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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Repairing Exterior Concrete Foundation Between Garage Doors

I'm planning on parging the exterior foundation of our house and I'm starting with the small concrete walls (see pic) between our garage doors. After cleaning everything and removing any loose ...
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Do I need to “fill in” concrete control joints before floating floor installation?

I am preparing to install a laminate floating floor over a concrete slab in my basement. The concrete slab is installed in what appear to be 18' x 18' squares, broken up across the dimensions of my ...
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Is it possible to “push” a leaning concrete wall upright?

We have a driveway with a poured concrete retaining wall that is backfilled up to about 5 feet high. The apex of the wall sisters up to the house foundation. There is a gutter that spans right over ...
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Fix for sagging gate hitting concrete

We have this gate that was installed by the prior owners of the house. It is sagging at the latch side and bottoms out on the concrete. It seems to me that I need to do a couple things to fix this: ...
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Cracks on second store concrete slab…bigger

Since my last posting, I've discovered potentially bigger problems. Any advice on how to deal with these? Just fill? It seems that the previous owner took out the sliding doors and installed windows,...
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Concrete screws not going in all the way [duplicate]

I'm attempting to use tapcon 1/4in by 2.75in concrete screws to affix something to a wall of poured concrete, but it's only going about 3/5 of the way in before refusing to go any further. I used the ...
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Patching a hole in an interior block wall

We have a bathroom that had the shower valves in an exterior block wall (OLD construction, lake cabin). The valves sprung a leak and the plumber had to knock out the block around the valves to get ...
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Cracks on second-story cement slab

I just purchased a 50-year-old condo. I pulled up the carpet and found the second floor to be a concrete slab. There are thin cracks in areas and a small pit in one area. What are my options for ...
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Building a Retaining Wall Next to Fence

I would like to replace an existing retaining wall (pictured) which is falling apart with one that is as close as possible to the fence line to reclaim some of our back yard from the drive way. Our ...
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Concrete Apartment Balcony Repair

There seems to be two layers on top of the concrete: the thicker, white-ish layer next to concrete the gray, textured layer on top I'd like to fix this up, but have no idea where to start. Would ...
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Leveling first row of CMUs on uneven slab

So I may have a couple to many beers when pouring the slab for my new outdoor fireplace, and "forgot" that I needed to pour it level and not follow the slop of the patio. Whoops... https://ibb.co/...
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Sealing/resurfacing exterior concrete retaining wall

I have a 3 ft concrete retaining wall that runs across our backyard. It collects a lot of black mildew with white spots. Is there a sealant or other surfacing material that I can use to help keep ...
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Concrete cost difference if forms done yourself

Thinking about getting a 4 inch thick concrete slab poured for my back patio. I was wondering if I dug everything out, made and set the forms, and laid the stone and rebar, would that be a ...
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Power drill requirements for steel-reinforced concrete

We have the need for a new power drill (old 25+ year Bosch finally died) and I'm trying to determine the requirements for our situation. We are in a new build (European concrete) property with the ...
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How to flatten (not level) a concrete slab by shimming a subfloor

I will be working remotely permanently and have a another baby on the way so my current home office is going to be a nursery. I would like to convert a section of my garage into an office, but keep ...
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Remove or dissolve concrete adhesive

Trying to remove a pea-gravel covering which is laid over concrete with adhesive. Aprox 100 sq. ft area. Tried to scrape and way too labor intensive. Any adhesive/glue dissolve available?
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How to drywall a concrete footing

I am working on a house built in 1960 that has a supporting wall in the basement which is on a concrete footing. I am ready to put up drywall, and am unsure how I should drywall over the footing? ...
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Concrete table legs

the wife wants me to build a concrete table that is 10' long by 2.5' wide and 3" thick with and overall height of 30". She would like 6"x6" tubing for legs, so I was wondering how thick tubing I will ...
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How to build an additional concrete/cinder block wall in basement, where the crawl space and basement meet

The small basement in my house (built in 1932) has three concrete walls. The forth wall is comprised of vertical wood boards. Behind the boards is the crawl space for the rest of the house. The ...
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How do I tell if dried flooring glue is oil-based or water-based?

I removed vinyl flooring that was glued down (by a previous owner) in the 1990's, and there is a significant amount of dried glue left behind on the concrete floor. The self-leveler and glue that I ...
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Installing drywall in unfinished basement

I have an unfinished basement with concrete walls and soft insulation bolted to it. I’d like to install some drywall to
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Converting old mechanics garages grease pit into a storm shelter

We’re wanting to convert an old mechanics grease pit into a storm shelter. What would be the best way to do. We were thinking concrete for a slab and a wooden door for entrance. What is the best way ...
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Can I set bricks with mortar on a new concrete stoop before it cures?

I'm pouring a new stoop, and I'd like to finish the corners with a brick that's used elsewhere on the house, so everything ties in. I'm planning on pouring the stoop with a channel for the brick, so ...
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Filling a CMU block wall in garage

I have a CMU foundation block wall in my garage that leads to my basement (picture below). Half of the cores are empty and it is about 8-9ft deep. I regularly treat this area and the garage with ...
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Anchoring Aluminum Pergola To Paver Patio

I'd like to install an aluminum 16 x 12 pergola on my existing paver patio and I'm wondering the best way to anchor it. It comes with brackets to bolt the posts into concrete, with the bolt holes in ...
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Bought some concrete last week and the bags are much harder than I would have expect. Have they gone bad?

Never really used much concrete before, but I bought a couple bags last week from Home Depot and I'm pretty sure they must have gotten at some point and partially cured, but just looking for some ...
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Concrete retaining wall with lean and crack, looking for input

We bought our 100 year old house “as-is” a year ago with various small cracks and a firm, but somewhat eroded foundation. This all needs to be addressed eventually, however, a large crack with ...
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Raising Concrete Floor then install Vinyl Plank Flooring On Top

In order to be level with hall, I need to raise the height of the floor by 1/2"-1" in a room in which I am going to be installing vinyl plank flooring. Previously the room was carpeted so with the ...
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Properly Updating Drains for Basement Bathroom Update

Pictures https://imgur.com/a/olBlrHG basically explain it. It was a "full bath" when we bought it and sold as one, (and its recorded as such for tax purposes). I want to convert it to laundry room/...
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Floorplan reasonability check: would need to put a kitchen drainpipe in a concrete subfloor slub

I'm planning a remodel in an appartment, and the way I see the space would work the best is when I bring a kitchen quite far away from the mainlines. And layout dictates that sink drain pipe should ...
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Is this joint between the foundation and first row of mortar typical

Just wondering if this is a normal appearance for the area where the foundation and first row of mortar/brick meet. There are no signs of any structural cracks or anything like that in the area. Is ...
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What should I use to patch this gap between brick siding and top of foundation

I have a small gap between the top of our foundation and the start of the brick siding in one isolated area and was wondering what the best material would be to fill this area.
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Leveling options for an uneven concrete floor in basement?

I live in an old house (somewhere between 1870 and 1920) with a retrofit basement. I also have a high water table, so during the spring rains, we get a trickle of water in the basement ( we've come ...
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removing pebble overlay from concrete base

I started using a power washer in unison with a pole with a heavy metal edge on it. It's going tremendously slow. My question, if I rent a concrete grinder from Home Depot, would that remove this top ...
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Recipe for sand topping mix and concrete overlay for patio refinish

I would like to resurface my cracked and crumbling brick patio with stamped concrete. It is 5000 square feet so I need to find the most economical solution. I am thinking of using a sand topping mix ...
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1answer
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Is a concrete slab required to support a block wall?

I'm starting to plan my build of a backyard grill station / pizza oven. I plan to build a concrete block wall about 4 feet high. I'll put either concrete or stone surface on top, as well as a 1600 lb ...
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How can I attach wooden shelf ledgers to concrete foundation walls?

I am installing some garage shelves for my friend. She wants it strong so she can climb up them, and load it with heavy boxes. It’s no problem for me except that these walls, which will go floor to ...
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Can I create concrete driveway with forms to get the paver stone look without the need for all the aggregate beneath?

We are in desperate need of repaving our backyard that serves as a parking lot in addition to redoing our driveway. After weighing the pros and cons and taking in aesthetics we are interested in doing ...
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How soon after laying is concrete drillable?

I made a small concrete patch along the edge of a room that I would like to set a PT 2x4 base plate on for framing. I prefer drilling and screwing with a lead anchor over using power actuated nails. ...
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Installing a porch over a concrete patio, issues-concerns?

I am working on a house right now and we are trying to figure out what to do with the backyard. Right behind the house there is a 4" concrete pad. It is about 14'x25' and sits pretty flat with a ...
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Is it necessary to seal a newly patched basement floor in an old house?

We recently had the basement drain system replaced in our 1930s bungalow. This required removing sections of the concrete floor and filling the parts that were removed with new concrete when the job ...
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How to mount header bracket for garage door opener to concrete wall?

The anchor of the header bracket securing the garage door opener's rail to the concrete wall above the garage door came loose over time and with vibrations (details in a previous question). What is ...
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What kind of bolt is this? (securing the garage door opener rail to the wall face)

It was used to secure the wall mounting bracket of the garage door opener's tee rail to the concrete wall of the house above the center of the garage door opening. The bolt was inside an expanding ...
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How to pond concrete

I recently got interested in making pots out of cement. The most practical curing method for me is ponding/submergence. When is concrete ready to pond, how can I tell when it's ready, and what should ...
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Foundation pier repair

I have a rather unfortunate problem, rats got into my crawlspace and managed to tunnel directly underneath one of the internal piers(there are quite a few down there, maybe every 8 ft square? I am ...
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Can I drill a 5/8" (16mm) hole in concrete with a cordless hammer drill?

I need to drill a 16mm (5/8") hole in a concrete wall. All I have is a 20V DeWALT DCD795 drill (which has a drill driver and hammer feature) and the appropriate drill bit. Someone suggested to me ...
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Foundation design for a small cabin

I'm planning to build a 14ft x 16ft A-Frame on grade in Vermont this summer. The frost line here is 4ft. My site is at the top of a small, wooded knoll. I know from some exploratory digging that The ...
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Can you glue backerboard to concrete then tile over?

Want to know if you can glue backerboard to interior concrete wall for kitchen backsplash. Can’t drill as it’s a condo concrete wall. Concerned that tiles will shift as concrete wall shifts. Thanks
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Toilet flange concreted into floor, replacement?

I've got a toilet on the concrete floor. The old flange has rusted and disintegrated at the hold down bolt slots. But the flange is actually cemented into the floor. I think my #1 option is to cut off ...
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Close up drafty gap between wood beam and concrete wall?

Lots of cold air coming through a variable narrow - about 1-2 cm (0.5 in) - gap between a wooden beam and the concrete wall in the basement (image 1 below). What can I fill it with? Worried about ...

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