Questions tagged [slab]

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2answers
48 views

What to use as a screed edge along a brick wall?

I'm planning to pour a concrete slab along a brick wall and need to plan how I will screed it smooth. Three sides of the rectangular slab will have a removable wooden form, but the fourth side is ...
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1answer
69 views

Need More Water in Quikrete than Recommended

I am pouring a series of concrete slabs for a patio and I’m using standard 80lb Quikrete bags (https://www.homedepot.com/p/100318511). The directions recommend 3qts of water per bag and a max of 4....
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0answers
47 views

How to convert bathtub drain to shower?

I have a 1960's house. I am renovating a bathroom, removing bathtub and putting in shower. I will be using Schluter Kerdi-Shower for conversion. I would like to know what parts of that iron drain ...
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1answer
71 views

Would a concrete ramp added to an existing slab be less durable?

To remediate a situation my concrete company caused by changing the layout without consulting me, they propose to add a ramp partially on an existing (though new ~10 days) slab. I'm worried that it ...
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2answers
66 views

Low Height Deck Joist Support Options on Concrete

I'm looking to add a wood/composite deck over an existing concrete slab that has heaved/cracked and looks unsightly. We've only owned the house for a year so I don't have the full history but we have ...
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2answers
36 views

Drainage issue, water causing foul odor in home

I live in an apartment building where the building is built on a concrete slab. There is NO overhead drain pipes or gutters and the water pools up along the side of the building next to my living room ...
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1answer
49 views

Pipework after concrete slab is poured

I'm planning to build a 10x8 shed that will house the pipework and electrical equipment for a new well I recently had drilled. I would like the shed to sit on a concrete slab just for the quality of ...
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0answers
37 views

Cast iron sewer pipe leak? Or something else? Shower pan?

We have a concrete slab and it’s soaked. Water has been coming up through the grout of our ceramic tile. This may have been something that happened over time and we only noticed now. We had a few ...
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2answers
66 views

How much should I worry about this large crack in the foundation slab?

I recently bought a 3-story townhouse in northern Virginia. I pulled up the carpet on the bottom level (foundation is a slab on grade) and discovered a large crack running along the whole room and ...
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1answer
32 views

How to repair porch slab that has bricks embedded inside it

I have a cracked front porch slab at the front corners where it supports two decorative columns that support a small roof covering the entry door. I discovered that the pillars are on a stack of ...
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1answer
47 views

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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2answers
55 views

Having issues removing old tile

I recently started a project to do new floors throughout a house I just bought. We are gonna do about 1600 sq ft in total including the kitchen 2 living rooms, dinning room, and hall. Previously the ...
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1answer
44 views

Patch hole in cement slab when ground below is excavated

I removed a shower stall and there was a hole for the plumbing as expected but once I got a good look the entire area below the cement slab is open. I want to fill the whole as the bathroom is being ...
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2answers
129 views

Is there enough time to pour 40 sqf 4" slab with 60lb bags of premixed concrete if working alone? Any hints?

I am planning to pour 40 square feet of 4" slab to support light shed. I was thinking of using 60LB bags of regular premixed concrete (not fast set). I figured that getting it as ready mix in a truck ...
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1answer
70 views

What type of foundation is best in an area with silt loam soil, cold climate, and high water table?

I'm in the initial stages of planing a structure build, I say structure because what I'm really looking to build is an off grid ( no running water or sewer for staters ) vacation cabin on apiece of ...
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1answer
96 views

How To Remove Stone Slab From A Kitchen

How can I remove this type of blue onyx slab from an old kitchen without damaging corners? I want to reuse it on another house as Onyx is a bit expensive.
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0answers
67 views

Hot water slab leak - floor tiles still warm 24 hours after turning off water

Looks like we have a slab leak in our house. I noticed warm tiles around the laundry area where we have pinpointed the hottest point and the warmth seems to spread about 6 feet outwards. The weird ...
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1answer
914 views

New house concrete slab foundation cracks

I am building a new house in North Texas, it has been 17 days since the foundation was poured, I live close to the construction site, so I've been going 2-4 times a week. Today I finally was able to ...
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4answers
94 views

Jacking concrete slab with shed

We have a 10x10 wooden shed sitting on a concrete slab that is under water when we get lots of rain. Is it possible to raise the entire thing, slab and all maybe 6" somehow to get it out of the water? ...
2
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2answers
424 views

plastic sheeting under monolithic concrete slab

I'm trying to figure out how to put the vapor / moisture barrier under a monolithic concrete slab. Do I just put the plastic down and drape it over the form, and then cut to ground level when done (...
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3answers
137 views

How to remove concrete slab

I have this concrete slab at the front of my house which I want to remove. The slab has 2 air brick holes in it too. These are surrounded by bricks with cement on to give a rounded look and then ...
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0answers
67 views

Drilling Under Concrete Slab

My church is trying to figure out how to move their soundboard to a different spot in the sanctuary. All the existing wiring for the soundboard (mics, speaker wire, power controls, etc) come in ...
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1answer
75 views

Laying bricks over old concrete sidewalks

I just moved into an old house. The previous homeowner had concrete slabs as the sidewalks that are in touch with the house wall. From what I know, the concrete slabs not only provide a flat solid ...
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1answer
306 views

DIY poly-jacking?

I'd like to reslope the concrete slabs on the side of my house so that water doesn't run up against my foundation during hard rains. Everything I've read about seems to indicate I should do some sort ...
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0answers
117 views

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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1answer
2k 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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0answers
29 views

Leveling a concrete Slab

If I need to level a slab with a 2' sag in the center, should I pour regular concrete up to 1" before using a leveling compound?
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1answer
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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1answer
209 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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1answer
364 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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2answers
118 views

Cutting ceramic tiles laid on concrete

I'll be framing out some walls on a tile floor laid over a concrete slab subfloor. As I understand it, the proper way to do this is to cut out the top flooring, and attach the walls' base plates ...
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0answers
47 views

Insulating slab and vinyl siding

I have a really cold corner of my house in a duplex. Here are some shots from an infrared camera. I hope we can get this fixed without tearing down the siding or ripping out freshly installed kitchen ...
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1answer
243 views

Fill hole in slab beneath tub to reduce radon?

We recently discovered that our downstairs bathtub has a large hole in the slab beneath it where the tub drain and a few other pipes go into the dirt. We had a radon mitigation system put in a few ...
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0answers
105 views

Why is a corner of our garage floor slab all uneven?

Our house was built ~1985, and it has quite a few oddities. One of them is an irregularly shaped corner of our garage. Our garage is ~32' (9.75m) x 32' (9.75m), and a significant section (not square ~...
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1answer
571 views

How to repair a drain line broken flush with a slab

Ok so I have two drain lines going down into my slab that are broken flush or darn close to being broken off flush with the slab. I bought a hammer drill and was going to break around the drain rougly ...
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2answers
133 views

.5 inch copper pipe leaking at slab, .75 inch pipe from water heater enters

Pictured are pipes entering my slab in the wall behind my water heater. The wall has cellulose insulation in it, so I can't see, but my best guess is that there is a manifold in the wall there. The ...
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0answers
449 views

How to repair broken suspended cement slab

The very corner of the cement slab, which forms the floor of my basement, broke off. There was nothing supporting it underneath. the portion that broke off forms a triangle 11" x 10" x 14" x 3-6" ...
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1answer
389 views

Why is there sand/gravel under clay tile In a toilet room rather than concrete slab?

I am repairing flood damage in a friend’s home in Houston and upon removing the clay tile from the floor of a toilet room off of the master bath, I found it lacked the concrete slab underneath which ...
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0answers
58 views

What type of insulation and waterproofing (if any) should be done for a monolithic slab on grade?

When building a new residential home with a monolithic slab on grade (footer and slab are poured at the same time), should any water proofing, insulating or drainage be added besides the vapor barrier?...
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1answer
502 views

Wood between slab allowing ground water seepage

Warning: Lots of setup ahead... We have lived in our house for almost 3 years now. The house was built in a newer addition approximately 25 years ago. The grounds is mostly graded away from the house,...
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2answers
53 views

Moisture from under the floor - is this bad?

I had a prefab shed installed, which I'm finishing as a detached office. Since the floor got covered in drywall dust, it often looks like there's moisture seeping up between the floorboards. I'm ...
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0answers
137 views

New, larger slab over old slab, but needs some repair

I have a 20ft x 30ft (East-West x North-South) concrete slab (in two sections: 20x10 piece on the west, and 20x20 piece on the east) that I'd like to enlarge to about 30ft x 50ft in each dimension. ...
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2answers
527 views

Water entering a slab house

I live in a slab home that has a partial brick front in central NC. After a particularly bad bout of rain (hurricane), I discovered about a week later that some of the engineered hardwood floor in the ...
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0answers
260 views

How to pour concrete over existing slab?

How to pour concrete over existing concrete slab if existing wood framed wall structure is there? And where to place the new vapor barrier?(I have an existing garage that I would like to convert into ...
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1answer
1k views

Should I form and pour the concrete all at once?

I want to build a dog kennel/run that is 4' x 8'. I am planning on pouring a 4" concrete slab. However, part of my design is that I would like the slab to have raised edges all the way around it (...
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3answers
21k views

gravel under concrete slab? is it absolutely required?

so, I have a post-frame shed, 12x16. there are posts at 6' on the short sides and every 4' on the long side. posts are set ~18" below grade, on a 2" cap of cement over a few inches of well compacted ...
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2answers
96 views

If carpet has been dry for years is moisture level OK on slab?

Should I be concerned about moisture with installing an Engineered Wood flooring over a concrete slab (on-grade)? We have been living in the house for 10+ years with carpet flooring and I don’t recall ...
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2answers
978 views

How to repair concrete damage from pulling up nail strips

When pulling up carpet installed on a concrete slab, the wooden nail strip tracks often pull up sections of concrete and some of the concrete flakes off. I want to install an engineered floor on this ...
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0answers
113 views

How to renovate a basement floor?

I'm going to remove a berber carpet glued to a concrete slab and I'm not sure how to prepare the slab for a finished floor. I'm renovating a room in a finished, walk out basement. It's adjacent to ...
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1answer
118 views

What type and quantity of steel reinforcement should I place in a slab under a water tower?

I want to build a water storage tower I was going to build a slab about 2.8 meter by 1.8 meter the tower / storage room would be 2.5 by 1.5 and about 2.5 meters high and built out of concrete blocks ...