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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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How to clean cement smear from concrete?

During a walkway pour some concrete residue smeared on the existing landing pad and entrance (both old concrete) causing a dirty appearance. Is there a way of cleaning a smear of concrete from old ...
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How to pour concrete for curved walkway to prevent cracking?

The front edge of my home slab is about 37 feet from the street. There is a 12*4 feet landing pad next to street and a 7*4 area next to front door. Originally there was a 33*4 rectangular walkway ...
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Foundation next to salt water, on bedrock

I have a cabin next to the salt water and want to build an 8' x 8' extension. The water is 16' away from the cabin at high tide. The cabin is actually on a Tickle that leads out to the ocean...well ...
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Masonry drill bits

I have used 2 different brand of masonry bits. I can not even drill one hole before it becomes dull. I used both a regular drill and a hammer drill. Is that normal? Andy
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Can faded stamped concrete be stained to match rest of patio?

Stamped concrete patio has severely faded - assume from sun and water runoff from canopy? Rest of patio and back steps looks great.It has been sealed several times over the years. How do we restore ...
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Domed concrete floor (garage) needs leveling

I am about to replace a 14ft wide garage door. The concrete floor is domed in the centre of the doors width. The mid section of floor is roughly level for about 6 feet wide but falls away each side ...
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How to deal with a small concrete patch in hardwood floor install

I am installing 3/4 inch oak throughout my first floor. The install is over the original pine, which sits directly on the joists. I put 1/4 OSB over the pine (due to a number of factors 5/8" wasn't ...
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Q: What is the safest way to clean soiled concrete for tiling in a small kitchen?

I'm planning on tiling my kitchen floor which is bare concrete. However, I did a water test on the concrete and it's soiled to the point that water beads up on the surface. The floor most likely needs ...
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Concrete sinking in front corners of attached garages

I was looking at buying a house and the concrete in the garage sunk about 2" on each front corner, leaving gaps under the garage door. I then realized that at least 5 houses on the same street had ...
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How to increase part of existing internal concrete slab by 300mm

I have a property with a 150mm (6") thick concrete slab throughout. The slab has a step down of approx 300mm / 1 ft, running the width of the house. This means the front rooms are at a higher ...
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44 views

Adding a indoor concrete ramp to existing concrete

My plan is to build a mold (by building a shallow wooden box, made to support putting a sheet of aluminum inside to create the curve) and fill it (upside down of course) with concrete to create what ...
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Level a concrete pour 11' x 14'

How best to level a concrete pour enough to finish with engineered floor planks. The new pour adjoins an existing pour on two sides and is 1/2" to 1 1/2" out of level in places. The highest ...
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Drilling in concrete and hitting something hard - what are my options?

I drilling somewhat deep holes (inch and a half) into concrete and I'm hitting something hard in two out of my four holes. I'm fairly sure it's not metal I'm hitting and I'm wondering how to proceed. ...
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How long should concrete set for a post before I perform additional work?

I'm installing a gate for a fence around the house and have set wooden posts in concrete foundations for support. I'm using Quikcrete and the bag states that I need to wait at least 24 hours before ...
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Laying bricks/blocks into a concrete slab during the pour

It is common practice to put a brick ribbon around a newly poured concrete walkway. Is it possible to put decorative designs, using bricks, in the middle of a concrete slab as it's poured? How do I ...
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Is a roofing delivery truck likely to crack my driveway slab?

I am having shingles delivered. The truck weighs 62,000 lbs, will this crack my concrete slab driveway? Also, they plan on a dump truck in the driveway to throw shingles from the roof. I am not sure ...
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1answer
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Is this a drill bit for concrete?

What kind of drill bit is this? Can it be used to drill a hole in concrete? EDIT: after the accepted answer provided me with some details I found out what it is. Details here, on page 5. And the ...
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Can I paint my floor in two stages with epoxy?

We just redid our basement floor and I am considering epoxy paint (with texture flakes) for the floor. I prefer not to move everything out again for this process, so I'm considering moving everything ...
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Do you include the concrete that squeezes out under the frame as part of the depth of the concrete driveway?

We had professional concrete contractors pour a new driveway. We asked for five inches depth. When I measured at the side of the driveway I found concrete had squeezed out under the frame. Do you ...
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How to lay tile backer board on sandy cement floor

I've just removed some super old tiles from my bathroom floor. Most of the now exposed concrete is in decent condition. However the cement is a little soft / sandy around the drain area (it's an old ...
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3answers
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How can I remove old tile mortar from a concrete floor?

I'm about to tile my bathroom floor but the floor is concrete and it is not flat. It still has the thinset trowel markings on certain areas and they are not in the same direction. How do I even out ...
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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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rainwater entering doorway below driveway

I have converted garage with door way about 4 inches below the driveway. Previous owner left this issue for me. My questions is i want to cut into concrete to create drainage system, french drain ...
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Possible Leak In Concrete

I recently noticed that our outside wall has a wet looking spot around the faucet. I tried looking in the wall at the pipe (from the unfinished basement), but I couldn’t see very far because the ...
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1answer
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Approaches to level a concrete floor with shallow pipes

I have a situation very similar to How to level a section of raised concrete floor?. Except, in my case the obvious solution of grinding the high point is not possible. In my hallway I have a raised ...
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1answer
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How to build a concrete patio

I am trying to build (extend maybe a better word) the back patio like this where the red box is where I want to add a new slab of cement. Like shown in the picture, the dimension is 18ft by 5ft-5in. ...
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1answer
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How can I remove paint splatters from sealed decorative concrete deck?

I have a custom concrete pation & pool deck that is textured / painted to look like wood. It is also sealed. Recently I had the coping on my pool fixed and the guy did a great job but left quite a ...
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1answer
63 views

Temporarily marking up a polished concrete floor [closed]

I live in a house with polished concrete radiant-heated floors. They're not polished to a shine, but they do feel very smooth. I' d like to apply a decorative pattern to the floors with some sort of ...
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1answer
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Curing concrete in freezing temps

I need to pour a few cubic feet of concrete to make a new threshold but the weather forecast indicates temperatures in the low 20s F. Is that bad for curing concrete?
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How to lift/raise/repair a segment of concrete slab?

I have an 8-year old concrete slab around my pool. One slab has sunk by about 2 inches on the short side. The slab measures about 6 feet by 3 feet by 4 inches. It rests against the pool structure on ...
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1answer
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Pouring concrete on top of old chunks and other larger rock

I need to fill in alot of area next to the driveway and have access to alot of rock and some old concrete. Can I port 4-5 inches on top and let it bleed into the crevaces or am I better off just using ...
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2answers
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How thick should my concrete walls be?

I've been drafting a house for a couple years now and through many iterations I discovered one of the biggest flaws in how I was drafting was in not knowing what I would be building the house out of. ...
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1answer
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Will using a paint or sealer on a concrete floor damage it?

I live in a 1st floor flat (relatively new build) that has concrete underneath the carpet. I'd like to remove the carpet and treat the concrete and have concrete floor. The floor seems pretty solid ...
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Can't make progress with a hammer drill into 60 year old concrete

I have a Ramset Hammer drill with the Hammer drill option set, speed set at low [1], and a new 1/4" masonry/concrete bit. I can't get more than an 1/8" in about 15 minutes of incremental drilling with ...
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How to install a safety barrier-post in garage, between house and vehicle

On the other side of the wall, in front of where my vehicle is parked, is my bedroom. Would like to install something similar to what you would see at store fronts that have parking spaces near the ...
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1answer
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Footings for loft

I put 2×2' pad with 5/8 rebar 16 oc both ways is that sufficient for 4×16 pearlam sitting on 6×6 posts every 8' with 2×10 joists 16 oc for a loft as an office in a Warehouse
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Diameter of an 11' foot high, 3" (2&7/8) steel post footer hole

I know that the general standard for post footers is to make the diameter of the footer hole 3 times wider than the post itself. However, I want to make sure that even in an 11' foot post (which seems ...
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Stamped concrete is dangerously slippery

We had a contractor put in a new walkway of stamped concrete. He applied a wax coating to protect it. Now, whenever it snows the combination of snow and wax makes it extremely slippery -- like walking ...
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1answer
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Do I need any kind of separator / release agent when casting concrete in shuttering plywood forms?

We'll be casting my first concrete countertops soon. We already talked thickness, reinforcement and sealing with manufacturer of concrete mix we will be using (great guys!) so on that part, we feel ...
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1answer
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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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3answers
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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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1answer
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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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1answer
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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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1answer
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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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1answer
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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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1answer
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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, ...