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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41 views

Bases for anchoring 2" tubes?

Is there a base, similar to this simpson 4" 12-gauge ez base, that can be used to anchor a 2" steel tube/pipe? It would be exactly the same thing, but instead of a 4" square, it would be a 2" round ...
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65 views

Is my contractor guy doing a botch up job with repointing

Is my contractor guy doing a botch up job with repointing. Is it normal that it's drying out all cracked up like this and it's easy to crumble. They are only using the masonry cement type S and color ...
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29 views

Concrete cure time before laying hot asphalt beside?

Let's say I pour concrete sidewalks (6" thick, 4' x 8'), how many days should I wait to have hot asphalt laid right beside it (it would butt to the short side - 4') ? Was thinking of pouring the ...
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Manual methods to compact base for concrete?

I'm planning to pour a reinforced concrete pad and am looking for advice for how to compact the material underneath. A plate compactor would work - but can I get by without one? For instance, if I ...
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79 views

Wood rail on concrete steps

I currently have a metal step rail that is straight and spans three steps leading up to my front porch; it is the typical cheap metal railing you commonly see. It is at the end of its life, so my ...
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How much force can a concrete block fence and wood stud hold when installing a large shade sail?

I have a standard concrete block fence. I want to install a large 20 x 26 foot shade sail, or two 20 x 13 shade sails by screwing hooks into the wall, and the other end into my house via the studs. ...
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Rust-resistant 4x4 base for concrete?

I've read several reviews about this Simpson 12-Gauge E-Z Base that say that they began rusting after a few months. I wanted to use them, but they'll be used at a house next to the ocean, so I'm ...
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40 views

What Condition Can Concrete Be In And Be Recycled?

I have a basement slab that I'm going to be breaking up and sending to a recycler. Here's what I would like to avoid: The concrete being rejected at the site of recycling The concrete causing some ...
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Leveling sloped basement floor

We want to finish our (currently unfinished) 800 sqft basement. The current floor is concrete, in good condition, but slopes substantially toward a drain near the middle of the floor. I'd guess the ...
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485 views

Cement Recommendations for Fence Posts

I am planning to event a fence this summer and, given the size of ~ 250 linear feet, am looking for the cheapest option for cementing the poles. I am considering the use of metal Postmaster (...
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Is there an advantage to cutting joints in concrete rather than tooling them? [duplicate]

There were a few concrete driveways poured in my neighborhood this year. The contractor (largest in the area) took, what I always thought was, an unconventional approach to the joints. Typically, I ...
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New build next to existing slab

I want to build a new structure, with walk out basement joining up to an existing structure that has a slab foundation. Is this possible? what about the slab/footer for the existing structure, how do ...
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Reproduce/build 4“x4” steel bases using brackets?

I was searching for bases that will be used to anchor 4-ft x 4"x4" posts to concrete, and I saw this 12-gauge base for $18. I was also looking at these bases, but they seem a little flimsy. I'm ...
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237 views

Pouring Curbing On Existing Concrete

I recently removed the crumbling concrete curbing from around my front porch flower bed. This weekend I plan to create the form and pour a new curb for the bed. My question is: When I build the mold, ...
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240 views

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 replacing a rotted fence post that is slanted in a large concrete slab?

My fence line sits on a slab of concrete that separates my house from the neighbor's house. So far, I was able to complete two posts via extracting the post rot and replacing the post in the 4x4 slots ...
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Securely attaching a 4-ft 4“x4” lumber to concrete? [closed]

How can I attach/bolt a 4 ft treated 4x4 to concrete so it stands up securely?
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25 views

Installing shelf over block construction walls, plus more

I'm in Florida. Exterior walls are concrete block, then rigid foam insulation with randomly located wood furring strips, then a double layer wall covering (sheetrock covered by a layer of concrete ...
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What should be done about this concrete retaining wall?

At the back of my property there's a concrete retaining wall that separates my back yard from my neighbor's. The wall has several enormous cracks and is leaning, especially toward one side. I'd guess ...
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129 views

How to lay rebars for a 4'x4'x12" footing for a column?

I have three columns to support lvl beams under an addition and have a question about proper rebar layout for each (identical) footing. All specs are already checked by engineer, but there is one ...
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366 views

Best way to create a 2“ wide * 6” deep channel in conrete

I'm looking to run a PVC pipe from my new laundry room to the garage where the house main sewer pipe lies. How would a pro do it? I'm assuming a concrete saw and hammer drill will be in play.... ...
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Dry/cure time latex paint + concrete

Hoping you can help me out here, I mixed latex paint with Portland cement and 24 hours later they're sorta spongy. Definitely softer than I was expecting. Any idea what dry/cure time is gonna look ...
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57 views

Are there diamond cup grinder wheels that create a coarse, no slip concrete surface?

I bought a diamond cup grinding wheel for my 4.5" grinder to remove an acrylic stained concrete finish. The cup works great removing the acrylic stain, but it leaves the concrete highly polished and ...
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How to prevent water jumping from upper lintel to the lower lintel? [closed]

Water jumping from upper lintel to lower lintel and water jump to lower window (https://i.stack.imgur.com/u8FCr.jpg)
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3k views

How can I secure a loose iron railing on a concrete step?

My backyard stairs are concrete and the railing has been getting loose. I can now move it. What should I do to fix it? Do I need a professional?
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How to fill cracks in concrete slab inside house

My house had some foundation issues and the slab inside the house has separated from the foundation wall mostly all around inside the house. Some cracks are about 1/2" and I'm thinking in filling ...
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116 views

Do I need a subfloor or a Dricore subfloor panels on concrete (basement) for ceramic tile?

I'm trying to do the most intelligent, yet cost efficient method to tiling by concrete basement floor. On some sites, it states to use a subfloor, with the underlayment. Others it states to just ...
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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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1k views

How thick to pour slab over existing brick patio

I have an old brick patio, cracked in some places. I want to pour concrete over it and stamp the concrete with a texture. What is the thinnest I can go? 1 inch? 2 inch? I have 5000 square feet and ...
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106 views

What size fasteners should I use to mount fence bases to concrete?

We're anchoring several 4" x6" x 1/4" steel plates to concrete. They will be used for a fence. These bases need to be solid, but it's simply to separate one area from another (people won't be near it)....
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How do I make 10 gauge concrete mesh flat for trellises in a garden?

I'm going to be using concrete mesh for a trellis for my plants in the garden this year, and was wondering how I should make them flat, and bend them? I'll also be making tomato cages out of it, so I ...
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49 views

Can 3/8" Titen Heavy Duty Screw Anchor or hole 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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Knowing where to drill holes in steel plate?

I have a concrete floor and I made two holes to bolt a 1/4"-thick steel plate. The problem is that the steel plates haven't been drilled yet. How can I determine where the holes will be drilled in ...
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540 views

Can fill in a doorway opening in a foundation wall over the top of the slab?

I have an exterior service door on my garage I'd like to remove and wall off. The exterior of the garage is cedar siding. Replacing that and framing the doorway in is not the issue. My concern is ...
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559 views

Drilling 1/4" steel plate and concrete?

I need to drill (44) holes in (22) 1/4"-thick stainless steel plates. These are for 3"x3/8" heavy Duty Screw Anchors that will go through the plate and into the concrete. My question is: if possible, ...
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381 views

How do you call a concrete water catching thing under outdoor water tap?

How do you call this concrete thing under the tap on pic #1? Does it come prefabricated or is it made in place and, if so, how? Does it require connection to drainage system? I just need something ...
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145 views

Concrete an open hole with water pipes

I am looking to fill this hole and was hoping someone can guide me as to where to begin! these are our underfloor heating pipes and I've bought denzo tape to cover them. do i need to cover the pipes ...
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138 views

Dealing with water on a bad garage slope

The slab in our garage has settled toward the house, so whenever our cars are slushy the snow drains into the garage, where we walk and have things stored. We've been quoted about $4,000 to replace ...
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126 views

What's the standard way to mount wooden board to concrete wall?

I would like to put a wooden board on the concrete wall of my basement so that I can easily mount and dismount electronic equipment to the board with drywall screws without creating concrete dust. My ...
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2k views

Filling large hole in concrete floating floor

I have a big hole in my kitchen floor (inserting a beam and post to take down a load bearing wall), and I'm now left with having to fill this hole (after dumping around 300 mm of concrete on the post ...
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128 views

Running 4" PVC pipe through foundation wall

I am installing a radon mitigation system and my plan is to go off of the sump pump (I bought one of those covers that seals it up good and lets you pass a PVC pipe though it). The easiest thing to ...
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149 views

Cutting Concrete Block Wall

I have an outdoor BBQ Island that has a grill and refrigerator installed in it. The Island is made out of 5 3/4" concrete block with wood top and tile on top of that. Right now I have a A/V Receiver ...
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204 views

How best to repair 24 sqft dirt hole in concrete slab

I have a hole in the concrete slab of my foundation approximately 4' x 6'. The slab was originally poured directly on the dirt. The slab is approximately 4" thick with rough edges. The hole is ...
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What is the code-mandated overlap of welded wire mesh in concrete slabs?

I'm trying to find a code reference for welded wire reinforcement in residential concrete slab foundations. I though it was 6" overlap of the sheets, but some sources are saying it's more. Does anyone ...
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How do I identify if a caulk is water-based or solvent-based?

I have a new position in a hardware store, and I have customers asking me which caulking materials I have are water-based, and which ones are solvent-based. This is important for cleanup and tooling, ...
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What mesh to buy (and where to buy it) for gabion walls? [closed]

I'd like to build a DIY gabion wall. I've watched many tutorials, but I'm at a loss on where to buy the mesh the build the baskets from. I saw the mesh at the local Home Depot store and it was rusted, ...
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362 views

How to repair garage slab after plumbing brought in

The corner of the slab in my garage was removed to bring in plumbing. It's been backfilled with ~3 feet of dirt (slab was 2ft thick). What is the best way to repair this? I'm thinking I'll dig out ...
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419 views

Unable to drill into window lintel - what have I got wrong?

I'm new to DIY so forgive my lack of knowledge! Just bought a house and have ordered blinds to fit inside the window recesses. Fitting them involves drilling into the top of the window recess to ...
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How to prepare driveway for a pour in a narrow space?

I'm planning to make a concrete driveway by myself but planning to call a concrete truck for a pour. Problem is that my driveway is narrow and there is a hill on the right side. So the truck can't ...
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824 views

Can't Remove Diamond Grinder Cup

I have a grinder with a Dewalt diamond cup wheel I have been using to remove cosmetic issues on the floor of my basement before staining the floor. I am grinding the whole floor. I am about 1/2 done ...