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-1
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0answers
11 views

Concrete with crenelated appearance

Can anyone tell me the name of the crenelated concrete surface shown in the photograph, and what its usual/common purpose might be?
1
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2answers
121 views

Should cement be placed under concrete slabs for driveways or is sand enough?

I am about to get my driveway full slabbed using normal concrete slabs like below (i will be using rectangle slabs as opposed to square). The builders that came to give me an estimate said it would ...
0
votes
1answer
30 views

How Should I Fill In a Hole in Slab Around Floor Drain

I think I have a good idea about how to go about this, but wanted to throw it out here to make sure I don't wander down the wrong path. I recently installed a new floor drain. I broke up the ...
0
votes
2answers
423 views

How to fill / seal in-slab hvac ductwork?

My house is built on a slab. Within the slab are "channels" which act as ducts for the HVAC system. I assume it is partially lined with metal but based on photos from an HVAC-cleaner, it's hard to ...
2
votes
3answers
119 views

How can I pour a concrete floor/slab with two levels?

I am pouring a slab for a concrete floor for an 1800 sq foot house and would like the bathroom area to be about 3/8" lower than the rest so I can tile it and wind up with the floor and seams that are ...
2
votes
3answers
142 views

Noisy floating wall anchors

In Colorado basement walls have to be floating. Basically they are suspended from the floor joists, with a vertically movable anchor into the base plate, in case the slab moves due to expansive soil. ...
1
vote
1answer
38 views

Do I have to cover pipes under slab?

I'm adding a new toilet in basement and would like to know if the (drain) pipes that will be buried under the slab have to be covered with something else exept of the gravel (like wrapping them or ...
2
votes
1answer
96 views

Moving kitchen sink in slab foundation

I'd like to expand my kitchen and install a pantry in the corner. In order to do that, I'd need to bump out my kitchen sink and counters by about 6-8 inches straight back into family room. The ...
0
votes
2answers
41 views

Water seeping through where pipe exits slab foundation

OK, the backstory can be found in this previous questions: Repairing leaking DWV vertical 3" thin wall PVC. Basically, found mold growth behind baseboards of a powder bathroom adjoining the kitchen. ...
1
vote
2answers
220 views

how much weight a specific sized concrete slab can carry?

Say I have a portion of 10x10 feets. I need to put a concrete slab for that. The thickness of the slab will go 4 inches. Is there a way to tell, how much weight this slab can carry?
0
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0answers
26 views

What Should I Use to Seal the Concrete Slab under the Joists?

I'm renovating a slab on grade half bath. I'm concerned about moisture/condensation forming under the joists. Should I seal/paint the slab? If so, what product should I use? Most of the products I've ...
5
votes
2answers
11k views

How to insulate a concrete slab foundation in an older house?

What are some ways to insulate a concrete slab type foundation in an older home built in the 1950's? As far as I can tell, the slab is not insulated at all and results in a very cold floor and living ...
0
votes
0answers
20 views

Slab on grade room construction

Older home built in 1968, southern Ontario, 4-level split, built in single car garage. Behind the garage is a bathroom that I had to gut because of a pipe burst. This room is slab on grade. The two ...
7
votes
4answers
12k views

Is my shower drain leaking under the slab?

My wife & I renovated our master shower a couple years ago. About three months ago, we noticed the baseboards in the guest bathroom (on the other side of the wall from the master bath) were ...
3
votes
6answers
134 views

Need to move concrete slabs to backyard

I am building a pizza oven for the backyard and part of the build instructions said to build three concrete slabs (2 that are 47" x 20" x 5.5" and another that is 47" x 29.5" x 5.5"). It asks you to ...
2
votes
4answers
6k views

Can I float a tongue-and-grooved 1x12 pine floor over a concrete slab on grade?

I have bare concrete floor that was, until recently, covered with carpet. After recently seeing a friend of mine purchase raw pine, shape the tongue-and-groove himself, and seal it to achieve a ...
0
votes
0answers
19 views

Water softener brine tank into floor/ground?

Can the brine tank from a water softener be installed into the slab of my basement floor? Are there tanks designed for this, so that only the lid is exposed above the slab?
1
vote
3answers
46 views

Unsure if structure is solid concrete

My home was built in 1957. It has a 10x10 3foot high brick patio with a concrete slab on top. We are replacing the deck which is much bigger. The deck on the slab rotted due to water pooling in a ...
0
votes
0answers
58 views

What material can I used to fill gap between slab and house so that I can place vinyl tiles on the slab without worrying about cracking?

I am replacing some very old carpet in a sun room off my basement. This sun room was built around an existing concrete slab. I'd really like to put something other than carpet back in here, but am ...
3
votes
3answers
15k views

What cement product should I use to fix a hole in my slab?

I was removing old thinset and self-leveling cement in an area in preparation to tile it when the 6" chisel and demo hammer I was using sunk in to a specific spot. I found that this specific spot had ...
0
votes
0answers
40 views

Kerb concrete slab

I'm thinking of using some kerbing to retain a small mound of earth from falling onto a new concrete slab drive. But I'm not sure whether to add the kerb before or after laying the concrete slab. If ...
2
votes
2answers
244 views

What's the right approach for insulating the slab & footings underneath a masonry fireplace/heater?

The fireplace will be located in the middle of the concrete slab (away from the foundation stem walls) so it will have its own footing. My impression is that footings should rest on soil & gravel ...
2
votes
4answers
7k views

How can I prepare this concrete floor for tile?

I'm looking to replace an old carpet in my finished basement with tile. I've removed the carpet and found a surface with some peeling paint, which I've read needs to be removed since the thinset for ...
1
vote
1answer
34 views

Replace portion of slab for radiant heat

Our 1600 SF basement has a slab floor with no insulation underneath. I'm redoing the bathroom (roughly 100 SF, with 7' along the foundation wall) and would love to put in radiant floor heating, but I ...
2
votes
3answers
534 views

Is insulation necessary under slab with hydronic radiant heat?

We are getting ready to pour a new concrete slab over top of an old slab where a house was demolished. The old slab is 4-6 inches thick, and the new slab will be 3-4 inches thick. We would like to run ...
4
votes
2answers
241 views

What's the proper way to address a moisture issue in a concrete slab?

About 4 years ago my wife & I purchased a home. It was approximately 10 years old at that time. The foundation is a concrete slab. Approximately 2-3 years before we purchased the house, the ...
0
votes
0answers
142 views

house built on a slab and has about 1" gap between the walls causing a draft

My house was built on a concrete slab in 1998. My son put up wainscoting in the living room and when he pulled off the baseboard he said you can see the house next door. He then checked several other ...
1
vote
1answer
183 views

How can I close off a toilet drain in a concrete floor

I want to remove the toilet and turn the bathroom into a laundry room. How can I close off the drain?
1
vote
1answer
1k views

What is recommended method to fix sunken garage floor slab?

I have an attached one car garage where the floor slab seems to have sunken in one corner by about an inch and a half and varies lesser amounts in other areas. The slabs continues behind the garage ...
2
votes
1answer
731 views

What is the correct procedure to turn a 10“ rough-in toilet drain into a 12” rough-in drain when the drain goes through a slab-on-grade?

I need to replace a leaking toilet, but the distance from the drain to the wall is about 10.75". The selection of toilets that I'm finding in the 10" rough-in range is pretty pathetic and overpriced, ...
1
vote
1answer
314 views

How to fill hole in slab after installing new closet flange

The plumber broke up some of the slab, removed an old cast iron Y and put in a new elbow and closet flange. He left back filling and patching the slab to me (my choice). The edge of the hole is ...
3
votes
2answers
270 views

Should I patch this hole in my slab?

I'm in the process of tearing out carpet and installing laminate in my guest bedroom. After I got the carpet out, I discovered a hole several inches across underneath the wall that borders the garage. ...
1
vote
0answers
68 views

help and advice on shower renovation on existing slab

We recently purchased a home that is built on a slab. We're going to have the floors polished but we're debating about what to do with the existing shower. It currently has some sort of hard foam pan ...
1
vote
1answer
108 views

Strange smell in August only [closed]

I have a strange smell (somewhat like decomp but its not) that has presented its self every August since 2009 and stays for 14 days. It comes on strong the second day and stays the same smell level ...
0
votes
2answers
272 views

What type of insulation should be used to deter subterranean termites?

My house's structure is made of wood and there are subterranean termites (non-formosan) in my yard and area. I am planning to excavate and insulate the slab perimeter in the interests of saving on ...
2
votes
3answers
3k views

How should I support upright posts on a slab with no footer?

We are wanting to use a structural ridge beam to put a new roof on our house. I have been talking with an engineer who said that we need to determine how big the footer is under our slab. However, ...
1
vote
3answers
268 views

How do I join pieces of wood tiles, 12“ by 12” pieces, to make a larger slab?

I have a project to work on that requires me using larger pieces of planks than what I currently have. I have square planks all over the porch that would suffice if only I had a good way of fitting ...
3
votes
2answers
6k views

How can I level concrete pavement for an above-ground pool?

I want to set up an above-ground pool (14' round) on my back yard. There is a relatively good place for it, where there are concrete slabs, however, there are two problems: The slabs are not level. ...
4
votes
1answer
261 views

What are the dimensions of the steel in the concrete slabs on the upper floors of my house?

Drilling holes (for curtains) in the ceiling of the 1st floor(2nd floor in the US) of my house I ran into a steel rod in the middle, running parallel to the outer wall. The steel is about 2.5cm in ...
1
vote
2answers
417 views

options for new floor over concrete slab

I am in the middle of a basement renovation, roughly 1000 sq feet. The existing floor is some sort of vinyl sheet material over concrete slab. There is an existing floor drain in the current washing ...
1
vote
1answer
79 views

How to insulate slab that's been extended?

I bought a house built on a concrete slab on grade. It's an older house, so no part of the slab was insulated. At some point in the past, previous owners decided to pour concrete around the entire ...
1
vote
1answer
251 views

How can I repair my two sloping concrete slabs?

I have a home I'm working on that has been in the family for a while. I have two slabs ,one where the original home was built and another where it was added on. The two slabs run the entire length ...
6
votes
3answers
378 views

Frame Overhanging Slab by 3inches and not attached to support bolts

I'm using a contractor to build a brand new 2000sq foot home. There is one section on the house that looks suspect. The slab subs obviously overpoured, and it looks like it was compounded even more ...
1
vote
2answers
719 views

Heating issues with slab foundation 50 year old home

I put a new furnace in (97% efficiency) because this home is so cold on the floors that my feet are cold anywhere I walk. Now have heat vents in ceiling but not helping any. Always cold, especially ...
1
vote
1answer
350 views

How can I smooth an uneven concrete floor?

I have had a extension built at the back of my house. It is almost complete now. I had a 6 ft. 6 in. patio door at the back of the house, and the builders left it till last to remove. This will leave ...
3
votes
2answers
481 views

Is this normal for the brick to extend past the concrete slab foundation?

I am in the process of buying a home and noticed that the brick extends past the concrete slab foundation. I checked different houses around the area and all were flush with the concrete slab. Is this ...
1
vote
1answer
746 views

Sand dribbling out under baseboard. What could cause this?

The scenario: Slab on grade construction. House built 1938, slab poured in 1950's we think. San Francisco area. New framing, new hardwood floor, new baseboards. Completion 6 months ago. Altriset ...
3
votes
3answers
1k views

How should I remove a raised concrete pad on my basement floor?

I have a raised square of concrete, about 42" by 42" by 6" in my basement. Its probably an "equipment pad" of some sort, not sure what it was originally for, but it is inconveniently placed. Its ...
3
votes
1answer
8k views

How to stop concrete slab floor from absorbing water

This weekend my wife decided to clean up my office. When she pulled the old filing cabinet away from the way, she noticed the baseboards and carpet carpet were showing signs of water damage. It's a ...
4
votes
1answer
593 views

What is this pipe called, and how does it work? (Round II)

OK, thanks for people's help on my last question, now I've confused myself again. I came across this picture, similar to the last question, but I don't think it's a cleanout. It looks like a vent to ...