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6 votes
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Concrete bags vs truck for slab

You should get a batch mix for this so that you can continuous pour it from end to end in a short period of time. This is the best way to assure a uniformity and even drying time for the whole slab. ...
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  • 61.7k
5 votes

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

Expanding drain plug, fits into inside diameter of pipe than expands to seal when the nut is tightened.
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  • 33.5k
5 votes
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Is insulation necessary under slab with hydronic radiant heat?

If you want to do radiant infloor heating you will need to insulate under the slab. If you don't you will constantly be rejecting heat to the ground underneath the slab, and it will suck excess heat ...
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  • 942
5 votes
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How much should I worry about this large crack in the foundation slab?

Sigh. Cheap builders are forever spending thousands on concrete, but unwilling to spend a few hundred on steel to make the concrete properly reenforced. Nobody sees the steel, but the lack of it does ...
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  • 137k
5 votes

Is this crack something that my builder should fix?

That crack is typical of concrete. There is just minor separation with no shifting along the 2 sections. The groove formed in the adjoining surface is a "control joint". It is there to ...
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  • 31.3k
4 votes

Noisy floating wall anchors

After a lot of time wandering the faster aisle at my local Ace, I ended up finding a rubber grommet that fit snugly around the 6d nails I am using. I then took the grommet and found a fender washer ...
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  • 861
4 votes

Need to move concrete slabs to backyard

10 stout men to tip the slabs on edge, then log rollers, Egyptian style. Maybe a bit of ramp to get them up to their final resting place.
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4 votes

Need to move concrete slabs to backyard

155 pounds per cubic foot seems a typical number for concrete. A cubic foot is 12x12x12 inches, or 1,728 cubic inches. Your larger slab comes to 7,625.75 ci and should be right about 684 lbs. Your ...
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  • 137k
4 votes
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Terminology - rebar "tie wire" or "tire wire"?

It has always been "tie wire". Just do a search, that is all you will come up with.
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  • 31.3k
4 votes
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Should I form and pour the concrete all at once?

If you don't care about leaks (or want drainage, so the dog is drier) forming the rim, pouring the rim, and then pouring the central slab is similar to whats typically done in a house basement. The ...
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  • 137k
4 votes
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How best to repair 24 sqft dirt hole in concrete slab

Probably low-stress, may not need anything much, but in the "better safe than sorry" mode I'd drill half-inch holes around the edges and stick reinforcing rod into them anyway. Steel is cheap compared ...
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  • 137k
4 votes

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

Insulated slabs usually have vapor barrier underneath. Since you did a test and found no moisture, there should be no problem installing vinyl flooring on it.
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  • 106k
4 votes

Does laminate flooring need an independent vapor barrier on concrete?

Lots of slabs are covered in carpet without any problem. It depends on your specific slab. To know you need to test the slab. Take a trash bag tape it down to the floor. In 24 hours pull it up. If the ...
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3 votes
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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?

Plumbing in concrete slabs pretty much requires ripping the floor open to make any changes to it. I suppose if you chose a new toilet with a LARGE base and were very careful you MIGHT be able to keep ...
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  • 137k
3 votes

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

Use a biscuit joiner. Then glue and clamp to dry. But depends what you using them for. There not going to be heaps strong if the timber spands over a distance.
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  • 302
3 votes

Do I have to cover pipes under slab?

Normally your drain pipes are ABS plastic having them bedded in the rock is fine. If your supply is copper (I do not recommend copper under a slab) it should be coated so the corrosive effects will ...
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  • 98.3k
3 votes

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

You do not want to just place the concrete tiles on native ground soil. A proper installation would be to dig out the native soil down to a solid base. Then lay in a layer of crushed rock to aid in ...
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  • 61.7k
3 votes

How to repair concrete damage from pulling up nail strips

Those small dimples are unlikely to ever be a problem, but if you want peace of mind, get some vinyl repair patch material and skim it on with a wide putty knife or trowel.
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  • 106k
3 votes

Cutting ceramic tiles laid on concrete

If the tile is well bonded, there's no reason to remove it. I would use construction adhesive under your wall plate, and I would use a masonry drill to put holes through the tile for your fasteners. ...
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  • 106k
3 votes
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DIY poly-jacking?

I suspect Tyson is right about the old holes being from termite treatment (although they should be 1' apart for that, so it would have been a crappy, ineffective treatment job). If they were from ...
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3 votes
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Jacking concrete slab with shed

If you “jack”...you crack. That slab weighs a minimum of 5,000 lbs. (4” thick) and will crack when you start jacking it up a few inches. Little known fact, concrete only has a tensile strength of ...
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  • 22.6k
3 votes

How To Remove Stone Slab From A Kitchen

Natural stone slabs are typically glued down if they are small enough to be moved when bumped against. Larger slabs, sometimes are staying put under its own weight, yet sometimes they get glued too. ...
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  • 31.3k
3 votes
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Is there enough time to pour 40 sqf 4" slab with 60lb bags of premixed concrete if working alone? Any hints?

The answer depends on your level of physical ability and ambition, and is therefore mostly subjective. There are plenty of folks who could do it. I wouldn't try it myself at my age and level of ...
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  • 106k
3 votes

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

You want to pour a slab of 40 square feet (so something like 5 by 8) and four inches thick. Let's break it down with numbers: I'm imagining about 1 bag per square foot, so you want approximately 40 ...
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3 votes
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Need More Water in Quikrete than Recommended

You should mix according to how you want the concrete to flow. Watering the forms and the ground before you pour is important when the climate is dry and hot. You are correct that the water mix ...
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3 votes
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What to use as a screed edge along a brick wall?

The conventional way to handle this problem is to use a length of 1.5 or 2 inch diameter pipe as the screed reference level. This pipe sits on top of a series of stakes that you place in the ground in ...
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  • 61.7k
3 votes

Can the kitchen sink waste pipe run from where it comes out of the concrete slab to the sink by running horizontally under the cabinet floor?

Horizontal - no. No drain line is EVER horizontal. Unless someone was an idiot and should not have been plumbing.... Perfectly acceptable to run at an appropriate slope, however. 1/4" per foot (...
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  • 137k
2 votes
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Should I patch this hole in my slab?

Bare copper will eventually corrode if it is in left in direct contact with concrete over time. You can try wrapping the pipe in duct tape and then covering it with sand, then skim coating over the ...
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2 votes

Strange smell in August only

Could there be a hidden floor drain in the area? It wouldn't explain why the timing is so regular, but it might be connected to something that does. I've dealt with a similar come-and-go odor problem ...
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  • 21
2 votes

How can I prepare this concrete floor for tile?

I would use a heat gun. Been here before even on thick drywall with up to four layers of paint. Wear a mask and have good venting. Shaves off with a scraper after heating with ease. Not too close ...
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