older house, so no part of the slab was insulated. At some point in the past, previous owners decided to pour concrete around the entire ...
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173 views

How to clean sand and brick dust off concrete paver blocks?

I have a floor of concrete paver blocks. There is a brown stain on them due to the presence of sand and bricks powder. I'm afraid of using more Hydrochloric acid because it didn't remove all the stain ...
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741 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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87 views

Does Limecrete exist in North America?

I've been learning a little bit about limecrete And I thought it'd be fun to try a project with it (small one) but I can't seem to find it as a product in North America. Most (all?) references to ...
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Is this normal for the brick to extend past the concrete slab foundation?

I am in the process of buying a home and noticed that the brick extends past the concrete slab foundation. I checked different houses around the area and all were flush with the concrete slab. Is this ...
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144 views

How to level sloped concrete ceiling, and is it worth it?

I want to remove popcorn ceiling in a 7' by 14' room and turn it into a smooth ceiling. I have just built this room. The walls are not yet painted, so now is a good time to do the ceiling. I know how ...
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574 views

How to reinstall iron stair railing in concrete that rusted out at the base?

So one day some time ago our iron stair railing going from the sidewalk to the stoop rusted through at the base of the posts and fell right over. I had a welder friend cut off the rusted portion and ...
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403 views

How do I rebuild a large fence gate?

I have a concrete driveway that continues to the side of my house, with a double gate (a person gate, and a large vehicle gate). The gates are very old and made only with 2x4 frames and standard ...
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423 views

Can I fill sagging spots in my driveway with asphalt and hot tar?

We've had these sagging spots for about 10 years now. They're not getting any worse. Sure, we might get a new driveway in 10 years, but other than this, our driveway is in beautiful condition! They ...
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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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465 views

How do I make this large mold for concrete countertop?

I've been wanting to make a concrete counter-top for a long time but there's one section that is giving me trouble. The mold would have to be bigger than would fit on a standard 4' x 8' sheet of ...
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124 views

Can you apply surface-bonding cement over stucco as an exterior finish?

Let's say you have a wood-framed wall with cement-based stucco cladding and it's in pretty good condition, with a few typical stucco cracks. If you wanted to seal the cracks, add another layer, and ...
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761 views

Can I put concrete over PVC pipe?

I have my laundry room in the backyard and there is an area that had a thin piece of concrete and below it there is soil. Beneath the soil there lies the drainage PVC 1 ½” pipe, gas line (not ...
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3k views

How to plug hole in foundation?

Here is the front of my house. As you can see it is a 2-story dwelling on the left with a garage on the right that is connected to the main house by a "sunroom" (porch/breezeway/whatever). The main ...
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141 views

Technique to level a patio for concrete and tiling

I currently have a large patio which has brick paving. unfortunately the paving has started to sink in spots and gathers rain water. I will be removing the brick and laying a slab of concrete, in ...
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2k views

How to raise a wooden floor to same height as adjoining concrete floor before carpetting?

I have a room which has a concrete subfloor on one side, and wooden floor boards on the other. Unfortunately the wooden floorboards are about 1.5cm lower then the concrete. What's the best way to ...
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145 views

How to level concrete floor that is chipped and has left over thinset

I removed some tile from a 10' by 15' section of my basement floor. As I was removing the tile, much of the concrete chipped away leaving low areas. Other areas have thin set remaining in the shape ...
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727 views

How to connect wood to concrete

How can I attach wood to concrete in this bench?
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267 views

I did a bad job pouring a cement walkway, how can I fix it?

I poured three 4'x4' slabs to make a walkway beside my house. The first two look alright but the third one is a half inch lower than the one next to it and slopes up at the open end where I want to ...
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1k 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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184 views

How can I smooth an uneven concrete floor?

I have had a extension built at the back of my house. It is almost complete now. I had a 6 ft. 6 in. patio door at the back of the house, and the builders left it till last to remove. This will leave ...
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322 views

How should I remove a raised concrete pad on my basement floor?

I have a raised square of concrete, about 42" by 42" by 6" in my basement. Its probably an "equipment pad" of some sort, not sure what it was originally for, but it is inconveniently placed. Its ...
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How can I edge concrete without an edge trowel?

How can I make a concrete floor (also using dry shake color hardener) with a proper edge, without using an edge trowel? In Brazil I cannot find an edge trowel anywhere, so I would like to know if ...
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How do I fix badly peeling and hairline fractures on indoor concrete walls?

How do I paint and fix peeling paint and hairline fractures on my indoor concrete (cinder block) walls? The popcorn ceiling is a mess too.
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Basement subfloor, how exactly should I do it?

I am finishing a basement with my father and want to put in a subfloor. I know if there was ever enough water I would probably have to replace the floor anyways but want to give myself a couple inches ...
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1k views

Which is better/safer for cutting concrete slab, hammer drill or angle grinder?

I have to cut a 100x500 mm hole in a concrete slab that is about 80-100 mm thick. I think that I have two options to do that: 1) 9" angle grinder with segmented diamond disc: cut the long sides, then ...
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117 views

How to remove flaking concrete sealer/paint

After my basement flooded and I removed the carpet I found the previous owner had sealed the floor but it's flaking up now and I want to remove it all. It's about 200 sqft so a wire brush by hand is ...
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103 views

How do I remove concrete that has splattered on my brick pavers?

We installed a brick patio, and splatter from wet-cutting the bricks ended up on the installed bricks. How do I clean it?
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1answer
503 views

What is the best way to secure (2x6) wood framing to the concrete portion of the garage opening?

I live in a raised ranch. The lower half of the house is divided into a 2 car garage and a living area. Also the lower half of the house has 8 ft. ceiling (about 4 ft. concrete walls and 4 ft. wood ...
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2k views

Howto convert old basement slab into finished concrete floor?

Doing a complete remodel, after Boulder flooding, of my basement. After demoing and floodcutting, all that's left is framing and concrete slab. I'd like to turn this into a nice concrete finished ...
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338 views

How should I build a base floor for a large summerhouse?

Hi my question has 2 parts about piles and creating a subfloor. I want to install a 4.8x4.8m (~16'x16') summerhouse; its existing floor is 24mm (~1") floor boards on 75x50mm (~"2x3") floor posts. I ...
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Are cracks in a newly poured concrete basement floor a problem?

I'm having a new home built and found a large crack in the newly poured concrete basement floor and wanted to see if it's something I should be concerned about. The floor was poured sometime in the ...
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Latex paint over concrete primer

I have put concrete primer on my poured concrete walls in my basement. I have enough of construction latex paint primer to go over it all again. Is it okay to use on top of the concrete primer and ...
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299 views

Can I use EPS concrete for a fire bowl?

I found this recipe for EPS concrete, and am thinking of using it to make a fire bowl (a decorative concrete bowl like the one described here, which holds a chafing dish gel fuel pack.) I would like ...
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419 views

How can I drill through concrete blocks to allow drainage from my backyard?

My back yard has a brick floor and is surrounded by a concrete block wall. In heavy rains, the yard pools with rain water. How do I go about cutting drain holes in the wall or floor?
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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 ...
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143 views

Can I repair the cracks between the bricks in my fireplace?

The bricks surrounding my fireplace have cracks between them. It's as if the thermal expansion/contraction has eroded the mortor between the bricks. I have had some serious fires in there and haven't ...
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276 views

What 'quick & dirty' finish for a concrete floor

I am moving into a new home for 1-2 year period. Its an old office building and the landlord is flexible with how I decorate; as it will eventually be totally gutted and renovated. My 3 rooms are ...
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466 views

Attaching sill plate to concrete, how do I attach framed wall to sill plate?

I am building a 12x12 shed on a concrete slab. I am going to bury j-bolts in the wet concrete so that I can attach the treated sill plate to it. The problem I'm running into is that the nut will be ...
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223 views

How to hang shelf on 2cm thin wall?

I would like to somehow saw out a wood board that fits into the corner as seen on the picture below. The problem is that both walls are only 2cm thin. The shelf needs to be able to hold a pair of ...
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422 views

Concrete Mix for making small objects [closed]

I want to build desk objets out of concrete, such as the ones in the images below ( i don't own any of them, they have been taken from around the internet). ...
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3answers
936 views

Can I pour concrete if it's raining out?

I have 6 bags of concrete that I need to mix and pour for 2 deck piers. It's raining lightly outside. Should I reschedule or just do it and cover with plastic when we're done?
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889 views

What should I do about my concrete shower curb that I did not remove all the air bubbles from?

I'm building a concrete shower curb and pan. I built the curb and when I removed the 2x8 forms I notice that I didn't pack the cement all the way to the bottom in some parts: A bit crumbled and ...
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3answers
440 views

How can I remove oil stains from a concrete floor?

I rented a home, and the garage floor is concrete. It looks like the previous owner had a small car that dripped more oil than it retained. It has been parked on multiple spots, so there are ...
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488 views

How do I flatten my uneven concrete floor?

We have an old Victorian house with a concrete floor throughout the ground floor. The ground floor is partitioned in two by a dividing wall and french doors. From the front of the house to the ...
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310 views

How to secure bookcase to drywall right over concrete without drilling concrete?

I got some tall bookcases and want to set them up against a wall in a condo. The wall is shared with my neighbor and as such it seems to be a half inch drywall right over a concrete wall, so I don't ...
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How do I move a slab of concrete?

I want to build a fence in my backyard by my garbage stand is sitting on a concrete slab and that slab is in the way of where I want to put the fence so I want to move it over a few feet. The slab of ...
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105 views

Repairing animal damage in concrete driveway

My driveway has a few separate slabs (is this the right terminology?) and an animal has been digging in the gaps between two slabs. The gap is 1 - 1.5" wide. It looks like the rain is washing away the ...
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353 views

Building on top of 3/4'' plywood subfloor

I want to build this: http://www.mrmoneymustache.com/2012/12/21/how-to-make-a-relatively-sweet-shower-cheap/ and I'm building in my basement bathroom: on top of the foundation I have 2x4 (horizontal) ...