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.

Filter by
Sorted by
Tagged with
0
votes
0answers
24 views

Should newly added house steps feature insulation?

I’m building steps from my house to the garden, where previously there was decking. I’ve already poured concrete for the steps base, leaving underneath a layer of MOT sub base which I compacted. Plan ...
8
votes
1answer
1k views

Why did I get concrete honeycombing

I mixed 1:1.5:3 by hand and using a bucket. I mixed the concrete on a plastic sheet but on hard soil not a concrete surface. I am not sure what I have done wrong. The portland cement bag suggested 1:4:...
0
votes
0answers
18 views

Wall mount desk to wall

So I have a small room that I have my pc setup in. Unfortunately this means the pc is crammed up against the bed and desk legs. It is against a concrete (airated I believe) wall. I want to use L-...
0
votes
0answers
32 views

How to improve cooling in a room/Cool a concrete wall?

Im on a 2nd floor room, it has big front windows and a small one on the side, I am using my computer/full setup on the corner of the room, where beside me is the window wall, but since im in the ...
0
votes
3answers
116 views

How can I move this water supply line so that I can frame a wall?

Our main supply line enters through the basement floor. I need to move it about 2-3 inches out of the way because it's blocking a corner of the bathroom I'm framing in. Supply line is PEX with ...
1
vote
2answers
69 views

Does a carport slab need expansion joints at interior piers or the perimeter?

I'm planning to pour a pad into an existing open carport / garage area that has mid-span supports resting on poured piers and a foundation wall going around the outside. I'm planning on digging down ...
1
vote
1answer
85 views

Should I let my contractor drill and set rebar dowels in my concrete storm shelter to secure a concrete patio that will be poured around it?

I want to pour a 16 x 22 patio from my house foundation (slab) and encasing 3/4 sides of the storm shelter. The contractor states he will drill and place rebar dowel every 2 feet into the foundation ...
3
votes
1answer
63 views

How to repair a built in hole in concrete front steps

We just bought a house in Minnesota. The front steps are concrete I believe and they are built with what seems to be small glass block windows or tiles in the top that leads into the basement, letting ...
3
votes
1answer
94 views

When setting fence posts, does the post need to go to bottom of the concrete?

FYI, Previous answers were 50/50 (going back 10y). WHEN SETTING A POST IN A ROUND CONCRETE FORM: ..1.. Some answers said the post must touch gravel at the bottom for drainage, ..2.. the other 50% said ...
0
votes
1answer
33 views

How to seal concrete panel garage

I have a garage made from cast concrete panels. The gaps between the panels and at the bottom have clearly had an attempt at waterproofing in the past but it has failed, so now I get standing water ...
0
votes
0answers
28 views

Mixing Exposed Aggregate and Stamped Concrete - One Pour or Two?

I'm doing research for a project I'm asking for bids on and I'm wondering how much you can mix decorative concrete treatments. I want a large exposed aggregate patio, but in order to break up this ...
6
votes
3answers
2k views

How can I visually conceal a crack in my concrete driveway?

There is a crack on the sidewalk and front of my garage. I want to repair or cover the crack so that everything looks even and uniform. Any ideas on how to approach this problem? Thanks in advance.
1
vote
1answer
36 views

Do I need to remove all carpet adhesive residue before using a floor leveler?

We have a slab foundation on our place. The previous owners put down carpet with pad and there's a fair amount of glue and pad residue on the concrete, as well as some paint overspray. We'll need to ...
0
votes
1answer
51 views

How to prepare a rough concrete slab for pavers

I tore my old wood deck out and am planning to lay pavers on top of the concrete slab that was beneath it. I'm following the instructions here, photo below: The inner paver bricks will have a layer ...
2
votes
1answer
59 views

Correct transition for pvc conduit to liquid tight flexible conduit on a concrete slab

I am installing conduit for a hot tub. I have conduit coming up from underground at the edge of the slab and I wondering how to transition it to liquid tight flexible conduit on top of the slab. The ...
0
votes
2answers
67 views

Does a small concrete slab need control joints?

I’m pouring a small slab for some pool equipment. It will be 4’x8’x3.5”. I expect little to no foot traffic, just a heater, pump, and chlorinator. (Mabye foot traffic just when adding tablets) Do I ...
0
votes
0answers
41 views

Patching a hole in wall for reuse

I was trying to hang an IKEA Kallax shelf on the wall but ended up tearing away part of the wall. I am not too sure what kind of wall this is (in a ~1960s apartment building), first layer looks like ...
1
vote
1answer
45 views

The best way to fix a deteriorating foundation?

I've got a corner of my foundation that is crumbling. I tried concrete vinyl patching but it only lasted few years and got worse. Here is what I used before: I am not sure what else to use, other ...
3
votes
1answer
141 views

Should concrete footers be separated from a concrete slab?

I am going to build a pavilion over a concrete slab and I am wondering what would be the best way to set up the footings. I was planning on using steel column bases set in 12 inch sonotubes. There ...
0
votes
0answers
43 views

What material should go between old and new concrete?

I recently poured a slab for a hot tub and I want to pour additional concrete around it for a walkway. I want to keep the new concrete separated from the hot tub slab in case they heave at different ...
0
votes
3answers
105 views

Longevity Stamped Concrete vs. Normal Concrete?

I have a backyard and have a planned 950 sq. ft. patio to be poured. In the past, I've had normal broom swept concrete for a patio and this time I'm thinking of going to a stamped concrete with ...
1
vote
0answers
52 views

How can I decommission a copper pipe through a concrete wall?

A previous owner of my house installed a 1/2" copper tube gas line through the basement wall beneath ground level to install a grill, which an owner after him removed, leaving the line buried. I ...
1
vote
1answer
63 views

setting post in quikrete in a plastic planter

I would like to set a 4x4 post (10 ft) in a tall, heavy plastic planter. I am using 2 50 lb bags of Quikrete. It says to just pour the concrete in, set the post, and then pour about a gallon of water ...
0
votes
1answer
46 views

anchoring a beam made from dimensional lumber to concrete piers

The rim joists of a shed will sit on two horizontal beams. The beams need to be secured to concrete piers with some kind of galvanized tie. Something like the one in the picture. The beams will be ...
1
vote
3answers
84 views

How to fix out of level foundation walls

I am building a detached two car garage and just had the footings, foundation walls, and slab/apron poured. After the walls were poured, I thought that everything was hunky dory as the contractor ...
0
votes
1answer
54 views

Concrete slab for a hot tub

I want to lay a 9 x 9 concrete slab for 125 psi hot tub how thick do I have to make it? And what kind of base should I use?
0
votes
0answers
14 views

Tiling back patio over concrete, with slant towards drain

We have a small 9' x 9' concrete back patio that has a drain in the center (see pic). The cement is angled towards the drain, so when it rains there actually isn't too much water build up, which is ...
9
votes
7answers
2k views

Will old anchor holes in a concrete slab reduce its useful life?

An impaired driver jumped my curb and ripped my square mail post out of the sidewalk concrete that it was anchored into. The bolts were all ripped out of the concrete. Bolts went through the metal ...
0
votes
1answer
39 views

Proper thickness for concrete “flagstones”

I've seen some videos showing how to make "flagstones" out of concrete. The general process is to create a moulding on the ground (usually the grass is dug out so the dirt is exposed), using ...
5
votes
2answers
480 views

Concrete sealant vs spraying to cure a concrete slab

Yesterday I poured a 9ft x 9ft x 5 inch slab and I am wondering if spraying the slab with water is better than using cure and seal during the curing process. I have also seen some people build a ...
0
votes
1answer
43 views

How do I fill the holes in concrete to reattach a curtain rod?

I am very, very new to this DIY thing, so be gentle. A bedroom curtain rod popped out of this concrete wall with a surface material which I don't recognize. The rod holds fairly heavy blackout ...
0
votes
0answers
12 views

Door threshold/sill from unfinished concrete garage floor

I have a detached garage with a bare, unfinished concrete slab. The side door has a step down to grade. The old threshold was so rotted when we moved in, I couldn't tell you much of anything about it. ...
0
votes
2answers
86 views

Why not always use a stronger mix ratio for concrete?

A lower ratio of sand and aggregate to cement will lead to a stronger concrete. What are the reasons for using a 'weaker' higher ratio mix? Is it just cost?
0
votes
0answers
13 views

Self Leveler Over Thinset Over Concrete

In the kitchen, I've removed the tile and would like to install new tile. The floor still has much thinset over concrete. The concrete has hydronic lines for heated floors, has metal mesh on the ...
0
votes
0answers
36 views

What is the best proportion sand/cement to do pavers?

I want to make my own patio using pre-made molds. I would like to know if I can use only cement and sand. Will it be resistant or do I need to add aggregates. What should be the ratio?
1
vote
1answer
53 views

Flooring Options for Basement with Uneven Concrete Slab

Working on a basement remodel and getting to the point of needing to figure out flooring. Unfortunately, the concrete slab is generally uneven. I had a company come in and grind the floors a few ...
3
votes
1answer
52 views

Insulating wooden beams / frame from concrete footings

I am building a wooden terrace based on frame made of pressure treated lumber (ground contact grade) placed on concrete blocks ("on-grade" footings). Something like this: What I know is ...
0
votes
1answer
88 views

Can this failing concrete patio be resurfaced and how?

Parts of my concrete patio are eroding from around the gravel on the surface. I think it was built in the 70s or 80s. Some parts of the patio are in great condition, others are very bad. Shown ...
1
vote
0answers
74 views

Should the high side of a concrete block retaining wall be sealed?

I am mid-project in a DIY yard project. I have subbed out a large retaining wall to a civil / wall contractor. It’s 220 feet long, between 2-5′ in height, and makes 2 90-degree turns. It’s built to ...
0
votes
1answer
63 views

How should I drain an area of gravel between a sidewalk and retaining wall?

We are reclaiming a flower bed and extending our existing patio. After a gully washer I am now concerned about drainage for this 5ft by 36ft impervious surface we are adding. We are also adding a ...
3
votes
2answers
332 views

Rust free concrete fasteners

I need to fasten a 3/4 inch PVC trim board to a poured concrete basement wall. Since this will be on the exterior of the house I want to avoid rusting of the fastener. The previous pressure treated ...
1
vote
0answers
24 views

Spanning a Gap Between House and Garage with Chain Link

I bought this house a few years ago and the previous owner decided that this embarrassment was the best addition for this garage. Needless to say, it's horrendous and I want to take it off. (and the ...
0
votes
2answers
29 views

Rebar cutter and bender's and the relative grade range of steel

I'm comparing two budget rebar bender and cutter products (Crescent or HIT Tools), not sure the grade of steel Crescent is able to handle other than "soft or mild steel", HIT mentions up to ...
8
votes
5answers
923 views

Best way to source concrete for a long fence project

I've done several small fence projects before, and hand-mixed concrete in a wheelbarrow for each post as I set them in place. However, I'm now looking to build a wood guardrail around a parking lot at ...
0
votes
2answers
102 views

How clean does the surface of new-poured concrete footings need to be before pouring piers?

I'm moving a 8x16 shed-turned-shop onto nine 10" piers on 16" footings over a clay substrate. I'm doing a split pour. I have already dug the holes, poured the footings and set the vertical ...
0
votes
1answer
97 views

Gravel inside concrete form or form on top of gravel?

I am pouring a 5 inch concrete pad for a hot tub. I am planning on putting down 4 inches of compacted gravel under the concrete with rebar mesh in the center. My concrete pad will be 9 feet by 9 ...
2
votes
0answers
36 views

I have an old porous “fruit cellar” of stone/concrete mix crumbling apart. How can I close it off and fill it in? Same with an old leaky cistern

Our house is almost 100 and has a fruit cellar crumbling below our front porch. We had it repaired 3 times but given it is made of a stone/concrete mix the foundation repairs continue to crumble & ...
0
votes
2answers
49 views

Should I have thicker areas of foundation under posts?

I am building a structure with large frame timbers. The structure rests on 16 8x8 posts. There will be a foundation with a perimeter footer, but I want to know if the posts on the interior of the ...
0
votes
0answers
19 views

Stucco on concrete, order of operations

Our below-grade, painted poured concrete garage wall is showing some efflorescence and mild spalling (see image). I would like to cover it with one or two coats of stucco. I am made to understand I ...
0
votes
0answers
24 views

Home Bball court of concrete

I am looking to make a basketball court in my yard. Probably gonna be around 36’x25’. I think a concrete truck can bring about 10 yards of concrete. Would a 3.5” thick slab be strong enough? Do I need ...

1
2 3 4 5
31