Questions tagged [slab]

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2answers
39 views

What could cause a wet soil / moisture smell on concrete slab

I have a wet soil smell coming from the living room concrete slab. I had to remove all the tile in the leaving room. A remediation company came, they removed the drywall and dehumidified the place, ...
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1answer
33 views

How to inspect/test old capped off drain pipe

I have a roughed-in bathroom in the basement of my 1969 home. There is a 1.5" metal drain pipe coming through the slab. It is capped with a metal cap. I am looking to install a bathtub and use this ...
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2answers
55 views

Does laminate flooring need an independent vapor barrier on concrete?

House is on a slab. Installer and one flooring company says the laminate I am considering has underlayment attached and I don't need vapor barrier. Another installer/flooring company advises it is ...
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1answer
35 views

Do these plastic molds exist?

I want to make a few concrete pavers, so I started looking for a few tutorials, and found this youtube video. In the tutorial, he uses a plastic mold where he pours the concrete. Something like this: ...
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0answers
35 views

Concrete slab insulation is in the way - cut it back for flooring?

I have a converted garage built on a concrete slab. The slab is insulated with styrofoam panels which extend into the room about three inches, so the flooring does not go all the way to the interior ...
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2answers
58 views

Musty Smell in slab and block house

As my title states, I have a house that is on a slab and the exterior and most interior walls are block and covered with plaster. Since we bought the house we have noticed a musty smell that we ...
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1answer
57 views

Can the vapor barrier between a dry floating concrete slab and linoleum flooring be foregone?

I have a two year old house that sits on an 8" concrete floating slab. The slab is insulated below and around the side. The floors in the house are unfinished. That is, the concrete slab is ...
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2answers
132 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
96 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
56 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
101 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
98 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
53 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
61 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
41 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
78 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
53 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
65 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
62 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
49 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
166 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
101 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
99 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
110 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
1k 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
148 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? ...
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2answers
591 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
142 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
78 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
92 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
534 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
135 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
30 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
3k 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
287 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
455 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
187 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
48 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
301 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
134 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
744 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
153 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
528 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
449 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
63 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
580 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
64 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
158 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
579 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 ...