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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151 views

What are these metal flaps protruding from my garage’s concrete sidewall?

I'm planning phase to re-finish my concrete garage floor with epoxy. I noticed around the base of the floor there are flaps of what is thin sheet metal painted over by the previous owner. What are ...
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house well pumps and softener system inside or outside workshop

I'm in the initial phase of laying out my 14x32 workshop and I need advice on whether to put the water treatment system and well pump outside or inside the workshop space. Here's what i currently have ...
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I’m needing advice on making garden spheres [closed]

I am trying to make garden spheres. First attempt was concrete..no success too much aggregate need a smooth mix. 2nd attempt was cement, much smoother but doesn’t come in quickset so Bunnings staff ...
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72 views

Why is there a hole in my slab?

We had a leaky pipe burst over the weekend. It seems that it had been leaking (slowly) for some time, so there's some water damage to the wall where it was located. In order to clean it up, I removed ...
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75 views

Concrete patio slopes toward garage causing water seepage

As indicated in inspection report photo my concrete patio slopes toward the garage so when there’s heavy rain water seeps into the garage. Is installing a French drain the only way to fix this or is ...
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180 views

How to glue HDPE plastic to concrete blocks?

I am using PL 500 to glue concrete bricks to each other. I need to line the back of the brick wall with some high-density polyethylene (HDPE) plastic tarps for water-proofing. The PL 500 says it will ...
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1answer
85 views

How to to bury 40 foot flag pole? [closed]

I got a 40ft flag pole that is schedule 40 pipe welded together every 10ft with couplers. My questions are: How deep I should put it? What diameter base? Can I use a Sonotube? The area I live in ...
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33 views

Is it possible to seal just patches of new concrete?

I recently had some interior drain tile installed in my basement. During this time I also took it upon myself to fix a few decent sized chips/cracks with a patching compound. The vast majority of my ...
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288 views

Pros and cons of painting basement walls in the unfinished sections?

I am about to sell a house I have been renting out. It just had some foundation work done and part of that was in an unfinished part of the basement. This utility room is large, has two finished ...
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118 views

Replacing an exterior screen door footer threshold to close gap

So I'm repairing issues on a home that was damaged in a flood about 8 years ago. A contractor had done all the repairs after the flood but I've found lots of corners cut and shotty work. The door to ...
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Leaving basement forms on permanently

I am having an addition built on my home with ~600 square foot basement underneath. Because one of the basement foundation walls is very near (~1 foot) from the original home foundation, the concrete ...
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1answer
49 views

Do I need to add a cardboard barrier around drain pipe before adding concrete

When I removed the concrete to add an extension on the drain, there was cardboard wrapped around the drain pipe. Before I add new concrete, do I need to wrap the pipe with a barrier (or card) again - ...
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409 views

How thickly can I install self levelling concrete to fix a tilted garage floor?

My garage floor is not level. The garage doors are level as I have held a spirit level up to each. One side of the garage door gently touches the floor (as desired). The other side has a gap between ...
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40 views

Concrete block water wall footing requirements

My wife and I would like to build a 6 foot high, 8 foot long fountain wall, using concrete cinder block that will then be covered with stone veneer. My question is regarding the footing. We obviously ...
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How to build up (or repair) this toilet outlet

I removed some bathroom tiles and much to my disappointment, the person who laid this out years ago did a horrible job and I’m now left with this mess to fix. I’ll be adding a 2 inch foam base (...
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Concrete over existing concrete in ground

I have a garden fence post which has some concrete on the post end in ground - had to push fence up as was tilting and now want to pour new concrete over the remaining old concrete in the ground - I ...
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1answer
155 views

Paver Patio with Backfill Settlement Around Block Foundation

Main Question: I've been told that a concrete skirt (8" sloped pad) below the frost line and attached to the foundation via rebar is a good solution for putting pavers next to a block wall ...
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132 views

Setting 6x6 posts in concrete

We are building a pergola-swing with two 6x6 posts as the main supports. The posts are to be set in a 12" diameter sonotube footing, 36" deep. I am unsure as to how much concrete to buy ...
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Filling in 1/4" wide sharp joints on cured indoor concrete floor?

This concrete garage floor is 3 years old. It has these quarter-inch wide sharp joints cut in every 12 feet. All settlement/curing cracks are in the joints, but I don't understand why they were cut ...
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499 views

Unfinished basement - options for exposed concrete wall in finished room

We're purchasing a home with a large, unfinished basement having a poured concrete foundation and walls. This home is in Minnesota, so there's a seasonal consideration with temperature and moisture. ...
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142 views

Repair holes concrete ceiling (not just masking them)

An old apartment, where dry wall was a thing yet. The ceiling is concrete, plastered and painted. There are many holes, from current and previous owners (different light spots installed in different ...
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2answers
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How can I mitigate water contact with a 2x4 screwed into concrete floor?

In my unfinished basement I am going to be installing some cantilever shelving along the walls. Basically using 2x4's attached to the joists, with a carriage bolt, and to the floor... likely using a ...
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1answer
157 views

How to (re)support basement stair stringers?

Recently I had some waterproofing done on my basement. This included removing some concrete that anchored/lifted the stringer's supports so that old concrete could be removed and new stuff poured (see ...
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1answer
667 views

How long does concrete need to cure before applying self leveling compound?

How long after pouring a thin layer of concrete (sand topping between .5 - 2" depth) should I wait before leveling with self-leveling compound? I'm mostly concerned that it should be done ...
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102 views

Large rocks and concrete vs. sono tube?

We live in New England where we have very large rocks all over our property. We are building a 16 X 22 shed and would like to use our rocks for our corner posts. Would it be structurally sound to ...
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134 views

Repair Hole in Cinder Block Foundation

I had a geothermal furnace put in recently, and with that, the old heat pump was removed. The electric from the heat pump was run through a hole through the foundation to the panel. The hole is about ...
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Filling expansion joints before self-leveling concrete?

I am adding self-leveling concrete to my basement flooring. I have expansion joints which are currently filled with a joint compound. How would I fill in the expansion joints so that I can cover the ...
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3answers
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Flooring Subfloor Condition How smooth it has to be

Just tore out 800 sf of ceramic tile for installation of laminate flooring. I've spent 2 days on a hammer drill trying to wear down the 30 year old thinset, but there are still quite a few spots ...
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1answer
22 views

What is the best way to break concrete under existing framing (2x4) to install plumbing?

In the picture below I have selected the drain pipe that I need to install How do I break the floor under that 2x4 used for framing? Fist I will have to cut it out but after that what do I use to cut ...
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1answer
30 views

Generic water-based polyurethane for concrete desk?

I recently made a desk with a concrete top. It was a little rough so I smoothed the top with a liquid mix of just cement and water. I'm now preparing to finish it. I have a pot of water-based ...
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1answer
92 views

Is there a good way to add a rebar-type concrete encased grounding electrode AFTER the slab is in?

My workshop project has a 1200 sqft slab with 40 cu-yards of concrete! and 900 lbs of rebar in it. Unfortunately, I didn't set up to put in a proper concrete encased grounding connection... is there ...
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1answer
69 views

When to Repair Versus Replace Concrete Slab?

I am a first-time homebuyer and purchased an older home in the Northeastern US. While I've found great infomation here on my many DIY projects, I have not been able to determine whether or not my ...
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94 views

Strange concrete pad ringed with bricks in basement

I'm developing a Victorian flat (UK) the moment and there's a room that I wanted to clear out but there appears to be a load-bearing support beam with a concrete support pad at the base...I'm ...
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2answers
75 views

Leveling settled concrete pad

I am looking to convert an old garage into a workspace. The total concrete area is about 20ftx22ft, and has one seam down the center. The pad on the north side of the seam is level. The pad on the ...
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115 views

Building Gate between house and garage with concrete slabs

We are fencing our backyard for the safety of our autistic son and what we have left is a gate between our house and the garage. They do not line up evenly and there are concrete slabs and rocks in ...
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1answer
62 views

Should I build a segmental retaining wall on top of a grade beam with piles?

80 foot long retaining wall that ranges from 4 feet tall on one end to 12 feet tall on the other. I am planning on a segmental wall made of Versa-Lok "Bronco 18" blocks - 1200+ pounds each. ...
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1answer
111 views

How many concrete piers do I need to support a tiny house (12x28 and 20feet high) [closed]

I need help, I am building a tiny house, I am not sure how many concrete piers do I need for a 12x28 tiny house and that will be max of 20 ft high thank you!
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1answer
102 views

How to remove high ridges on concrete flooring

I ripped up the carpet in my basement and I have some good curling (approx 3/8”)that I need to fix before I lay down new flooring. I Looked at renting a wet grinder from HD but they are immensely ...
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22 views

What are thickness minimums and best type of concrete to fill floor dips?

I have a large room (~775 sq. ft.) with concrete floor. Prior owners had converted a garage to living space. I need to level the floor before laying laminate. For the final leveling, I'm planning ...
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6answers
5k views

Is it normal to use a grinder to finish a new driveway?

Yesterday we had new concrete pads poured. We expected pour-day to be the last day. I saw them out there finishing, but when we went out that evening after everyone had left, it looked half done. ...
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1answer
87 views

Galvanized fasteners into exterior concrete - good enough for 20+ years? Or stainless?

Planning to attach pressure treated wood sleepers to a concrete patio and put deck boards over them. I'm trying to decide on what fastener material is best to attach the sleepers to the concrete. This ...
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2answers
1k views

Fixing slope on concrete patio - grinding a drainage channel?

My house has a concrete patio (about 16x16 though its 5-sided) which is not sloped properly for drainage. In some sections it seems basically level, in others (near the doorway of course) it actually ...
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1answer
36 views

How to glue wood to smooth exterior concrete?

I am planning to put treated wood sleepers (2x4s) over a concrete patio and attach deck boards to the sleepers. This is an exterior area which gets plenty of sun but we're in a wet climate also. I ...
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30 views

Concrete for making concrete molds

I am trying to make some concrete items such as trays, vases, bowls etc. Can anyone please advise on recipes/ratios for this? I would like to make these in white, black and grey and want a smooth ...
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3answers
340 views

Best way to fill gaps between lumber and masonry or rocks

We have built 4x4 retaining walls around existing rocks and concrete that we were unable to get rid of. The idea was - and is - use something fill the gaps between the lumber and the rocks / cements. ...
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1answer
54 views

What to use to fill a small HOLE in my concrete patio

I have a 4" x 4" x 6" deep hole where a post had been on my cement patio. The post rotted out and now I want to fill the hole and then place a post holder in that same spot. What do ...
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3answers
131 views

How to properly clean a rough concrete floor?

I have an old house with an uneven concrete floor that occasionally needs to be cleaned. The basement floods during a hard rain due to some landscaping issues that I'm working on. I've cleaned it with ...
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189 views

how to repair garage concrete threshold

I have a really badly cracked concrete floor at the garage's threshold, looks like the previous owner just slapped concrete on threshold, and it has broken in pieces. What is the right way to fix it? ...
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Crack in concrete block garage wall

I have a 2 story garage with the rear being cinder/concrete block walls. I just noticed this crack. Havnt lived here that long so not sure how long its been there Is this something to be concerned ...
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1answer
74 views

Patching gap in drainage channel

Our property includes a dam with a storm overflow. I've discovered that the drainage channel, 50 years old, has started to slide apart, leaving a 2-3 inch gap in two places. When water drains, it ...

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