Questions tagged [slab]
The slab tag has no usage guidance.
236
questions
0
votes
1
answer
48
views
Hydrostatic Pressure Lifting LVP
LVP is about 9 months old, over a vapor barrier, on slab at grade I suspect hydrostatic pressure is the cause.
Can anything be done to salvage these floors? Will placing a dehumidifier make a ...
- 81
0
votes
1
answer
40
views
Basement slab heave
I have a finished basement with a storage room that has no flooring (just concrete)
There is a French drain, and all downspouts direct away from the house. I noticed some small heaving in this area ...
- 1
3
votes
2
answers
709
views
concrete slab for shed base
I am about to order 12x20 shed kit and need to start building concrete slab. Can I throw 3inch gravel and 2inch concrete on top of the gravel? Or this wouldn't last long? I can pour all concrete but ...
- 33
0
votes
0
answers
40
views
Concrete slab over a shed window
Building an economy shed out of concrete blocks 8"x8"x16" and half blocks.
I am attaching a schematic drawing.
The shed base is square about 12.5' (9.5 blocks) each side.
Inside height ...
- 117
0
votes
0
answers
32
views
Large drain opening found in basement slab. Best way to tile around it?
I was tearing up a wooden platform the previous owners had in our laundry room because I'm going to tile.
I figured I'd find a drain in the slab underneath but not something this big. It's probably 12 ...
- 11
0
votes
0
answers
40
views
Cracks in new house slab foundation?
Here are the pics of our foundation home in Ocala currently under construction with cracks in the garage running from one side to the other and in the kitchen from the sink square to the shower stall ...
0
votes
1
answer
81
views
Post tension slab tendons intersections
I ordered pre-pour inspection for the house we are building and I've got this report. They say tendons should not overlap at intersections. I'm concerned that it's like that by design. Gonna ask about ...
- 379
2
votes
1
answer
1k
views
Is it safe to excavate soil next to concrete slab?
I'm looking to regrade the soil around my shed so water doesn't continue to damage the sill plate. The concrete slab is barely above grade, so I'm looking to remove soil to expose it another 2-3 ...
0
votes
0
answers
39
views
What could this conduit under my basement slab be?
I was moving a shower drain for a basement bathroom and exposed what looks like some kind of cable conduit under the slab. It looks like the kind that's slit all along the length of it and just snaps ...
- 521
0
votes
0
answers
87
views
Water seeping under bottom of vinyl siding
Just moved in this house a couple of months ago and just noticed our home extension has water seeping through from the bottom of the vinyl siding whenever it rains. My house sits on a cement slab. I ...
- 1
0
votes
0
answers
36
views
Question on soil and grass above foundation
My wife and I just bought our dream 1960s renovation and we noticed that the yard and gravel patio area is pretty much covering up the entire foundation. Is this something we need to worry about long ...
2
votes
1
answer
2k
views
Can I build a room addition on a former concrete patio slab?
This concrete slab has a size of 9x20 square feet. It's 1 foot deep. I would like to build an ADU or room on it. I have included a 3D model of the room in the attached image. Can I re-use the existing ...
1
vote
1
answer
433
views
Cracks or fissures on island? Is this normal and acceptable work for quartzite island?
We’re wrapping up our first home renovation and I’m unsure if this is normal or not. I noticed some cracks (or fissures?) in our island (jadore quartzite), which stood out because they catch your ...
- 11
2
votes
1
answer
612
views
How to abandon under-slab ductwork?
Our sub-slab ductwork (sonotube and sheet metal, no transite) is in terrible condition, so were switching to mini splits. We need to figure out how to safely and effectively abandon the current system,...
- 21
14
votes
8
answers
13k
views
Are loose-stacked bricks a suitable base for concrete steps?
We have a contractor building a set of concrete steps outside of our house (will be leading to a new French door whenever we get the door). They are using a bunch of left over bricks as filler they ...
- 243
2
votes
2
answers
2k
views
Anchoring aluminum pergola to 4" slab
I just purchased a 11'x23'x8' aluminum pergola from Wayfair that will arrive in a couple weeks. It weighs roughly 750lb. In some reviews, it says the concrete screws that come in the kit are kind of ...
- 23
0
votes
1
answer
51
views
Will I have condensation on a slab cooled with groundwater?
New Construction, SLAB COOLING
I’m planning a 24’ x 24’ two story studio with guest quarters, kitchenette & bath. The first floor heat will be an insulated concrete slab with PEX, boiler ...
- 1
1
vote
0
answers
58
views
Is gravel required under a concrete slab that is beneath a fence (not supporting it)?
I have a vinyl fence around the back of my house. The posts are already supported by cement. I want to create concrete forms in between the posts to cover the dirt so I don't have to deal with weeds ...
3
votes
2
answers
4k
views
How can I pour a 20' x 20 ' slab on a slope?
What is the best way to pour a slab that is 20 ft x 20 ft but has a slope. The grade is 18 inches higher on one side
- 31
1
vote
1
answer
1k
views
Best self leveling compound to use for this situation with LVP (1/2" feather edge thickness) [closed]
Looking for advice on which type of self leveling compound to level most of the concrete floor tied to this question asked earlier. I want to make it close to 6/16" min relative height so its ...
- 121
0
votes
1
answer
433
views
Adding laminate to concrete slab, am I planning this right?
Looking to put in Laminate flooring and seeing if my plan is ok or if it needs some correction.
Background
This is a half basement on grade, with about 4 feet underground on one side and walk out ...
- 121
0
votes
1
answer
75
views
How can I feed 2" PE pipe through a slab--asking about bend radius? [closed]
I'm trying to set sleeves for a monolithic slab pour. One of the sleeves is intended for running 2" water line. I wanted to use HDPE SIDR pipe aka flexible poly pipe. I can't find bend ratios for ...
- 111
0
votes
0
answers
183
views
Underpinning concrete slab in garage
I am looking at buying a property with a raised section in the garage with a concrete floor. This is a garage entirely seperate from the house. The earth under the end of the slab has fallen away:
...
- 101
0
votes
1
answer
402
views
What is the best way to cut drywall that is touching concrete slab and can I fill the gap with backer rod?
Updating our late 70s house we bought in 2020 and and after removing tiles, found out the 2018 installed drywall touches the slab.
3 questions:
Is the easiest way to fix this use an oscillating tool ...
- 121
0
votes
1
answer
170
views
water under sill plate, rotting sheathing
I have a detached garage of unknown age - the house is from 1935, so probably around then or newer. The garage is built directly on the slab with no curb wall. On one side of the garage, the slab is ...
- 103
3
votes
1
answer
3k
views
Do I need reinforcement mesh or bar in concrete slab?
I've done a bit of searching and found conflicting answers: do I need reinformenent in my concrete slab?
I am planning on putting down a 12ft by 8ft concrete slab for a shed (just for garden storage, ...
- 401
1
vote
0
answers
72
views
Will the vent arrangement for my bathtub pass inspection?
4 fixture bathroom - Florida inspector says all fixtures need to be wet vented in bathroom.
I want to ask if the bathtub to the right with its own vent will work. I believe the inspector is wanting ...
- 11
0
votes
0
answers
22
views
How to repair cracks in concrete floor after a slab leak?
Had a cold water leak in pipe under slab. Water came through cracks in floor. What is best and inexpensive way to repair the cracks?
1
vote
1
answer
220
views
Why does my home have a double slab in the basement? [closed]
We recently got about 12 inches of water in our basement during some heavy rain. I've decided to put in a sump to prevent this in the future. I rented a breaker to get through the concrete. After ...
- 11
1
vote
1
answer
1k
views
Can I build a wooden staircase on a concrete slab and meet code?
I'm currently in the process of replacing the front stairs on my house and my original plan was to go with a precast stone/granite staircase. To support this I poured this 6'x8'x6" pad to have ...
- 11
0
votes
1
answer
143
views
I'm looking to install turf against concrete patio slab, but the weep screed is in the way
I have a conundrum. The concrete slab depth ends right around the stucco weep screed on one side of the patio. I want to install turf and obviously won't be able to make it flush. There may be less ...
- 3
0
votes
3
answers
231
views
Refilling gravel under slab on a downhill grade
Our front patio was poured over an existing slab, with a significant gravel layer between them. I am digging out our water line, which happens to run just outside the edge of the slab. The plywood ...
- 151
0
votes
3
answers
377
views
What is the structure of a cement front porch on a 1940's house
We've been unable to get porch & deck enamel paint to not peal, so we are thinking of demolishing it for a rebuild of some or another design.
Last paint job was ~5 years ago. Scraped off all the ...
- 23
0
votes
0
answers
45
views
Double P Trap Unvented Under Slab
My kitchen sink has 2 p-traps that are unvented. One p-trap is under the kitchen sink, and the second is under the slab.
What should I do? I am concerned about toxic sewage gas, not a slow drain. It ...
- 1
0
votes
0
answers
78
views
Cement porch removal
We are planning on removing a cement porch from our house, which has a room underneath it. My husband did this to my parents house, using a sledgehammer, but he was 35 years younger. He has some type ...
- 1
7
votes
4
answers
8k
views
Pouring a concrete slab in batches
I'm wondering if it's okay to pour a 7 x 9 x 4" slab for a shed in batches, in that I'm not able to handle all of the concrete in one day. If so, is there any attack plan that would work the best?...
- 71
0
votes
1
answer
114
views
Preparing addition room for a concrete slab, then dicovered old stair well hidden, how can this be dealt with?
An old addition room to a unit has structural issues, it was more than a hundred years old, and the floor structure was rotten, turns out they used a large beam in a reverse brick shelf right on the ...
- 538
1
vote
1
answer
99
views
Water coming from the slab under the tub?
My house was built in 62, with cast iron pipes. They failed and I had them re-lined (CIPP). My guest bathroom backs up to my master bedroom closet.
The other day when the kids were in the bath, I ...
- 11
0
votes
1
answer
56
views
concrete patio, grading, geotextile [closed]
I am about to make a concrete slab patio along the wall of my house facing the backyard (38' long house wall, 10' wide concrete slab).
To ensure proper water drainage (now, water may stay next to the ...
0
votes
1
answer
539
views
How do you fasten interior walls to a post-tensioned slab?
I want to install French doors on an opening on the ground floor of my house. This will require building out a small interior wall to frame the doors as the opening is too big at the moment. We have a ...
- 299
0
votes
2
answers
180
views
Can a concrete slab with a 6 inch deep footer support a wall made of 8"x8"x16" concrete blocks that is 8 ft high? [closed]
Slab is reinforced with 1/2inch rebar. The footer is about 9 inches wide. This is located in Atlanta, GA. I am no soil expert, but there seemed to be a fair amount of clay in the dirt.
Underneath the ...
1
vote
1
answer
1k
views
Crack in ABS drain pipe at slab
As pictured, this is my kitchen drain line and vent. It may be hard to see in the photos, but the 2" ABS goes into the concrete slab. Due to earth movement (my guess, and you can see the line ...
- 41
0
votes
0
answers
224
views
Is it okay to reroute this water heater line?
The slab under hot water heater 3/4" hot manifold was leaking, so I decided to have plumber reroute through the attic.
The 3/4" copper that supplies hot water to bath manifold through the ...
6
votes
3
answers
2k
views
Increase Thickness of Concrete Pad (for BBQ Island)
I poured a concrete pad a year ago in preparation for a BBQ island that I'm building. Unfortunately, I was slightly off on the elevations and as a result, the pad is level with the patio pavers (was ...
- 117
-1
votes
1
answer
139
views
Total weight my slab can carry
I have a stilt and first floor .It have size of 10'x18'. It is concrete slab of 4" and it doesn't have reinforced. It has been supported by steel beam and column. Now I have a table of marble ...
- 1
0
votes
0
answers
68
views
Filling the holes for a concrete slab
There are two holes occured on 1st floor slab which are irregular in shape and able to see the ground floor which are having beams between it. How to fill those holes without disturbing the slab???
1
vote
2
answers
76
views
Slab Leak in Foundation [closed]
If there is a slab leak, will the water eventually come directly out of slab above the leak or can it come up in the surrounding are?
- 21
5
votes
4
answers
4k
views
My bathroom slab is 2 inches lower than the rest of the home's slab. How should I level it?
I am renovating our primary bathroom in our 1958 home. I demoed the tile and decided to demo the dry pack used to float the bathroom. After getting the dry pack out it appears my bathroom slab is ...
- 53
0
votes
0
answers
136
views
Extend concrete slab on slope
We have an existing concrete pad that is 18’ wide x 20’ long. The slab is level but is built into a hillside so has poured concrete that goes from level at access point to about 2’ at rear. We would ...
1
vote
1
answer
106
views
How can I determine if a prexisting slab on grade is frost protected?
I have a detached garage that was built sometime in the 50's. At some point it seems that an addition was made to it to create a shop. There was an old oil burning stove in there as well on the ...
- 13