For questions generally relating to the structure and construction of floors in buildings, including designs, materials, support mechanisms, load-bearing calculations, etc. For questions specifically about the top-layer covering of a floor (tile, carpet, hardwood) see the "flooring" tag.

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4answers
2k views

how to repair large, uneven crack in concrete floor

I have a really long (about 20') uneven crack in my cement garage floor. Not only is it jagged, but the sides of the crack range from flat to about 1/2" high. I want to level the sides of the crack, ...
4
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4answers
5k views

How should I prepare a plywood subfloor for floating vinyl plank flooring?

The floor of my laundry room was three layers of hideous vinyl flooring of various vintages, a layer of 3/4" plywood underlayment (to match the height of the vinyl to surrounding hardwood flooring) ...
3
votes
3answers
110 views

Why does my basement floor paint come off when it's wet?

I painted my basement floor and now just 3 weeks later my washer leaks and the paint is peeling off. I also put some water down on a spot and when I wiped it up you can scratch the paint off. It is ...
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2answers
27 views

Finishing basement… level floors with SLC or install stud wall first?

Basement floor isn't too far off... wondering if I should get the stud wall done first or level the floor first....
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2answers
76 views

Spilt bleach on stained hardwood floor

Unfortunately upon moving into our new rented flat we have spilt a small amount of bleach (about the size of a large coin) onto hardwood floor. Here is a picture: Is there anything we can do such ...
2
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1answer
27 views

Is there a better method for fixing UPVC floor trim to skirting, other than the adhesive tape provided?

Can anyone recommend a better method of fixing UPVC (e.g. Homelux) floor trims to skirting other than the adhesive tape provided? Can you mechanically fix them or is it just down to adhesives?
2
votes
1answer
397 views

How can I repair a crumbling shed base?

I think I know the answer to this already but its worth a punt. I laid a 4mx3m shed floor (clearly badly), with about 10 cm of hardcore and 7.5cm of cement, that whilst in the middle appears fine, on ...
1
vote
1answer
31 views

How do I lay joists over a complex-sloped basement floor

I am helping a friend install a bathroom in his basement. The basement floor is partially rock which has been covered in plastic vapour barrier and then covered in a thin layer of concrete. (The ...
1
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1answer
79 views

Insulating and reducing boominess of plywood subfloor

I have a plywood subfloor in a ground floor extension that is laid directly on the joists. The current floor is half solid wood tongue-and-groove laid on top of green fibre underlay and half fake ...
0
votes
1answer
89 views

Need help leveling part of a floor

We had an 8 foot square hottub in our bedroom for 10+ years. Because of the weight, the floor has sagged in that section. The tub is gone now and we had carpeted around it, but now there is a big ...
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0answers
28 views

laminated flooring vs OSB

I'm considering the option of using OSB(10mm+ thick) in stead of laminated flooring, the floor is currently just concrete, on top of which there's linoleum on top of which there's a carpet. What I'm ...
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0answers
45 views

What can I do to fix water coming up from floor drain?

This vertical pipe is connected to the kitchen sink above and the utility tub in the basement. When the utility tub is used, the drain in the floor is backing up. If the sink is run upstairs it ...
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vote
0answers
121 views

How can I edge concrete without an edge trowel?

How can I make a concrete floor (also using dry shake color hardener) with a proper edge, without using an edge trowel? In Brazil I cannot find an edge trowel anywhere, so I would like to know if ...
1
vote
0answers
87 views

Will I have any issues installing an in-floor heating mat with premix mortar?

I installed a radiant floor heating mat under ceramic tiles using a premix mortar. I now understand this was not the right thing to do. After further research the only reason I can find that suggests ...
1
vote
0answers
117 views

How should I waterproof a replacement shower floor?

I have to replace the tile floor in my shower because of mold. What should I use to waterproof the floor and turn up the wall?
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vote
0answers
358 views

How can I stop water from coming up through the floor?

I have a house that is on a high water table, and water is coming up through the floor. The property was excavated around the perimeter a couple of years ago and installed a new Big "O". Drycore was ...
0
votes
0answers
13 views

renewing a heated bathroom floor

I heard there is a material that works great for renewing a bathroom floor which has a heating system integrated. We would like to give a new shine to ours but we don't want to break everything. I've ...
0
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0answers
39 views

Self levelling concrete as primary floor?

My kitchen currently has a concrete floor with a bit of underlay and then some funky blue vinyl on top of that. A new kitchen is going in Q1 this year and I'd quite like the look of concrete floors. ...
0
votes
0answers
23 views

Tile vs cement polish

We have unfinished basement. Years ago when we gutted, we put down a layer of dry lock on the walls & floors because that's what we thought was protective. We've never had water come in thru floor ...
0
votes
0answers
46 views

Which should I do first? replacing furnace or resurfacing concrete floor?

I'm going to get two things done in my basement soon (by hiring professionals), but I'm wondering what the right order of operations is. One task is to replace the gas furnace that sits near the ...
0
votes
0answers
47 views

Raise cupboard floor (under stairs)

We have a 1930s terraced house in London (UK) with a small cupboard under the stairs, its floor space is about 80cm x 190cm. The floor of this area is around 80cm lower than that of the hall that runs ...
0
votes
0answers
165 views

How can I remove self-leveling substance and glue from my floor?

I removed approx. 30 yrs old linoleum from a room that is 6 by 10 meters. Now I have a hard time removing the glue and self-leveling compound which are stuck to the floor. From what I can tell, both ...
0
votes
0answers
27 views

How can I prevent condensation under vapor barrier on a 1st floor room with flooring?

We bought last year an apartment of the 1st floor. The building has garages and utility rooms right under our level and the two bedrooms face north. One of the bedrooms has actually an external wall ...
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0answers
35 views

How do I seal an existing concrete floor before patching it?

We are patching an old concrete slab and we are having a problem with the glue or concrete seeping through small cracks onto the floor below. Is there something I can seal it with before we pour?
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0answers
48 views

How should I install a tongue and groove subfloor over ceramic tiles?

I am really new and not sure what I am doing to be honest. I am laying down a t&G subfloor over ceramic tiles to protect them(I am leasing a store front, owners would like to keep the tiles ...
0
votes
0answers
421 views

Leveling basement floor while keeping it sloping to the drain?

I am having similar problem with the basement slope being exceptionally steep around the floor drain (similar to this: How do I level a basement floor but not the slab underneath?). The discussion ...
0
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0answers
60 views

Does this black subflooring need to be replaced?

I'm working on replacing some laminate in my bathroom with tile. I ripped up the laminated and the particle board (which was black near the bathtub) the subfloor underneath appears to be black as well ...
0
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0answers
37 views

Brown Tile Floor Turned White

Living an older home with tile floors. Someone said I should clean it with mix of vinegar and water. I was actually cleaning a cabinet and spilled some of the vinegar and water solution and it has ...