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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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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What's the best ratio for sand-only concrete?

I'm making concrete countertops, so sand-only is the way to go to reduce voids in the forms. (I've done a half dozen samples). I've looked everywhere for mix ratios, but it's a weird request, and I ...
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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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Can concrete screws or the holes be reused?

So we drilled into concrete to bolt down steel bases with several Titen 3/8" x 3" Titen heavy duty Screw Anchor. I'll be replacing the base, so I will need to remove the screw, remove the base, and ...
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Is the electrical outlet by my kitchen sink supposed to be protected by a GFCI?

Aren't all electrical outlets near sinks supposed to have a safety reset switch? This one is for the garbage disposal but also has outlets for electrical equipment. Should I call an electrician or ...
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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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lead in concrete stains

I live in an old lake house built about 1938 to 1940 and the entire slab is concrete and stained red, I was told that lead was used in the concrete when the slab was poured. Is this true and how do I ...
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Fixing grade on concrete garage floor?

Here is a concrete garage floor that has a pitch and/or concavities that cause water to puddle inside the garage in the middle of the slabs instead of draining out the front. What are realistic ...
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Fixing Incorrect Concrete Leveler Application

I have a 400 Square Foot garage that has a lot of gouges in the concrete floor. I purchased some primer and Concrete Leveler in order to fix the gouges. I made a mistake and accidentally mixed 4 times ...
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How to remove a brass concrete anchor?

I have brass anchors like below in the concrete deck around my pool. Today, when I was raising the inner screw to install the cover, the screw was being very difficult. Trying to raise it, the inner ...
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Span between wood post for stilt cabin

I intend to build on Weiss Lake in AL. If I use 8x8 posts, can I span 10 ft with 2x10 or should it be 2x12 for the floor joists? Also was wondering for the foundation can I just sink the wood post or ...
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Concrete floor “too thin” for bolt and sleeve anchor

In our 100-year-old co-op building in NYC, I'm replacing a failed door stop with a heavier one to prevent our (very) hefty entrance door from smashing the doorway's marble. The door stop is intended ...
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Alternatives to bituminous membranes for concrete roof?

This new question is related to this old question I had previously asked, but from another point-of-view. I have a 13ft x 13ft rooftop made from plain concrete. It's leaking a bit, so I have to do ...
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Question Regarding Small Amount Of Grass Clippings Under Slab

Im going to be pouring my first ever slab in 30x26x4 dimensions. This is in North Florida with a high & dry sand base. I've removed the top layer of sod, then some... All with a flat shovel. ...
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Concrete Deck Falling Apart from Bottom

The concrete deck on my build-in-1937 house seems to be falling apart from the bottom. The deck itself is a 4.5 inch slab connected to the front of a brick house, and by two brick pillars in the ...
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Concrete mix too much Sand?

Hi Knowledgeable people, I've just dug up old fence concrete bases etc as fence blew down. Re done concrete bases, put posts up etc. And now I am looking at the concrete and am worried I've added ...
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Sunken area under bathroom cabinets

I'm remodeling a bathroom in a Houston, TX house that was built in 1969. After removing the cabinets on each side, I found that the concrete floor is approximately 2 inches lower where the cabinets ...
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How to cut wide shallow grooves in existing driveway slab

I want to create look of giant poured in place pavers on my driveway, using the existing concrete slab. Other than cutting all the way thru the slab and removing giant lines of concrete, then ...
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Can Thinset be used for covering cement driveway or garage cracks and small holes?

I have small holes and cracks in my cement driveway and garage floor. Can thinset be used to level these floors?
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Garage floor damp

Been reading on line for several hours now. I have dampness on my garage floor, note: it's about 8yrs old. If I put a box any where on the garage floor for several hours, there will be a damp foot ...
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Pouring concrete slab against 2 block walls and an asphalt driveway

I need to pour a small (~5' x ~5') concrete pad that will butt up against 2 basement block walls (A&B in the diagram) and my asphalt driveway (D in the diagram). I'm having some trouble figuring ...
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Second coat of Quikrete High Performance Self-Leveling Resurfacer

I've just poured a first coat of Quikrete High Performance Self-Leveling Resurfacer and have irregularities due to not pouring each bucket fast enough for the area I'm resurfacing (250 sf) and, i ...
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How to pour concrete over existing slab?

How to pour concrete over existing concrete slab if existing wood framed wall structure is there? And where to place the new vapor barrier?(I have an existing garage that I would like to convert into ...
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How can I remove a Carpet from concrete stuck down with black mastic/bitumen

I'm currently on restoring a property in the UK. The house was originally a Care Home built in 1987, and was built using standard commercial techniques at the time. The issue I'm having is, at the ...
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What are my options for plugging leaking gaps, cracks or seams from the back, in concrete walls?

What type of product are available to plug larger gaps in concrete walls, which are subject to hydrostatic pressure (e.g. wet dirt on one side)? Specifically I have an 18" tall retaining wall type ...
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How to mount these anchors?

In the mounted object (pull-up bar) there are 4 holes and in the kit there are 4 such anchors. One type has a metal sleeve, there's decent gap between internal bolt and the sleeve - it moves freely, ...
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Cheap way of attaching canning jars to a concrete wall?

Is there a cheap way of securely attaching a small glass Mason jar (like the one below) filled with water to a concrete wall? The jar doesn't have a top and it doesn't have a handle. I'll be using it ...
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How to install a wall-safe in a concrete wall?

Our walls are made of poured concrete. If I wanted to install a wall-safe, what would be the most efficient way to do that? When I added a vent to the bathroom I simply drilled a lot of holes next ...
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Rotating a concrete slab?

Is it possible to use a hydraulic bottle jack or similar to rotate a 10 x 12' x 6" a few degrees or about 5 inches? I have a recent pour not quite in position. 3/8" rebar throughout in a 6 x 6 grid ...
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Faux Concrete Wall

I really love the look of a faux concrete wall, and I would like to try it using joint compound and liquid cement colour. However, I'm a bit nervous to try it as I've never done anything like it ...
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What kind of caulk should I use to seal up spalling separating from steel porch ceiling

I'd like to do some temporary quick patches to prevent worsening rust and separation of spalling/stucco ceiling underneath a steel outdoor porch/deck. One on the first floor is kinda bad so will ...
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Nailing baseboards using nail gun on concrete wall

I’m installing some baseboards in a new apartment. I have glued some of them to the wall, but the results have been subpar. Now I’m wondering whether it would be possible to nail the baseboards to the ...
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Filling an outdoor drain with concrete to reduce standing water

I have a semi-outdoor drain that looks like this (I have removed the grate): The container of the drain is plastic, and there is a good 6 inches from the bottom of the drain to the pipe where the ...
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Only apply primer to concrete roof?

Our building has decided to paint a 13-ft x 13-ft section of the roof that's leaking (just a few drops with lots of rain). This roof has a fence since it's an "outdoor" area that we all share, so it's ...
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tools and material to seal and shape concrete rooftop lip?

How can I seal the concrete lip in this building's rooftop? This lip is about 5" wide, and I need to seal it. At the same time, it needs to be even with the rest (ie.it needs to look "square" ). ...
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Materials for building inexpensive light-weight large planter?

I've wanted to build a few large planters for a while now, and I've considered using concrete, wood, etc. I don't know what other cheap material to use. Initially, I wanted to make them out of pre-...
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Pros and cons of plastic/gravel shed bases vs concrete base

I'm going to have a 10x8ft shed installed in my back garden. I'm wondering if I should pay someone to put in a concrete slab base or use one of those interlocking gravel filled bases you can get. I'...
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Grading over asphalt and concrete walkway

My house is in a small city lot, it's a 1924 Craftsman with a concrete block foundation. On the north side of our house, between the wall and a fence line, the previous owner had asphalt over the ...
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Masonry bits dulling after 3-4 holes

I'm using an 18v makita hammer drill with a 3/16" Bosch blue granite turbo concrete bit to drill 2" deep holes into concrete-filled cinder blocks. With a fresh bit, it takes about 15 seconds to drill ...
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Setting tack strip in concrete

I would like to have carpet installed in the bedroom of my basement apartment which now has a concrete floor. I don't trust the carpet guy with this part because he suggested cutting corners and just ...
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Is this a properly done aggregate courtyard

A restoration company came out to repair our aggregate courtyard that they damaged while working on our home at their cost (which they should). We also had them extend the courtyard up to the front ...
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Can I cut into concrete floor in kitchen?

I need to run a gas line for a new stove. No room in the attic so need a 3x3 inch, estimated 12 foot trench in kitchen concrete floor. Wondering if anyone can offer advice. I'm just concerned about ...
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How to seal crevices in dry stack rock wall to prevent gopher activity?

I've recently had a retainer wall built in the landscape using the dry-stack method (see photos). Unfortunately, there has already been two occasions within past month of gopher activity behind the ...
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Is there a way to remove a root from under a walkway to bring it back to level without getting the walkway redone?

I had a disaster of a huge river birch tree in front of my house when I purchased it a year ago. I had it removed about five months ago, and the roots that ran through the yard were ground out along ...
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Make a hole deeper than the drill bit is long

The longest drill bit I have is 23.62 inches and apparently the thickness of the concrete I need to penetrate is 27.5 inches. I don't wish to buy another drill bit, is there a smart solution? The ...
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Best Concrete for Pet Headstone

I spend a lot of times on other areas of stackexchange, but this looked to be the best place to ask the following question. Feel free to let me know if it isn't. I'm going to layout exactly what I'm ...
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Installing Fake boxwood on concrete vinyl siding

We are trying to add boxwood on what I believe is concrete siding and I believe the only way to do so is by making a frame on the back wall that will have to be drilled into wall. Can I drill in the ...
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Advice on building a livable cabin floor on a concrete slab with insulation and plywood

I'm planning to build a 10 x 12 living space based on a shed design. The shed will rest on an existing concrete slab therefore my plan is to lay 6 mil polyethethylene sheeting and foam board ...
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Sealing coarse concrete rooftop?

I live in an apartment and I would like to seal a section of our rooftop with small leaks where water puddles (depth of puddle is negligible). The rooftop is "rough" concrete in the sense that it ...

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