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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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Fixing void on face of concrete steps

My front steps are crumbling on the top. I wondered what I could do to fix this? Thanks in advance all!
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How to level this area of my garage?

I have an area of my garage that is lower and sloping towards the house. When the car is wet or covered in snow, it melts and runs down into this area in front of the stairs and makes a mess. Ripping ...
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Cinder block wall fasteners

Good evening I'm installing an IKEA pax wardrobe onto drywall attached to cinder block. I've successfully used a tapcon in 5 of the 6 attachment holes. The 6th tapcon gets 90% of the way in and then ...
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Need to add traction to existing polished concrete surface

My front porch is polished concrete, and gets slippery in the rain. What is the best way to add grip/traction to an existing concrete walkway? More info: My front porch is part of the house slab, ...
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How do I add grip to concrete sealer after it is already applied?

Last fall, we had H&C Colortop Solvent Based Concreat Sealer 250 applied to a textured concrete driveway and walkway. It look amazingly better and have gotten many complements from the neighbors, ...
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Mount cement counter top

I made an outdoor cabinet out entirely out of cedar. The counter top was made of cedar 1x4s originally but that proved to be a bad idea at preventing water ingress. Since then I've made a custom ...
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Stone, Brick, Concrete. Which material is the heaviest per cubic inch?

I'm building a mobile fence and and have limit space to hold down my poles. I wanted to know what is heaviest material per cubic inch. Stone, Brick, Concrete... or What? This is the limited space I ...
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Concrete post base wood too tight

I'm using the Simpson PB66Z "Galvanized Post Base" to attach my pressure treated 6x6 to the footing. The wood seems to be slightly too large to fit such that the bottom of the post rests on the metal. ...
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Self leveling showing popped bubbles and small chunks

I did self leveling concrete in my basement as below But some spots showing small holes, potentially from popped bubbles And some have little pieces like chunks not mixed well I plan to install ...
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How do I better secure a loose lag shield in concrete?

I have a concrete hole that was drilled a little bit bigger and the lag shield anchor is a bit loose. How do you tighten it? Insert paper or wood?
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How much material would it take to cement a 1 mile driveway

How much material would it take to cement a 1 mile driveway I would like to know, in pounds, how much material it would take to cement a driveway, exactly 1 mile in length, how many pounds of sand, ...
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What to do with baseboard for this basement with concrete box?

This is in my basement and I plan to install wood flooring. But this is what in the bottom of the wall: It is like a box 2x2. Previously I had baseboard on top of the concrete box running along the ...
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Minimum length of concrete fasteners to floor and ceiling to attach a wall?

I want to attach a wall, of 7-9.2cm thickness, on ceiling and floor. Drywall with wood frame done for living apartment in a block of flat: 42mm x 66mm woods form the wood frame where 13mm drywalls ...
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Basement concrete leveling issue for click lock hardwood flooring installation

I am prepping my basement concrete flooring to install click lock hardwood. The problem I saw is that there is a spot in the corner with this: I am not sure what it is as it looks like a cap to cover ...
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Cutting out beam pockets

Guys that were pouring concrete did not form beam pockets so now i have straight walls with no beam pockets. How can I possibly cut the beam pockets out now? I believe the size is 8 1/2 by 12 1/2.
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Seal a 1in drilled hole in concrete block

I need to drill a 1 inch hole in a basement foundation block wall to pass a 1/2 emt conduit through. How do I seal the gap afterwards to pass inspection, prevent mice, insects, rain and drafts. ...
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Large concrete patio poured against the foundation - should it be tied to the foundation or not?

Over a year ago I had a large concrete patio (24' x 26') poured. This concrete patio butts up against the foundation of our home. I'm unsure if it was tied into the foundation of the house or not, ...
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How to fill a narrow crevice around my toilet waste pipe with concrete?

When I replaced a toilet, I discovered that my toilet flange was not actually secured to my concrete subfloor at all and had come out of level, causing a leak between the bowl and the floor on the ...
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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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Soundproofing garden

New houses have been built at the back of my house and they are very noisy. I want to build an outside wall to get some sort of protection. I currently have a standard fence panel and a Hawthorn ...
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Can I drill into basement concrete wall to hang a mirror?

My basement is unfinished and I have a large concrete wall. Can (should) I drill some small holes in the concrete to hold up a mirror or two? Are there any serious downsides to drilling into the wall ...
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Resealing or repolishing interior concrete floor?

I have a concrete floor in my apartment. It is somewhat shiny. When cleaning up after a pet, I used an abrasive scouring pad on it, and looks like I took off whatever layer is giving it shine: How do ...
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Can tile or click-lock wood be installed directly on rigid insulation foam

We would like to insulate a concrete condo floor and for height purposes (already low ceilings as well as not modifying fire doors) we cannot add much material to the concrete pad. Typically in this ...
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Patching hole in cellar floor when water seeps up from ground

I had two holes in the poured concrete floor of my cellar. I was planning to fill both holes. So far I have only filled one because I ran into a problem with the other one. How I filled the first ...
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What is this pipe?

I discovered a 12" diameter concrete pipe traveling vertically from the basement to the attic of a one story house. The pipe is lined both internally and externally with metal. I would like to know if ...
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How can I prevent silt from clogging my yard drain?

In my concrete back patio, I have a standard 4" square drain cover which allows water to enter a sewer pipe about 6" below. The issue I have is that the sides of this hole are not covered in cement ...
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Minimum Concrete Thickness Over PVC After Rough-In

I just has some plumbing roughed in for my basement. The plumber did an okay job but for some reason routed the drain pipe for the sink under the area where my shower will go. This would't normally be ...
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water drainage WHEN IT RAINS

what is the best way to raise,my cement sidewalks level a couple of inches for better water drainage 2 1/2 feet W X 20 ft length
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Mounting 2'x3' Glass whiteboard, drywall over concrete

I am trying to mount a 2'x3' glass whiteboard that weighs ~14lbs to the wall in a new condo. Best I can tell, there is a concrete barrier very close to the surface drywall, and it isn't giving me ...
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Weak concrete mix suitable for patio substrate and similar work

I'm having odd difficulty in tracking down an answer to this question. Searches for "weak concrete" tend to cover weak sand/cement mixes (but no gravel), typical strong sand/cement/gravel mixes - and ...
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Should I be concerned about rust on a post in my basement?

How long do support posts last? Any reason to be concerned with rust on them? Seem to be working fine.
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How do I attach a wooden post to existing concrete steps?

Background At the front of my house I have concrete steps leading up to the porch. Having just rebuilt the porch, I've discovered that they are actually concrete veneer over brick. It appears that ...
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Removing fibreboard plinth from concrete floor

A previous owner of our property fixed a fibreboard plinth to the concrete floor under our kitchen worktop to raise the height of the dishwasher there; I'd like to remove that plinth to fit a taller ...
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Crawl space water

We have had 3 straight days of rain and I noticed a small amount of water seeping under scrawl space wall. My space has a vapor barrier and is in decent shape. I did notice the finder blocks on frame ...
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Medium-term repair for spalled foundation with exposed mudsill

I have an old house (built in 1946) near the ocean. The foundation in the back has spalled off, exposing the mudsill in some places. The worst spalling is 4" deep - you can see the mudsill and a few ...
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Normal working time for Quikrete 5000?

I'm having a hard time finding the "working time" specifications for Quikrete 5000. The Quikrete 5000 Data Sheet says "higher early strength", but I'm only assuming that means it will achieve a ...
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Least invasive way to find foundation footings under basement slab?

For a 100-year-old brick house (two-flat) in Chicago, I'd like to find my foundation footings so that I can plan in-floor heating. What's the least invasive way to do so? I'm imagining drilling ...
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Render internal wall after doorway brickup

As per the picture, I have a room with a bricked up wall. All the walls are concrete. The doorway has been bricked and covered with what I believe to be cement. So far I have sanded the doorway with ...
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Water puddle in backyard causing leaking in garage concrete wall

This is what I saw in the backyard of a split level home after a light rain The water was there due to overflow from gutter. I can clean the gutter but the puddle situation must be fixed as it will ...
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Pier foundation and water table issue

I am in the process of building a small (14x14) log cabin in the woods on a pier foundation: After marking the perimeter, I began excavating the soil and dug to below the frost line (36"). The plan ...
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Bistro lights for wedding structurally sound?

Hey guys and gals, 1st question here. I’m having my wedding in my backyard and my fiancé insisted on having a light canopy of bistro lights in my back yard. Of course I obliged, but the quotes I got ...
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What went wrong with this wall, and how do we fix it?

My friend's condo was built in 1960 and renovated before she bought it, in 2010 or so. Not long after she moved in, a chunk of plaster on the kitchen ceiling fell off, then a little later the same ...
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Should I resurface my concrete before laying epoxy on a garage floor?

I'd like to lay down epoxy garage flooring. The concrete in my garage is still original (50+ year house) in relatively good shape. Will the epoxy fill in minor (1/8" or so) imperfections which are ...
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Suitable work surface and tolerances for casting concrete countertops

I'm casting 2" thick concrete countertops using ¾" melamine forms/molds. The largest piece is about 26" square and the longest is about 55" x 11". I thought I'd make a large flat work surface for ...
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Installing vinyl siding over concrete foundation walls

A while back I tore down a deck and did a bit of landscaping, exposing quite a bit of the concrete foundation of my house. I have vinyl siding above and around this portion of concrete but would like ...
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Is there enough time to pour 40 sqf 4" slab with 60lb bags of premixed concrete if working alone? Any hints?

I am planning to pour 40 square feet of 4" slab to support light shed. I was thinking of using 60LB bags of regular premixed concrete (not fast set). I figured that getting it as ready mix in a truck ...
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Avoid rust where railing anchors into concrete

If you have seen railings anchored into concrete, you may have noticed how they tend to rust at the junction between the railing, the concrete and the air. Here is a photo of a pretty typical example: ...
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Building a 'Concrete' Ramp, Concrete Mix

I'm trying to build a ramp as shown in the picture below. It will be above a concrete floor connecting to another concrete floor, so I suppose it doesn't have to be very strong as it will not be load ...
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When calculating rebuilding costs for insurance purposes, should foundation replacement be considered?

In this question I asked at what temperature a foundation becomes unusable for rebuilding purposes. The answer was a fairly low 570°F (~299°C). A house fire that burns a structure to the ground would ...
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Concrete Pavers with Scenes

I was given some concrete pavers that have scenes molded in them. I would like to paint them so that the details in each block can be seen. One is of an eagle and another is the American Flag. How do ...