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.

learn more… | top users | synonyms

3
votes
2answers
526 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, ...
10
votes
2answers
7k views

How do I do a minor grout repair properly?

I've got grout between some floor tiles that is cracking and coming out in small chips, over time. The tiles and remaining grout are otherwise in great shape. I suspect this is just a problem ...
2
votes
1answer
61 views

Filling deep gaps at corners of maple flooring

I have fairly new natural maple 3/4" [about 4" wide] flooring installed. The installer was sloppy and where the flooring butted against doorways (no doors, just open frames), he should have side cut ...
2
votes
1answer
68 views

Are all toilet bolts installed from under the floor?

My mom has an older toilet. When is became loose, in order to tighten the bolts she had to hire someone to go under the house. We just got a new toilet. I was hoping to install it as a d.i.y ...
2
votes
2answers
209 views

How can I remove oil stains from a concrete floor?

I rented a home, and the garage floor is concrete. It looks like the previous owner had a small car that dripped more oil than it retained. It has been parked on multiple spots, so there are ...
15
votes
2answers
16k views

How do I fix a squeaky floor below my carpet?

I have a squealy floor below my carpet on the 2nd floor of my house. It sounds like the subfloor under the carpet is moving up and down a little and makes this awful load squeak when I step down on ...
0
votes
0answers
21 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
1answer
38 views

Replacing floor boards, then sanding and varnishing etc

We've recently bought our first house (yay!) and are looking to have exposed floorboards throughout. However I realise it's a big job and due to work etc I'll probably have to tackle this one room at ...
4
votes
3answers
2k 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) ...
2
votes
1answer
308 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 ...
2
votes
1answer
12 views

Do I need to use a waterproof sealant in my entryway?

Do I need to use a waterproof sealant in my entryway, over the backerboard and under the porcelain tile or is the thinset adequate? Sub floor is above grade, 3/4" plywood. thanks!
1
vote
1answer
80 views

How would I go about leveling a sagging floor?

I had all my kitchen cabinets refaced last year. I than decided to replace the counters with granite. When the guy from the counter company came out he did some leveling test. I am putting counters ...
0
votes
2answers
43 views

Possible To Put an Epoxy Coating on Particle Board?

Is is possible/recommended to put an epoxy such as Rust-Oleum Epoxy Garage Floor Coating on particle board? Any help would be appreciated! ...
0
votes
0answers
26 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
1answer
43 views

replace one tile bathroom floor

18" tile part adjacent to toilet and under the flange cracked during toilet install (plumber). first try result: replacement tile is too high, i I had to remove it. Complication: tile rocks due to ...
1
vote
1answer
40 views

Preparation for laminate floor went south

So I've setup few laminate floors so far, and I'm no expert at this but this is what I like to do in my spare time. So I've got a condo in which there were carpets and I teared out those and all ...
0
votes
2answers
75 views

How to improve garage floor look and color?

Here is a image of my garage floor. Hi-Res Link This is after a professional high pressure water cleaning contractor that used degreaser and bicarb soda chemicals to try to rid the floor of oil ...
0
votes
1answer
52 views

Cover old ugly floor in a rented apartment?

We have to move to an old rented apartment, the floor looks terrible (it's green! and that's the original color!!). How can I hide the shame? I'm looking for the cheapest solution possible (ANYTHING ...
1
vote
3answers
119 views

Can floor tiles be installed on walls?

I am building a home and would like to install floor tiles on wall also, please let me know if it possible to install floor tiles on walls?
0
votes
0answers
19 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 ...
0
votes
0answers
34 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?
0
votes
1answer
51 views

Is plywood or dimensional lumber better for repairing notched joist?

During a recent remodel, I came across a 3 inch deep by 5 inch wide bottom notch in a 3x10 (the beams are that old!). I must say, i'm just a diy'er and even I was beside myself that someone would do ...
0
votes
0answers
19 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
1answer
40 views

How do I glue moving ceramic tiles without removing them?

There was a problem with the pipes under the floor, which resulted in several ceramic tiles being removed. At the moment these tiles are back in place. The problem is that 2 tiles next to them, that ...
0
votes
0answers
37 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 ...
6
votes
5answers
6k views

How can we fix bouncy floors?

Our floors are somewhat bouncy, especially in big rooms with long joists. I think that the main cause is that they used 2x8 joists on 15-20' spans. We are going to replace/install hardwood in ...
1
vote
1answer
64 views

Shaving floor joist

I have a small rectangular home 33’ x 26’. It’s built on a walled foundation with 2 x 8 joists running the width of the home and a center I-beam support. At the back of the home they stopped the cross ...
2
votes
1answer
44 views

Should the cement floor adheres to the concrete slab?

If I want to use a cement floor (with broadcast color hardener) over a concrete slab (laid over compact soil), should it adheres to it, or be separated? The concrete slab is rough, the cement layer ...
0
votes
0answers
48 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 ...
2
votes
1answer
216 views

What is the easiest way to measure an irregular floor space?

I would like to order a comfort mat for the floor of a small kitchen. The company can make it to order but I have to provide exact dimensions. This is harder that it sounds though as the floor space ...
0
votes
1answer
55 views

What causes uneven floors and can they be fixed?

I've seen two distinct cases. In the house I currently live in, the largest room in the basement has a floor that is uneven. Basically it dips lower towards the middle of the room. I presume this is ...
2
votes
2answers
113 views

Why are my floor tiles cracked and how can I lay them again so they won't crack

When I moved into my house, the kitchen has large floor tiles on the floor. Quite a few of these tiles are cracked. I've been told that the reason they are cracked is because under the floor tiles is ...
2
votes
1answer
86 views

How to make an uneven, damaged 'rustic' tile floor even for tile & parquet laying

I want to lay a tile border & parquet centre in my kitchen. That requires an even floor, ideally level too. The existing floor is an uneven mix of badly damaged tiles, with some parts plain ...
3
votes
3answers
260 views

Renovating Crawlspace with Poured Concrete Floor

My newly-purchased 1950s home has a below-grade crawlspace with a poorly-poured concrete floor. Specifically, it is very coarse and looks like it was poured and spread with a garden rake. In some ...
3
votes
2answers
144 views

How do I level a concrete basement floor with a 1" dip?

I want to level my concrete basement floor, but on one end it slants down over 1" (over a 3'x15' run). Can I fill this area before using self-leveling compound, to save money, or what else could I ...
0
votes
0answers
27 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 ...
4
votes
4answers
10k views

Can I install hardwood floors (not floating) on a concrete floor?

We have recently bought an old house, and the ground floor has a hard floor and is currently covered in tongue and groove laminate - which we hate. We'd like to put reclaimed floorboards down - is ...
30
votes
6answers
35k views

Should I use a subfloor for a finished basement's floor?

We are refinishing our basement and have not yet decided what to do for the floors. Part of the basement will be tile, and we are all set. However, the rec room side is going to be carpet. The ...
0
votes
2answers
554 views

When Laying Tongue and Groove plywood over 1x6 subfloor, do I lay it with the grain perpendicular to the floor joists or to the 1x6 boards underneath?

I am redoing a bedroom and I am in the process of installing a new sub floor. I currently have 1x6 running perpendicular to the floor joists. Some do have a bit of give to them. I am laying over that ...
3
votes
2answers
112 views

How can I repair the structure of this floor?

I am working on a house that the concrete piers on the back side have tilted, and pulled the ledger board and header away from floor joists. this resulted in the floor joists dropping over about a 30 ...
5
votes
2answers
234 views

Will internal waterproofing solve my moisture problems?

We've been working on our water problem for awhile now. Here's the deal: There is black drain tile under the home (all the way around) tied into a sump crock. Water was only coming in one side. A ...
2
votes
1answer
67 views

How to tell if carpet is destroyed after a flood?

The other day ago a water line going to an exterior faucet exploded in the wall and flooded my finished basement. The water level was around 1"-2" high and we imagine the water was running for ...
1
vote
2answers
414 views

How can I correct a crowned floor joist?

In my son's bedroom there is a raised spot in the floor along one of the joists. I went into the crawlspace with a level and that joist is bowed up about 3/4" to 1" compared to the other joists on ...
0
votes
1answer
49 views

Filling gaps in hardwood floor - what's the easiest way?

I've got an old, beat-to-hell, hardwood floor in my apartment in the kitchen where quite a bit of water ends up on the floor on a daily basis as there's obvious things like a stove and sink, but also ...
1
vote
1answer
165 views

What thickness, size, and quality plywood is required for an aviary floor?

12'L x 5'D x8'H size aviary needs what thickness plywood to hold human weight. Aviary floor is slightly elevated from the ground. Also, please specify how many floor joists it needs to hold the weight ...
2
votes
2answers
180 views

How can I make a wooden floor flat, without using self leveling product?

I am preparing to install laminate flooring in the hallway of our 30 yr. old house. The hall is just over 3 feet wide and 23 feet long. The support piers/beam run lengthwise in the center of the hall ...
0
votes
1answer
45 views

Adjust a refrigerator on the floor

My refrigerator stands on the floor unevenly. Its slant is small but enough to make the motor produce unpleasant noises. If I manually tilt the refrigerator a little bit, the noise disappears. ...
0
votes
1answer
59 views

I have an old house (100 yrs) up off the ground and in the past year the wood floors have began to sag where the boards meet [closed]

I think my house is about 1oo years old, I have lived in it for 15 years and just in the last year the wood floor has started to sag or bouncy where the boards meet. I thought it was in the traffic ...
1
vote
1answer
71 views

Do I have to replace backerboard before tiling a floor?

We recently pulled up the vinyl in our bathroom to discover that there is backerboard underneath. It is in good shape but has a thin layer of glue on parts. The surface is completely smooth. Can I ...
6
votes
3answers
12k views

What are these spongy/soft spots on my hardwood floor?

The house I recently bought has hardwood floors, but I've noticed that some spots are spongy when I walk over them. There is visible downward flex in certain spots to an observer of someone walking ...