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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1answer
14 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 ...
2
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2answers
72 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 ...
3
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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
258 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
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1answer
69 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 ...
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3answers
88 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
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2answers
76 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 ...
3
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2answers
205 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, ...
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0answers
21 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 ...
3
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4answers
7k 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 ...
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6answers
32k 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 ...
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2answers
133 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
85 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
203 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
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1answer
60 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 ...
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2answers
153 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
42 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
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1answer
141 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
105 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
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1answer
40 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
47 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
58 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
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3answers
10k 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 ...
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2answers
187 views

Can a room be very cold because of the floor?

My house has a very small kitchen which is actually an extension of the house with its own roof. I suspect its roof insulation is old and not effective, because this kitchen is quite cold (8 degres ...
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2answers
49 views

How should I cut through hardwood floor?

I want to install steps to my basement. I need to saw through a hardwood floor. Is there anything specifically I need to do to the hardwood?
5
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3answers
1k views

Soundproofing a floor: How about cement backer board w/ Green Glue and mass-loaded vinyl?

I've been researching soundproof underlayments for floors, but the selection seems to be very paltry. It appears that you're pretty much stuck with mass-loaded vinyl (MLV), QuietWood, and a few other ...
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vote
1answer
144 views

Can I put concrete over PVC pipe?

I have my laundry room in the backyard and there is an area that had a thin piece of concrete and below it there is soil. Beneath the soil there lies the drainage PVC 1 ½” pipe, gas line (not ...
2
votes
2answers
209 views

How can I reduce squeaks in wood floors when no felt paper was installed between floor and plywood?

I've purchased a home where the previous owner installed 3/4" wide plank pine over a 5/8" plywood subfloor. The plywood is glued to a concrete slab but there is no felt paper between the 2 woods. ...
2
votes
2answers
146 views

Floating commercial dance floor over concrete

I'm involved in the laying of a floating commercial dance floor over concrete. It needs to last 10-15 years. The plan is to glue a layer of pressure treated wood directly to the concrete. On top of ...
0
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2answers
44 views

What to mask space between panel floor and balcony with?

We have put the floors on our own. They're not perfect and we have left too much space between the floor and the window. And a standard finishing element like this: is too small. Here are ...
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2answers
82 views

How do I tile over a leveled floor with a feathered edge?

I have a laundry room in a home I just bought which had some unseen water damage. They originally had the sticky vinyl tiles on there which I pulled up. The concrete underneath was pitted and uneven. ...
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vote
1answer
125 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 ...
6
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3answers
789 views

What should go between a wood plank sub floor and a hardwood strip floor

I am about to install a hardwood floor into a room in my 1905 farmhouse. The subfloor is 8-12" wide 1" thick planks. The floor I am installing is 2-1/4" prefinished solid hickory tongue and groove. ...
1
vote
2answers
439 views

What header joist sizes do I need for a loft bed?

I've decided to design and build a king-sized loft bed for our bedroom. Basically, I've got an 80" x 89" frame, 54" off the floor, covered with slats instead of plywood (see image, below). I'm sure ...
2
votes
1answer
109 views

How to level concrete floor that is chipped and has left over thinset

I removed some tile from a 10' by 15' section of my basement floor. As I was removing the tile, much of the concrete chipped away leaving low areas. Other areas have thin set remaining in the shape ...
2
votes
1answer
143 views

Floor plumbing pipe too far away from the wall for vanity

Floor plumbing pipe too far away from the wall for vanity. I do not want to cut a hole into the vanity shelves to accommodate this discrepancy because the shelves are already shallow with limited ...
2
votes
1answer
220 views

How can I use bulk electrical wire to make a subfloor heating system?

Electrical floor heating kits run US$10 to $15 per square foot, but bulk wire only costs $2.50. With the controller, you're still running under $4 a square foot. I have a construction background, but ...
2
votes
2answers
72 views

Recommended method to insulate a raised (joisted) floor in the UK?

We're just about to get a new wood-burning stove fitted with an external air feed and have a load of squeaky floorboards which need fixing in the same room, so we're planning on taking the floor up. ...
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0answers
60 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 ...
0
votes
1answer
70 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 ...
0
votes
1answer
80 views

Can I insulate under my condo's subfloor?

My condo does not have a basement. I have a subfloor with three dummy registers. I don't know why they are there. My heating ducts are in the upper part of the side walls. In the winter the cold ...
5
votes
3answers
11k views

How do I use 'surface shims' to level out a sloping floor?

Asked a question about leveling my floor here earlier this week, and one of the options suggested sounded appealing, but didn't contain enough detail for me (a not-too-handy, ...
1
vote
0answers
64 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 ...
7
votes
2answers
17k views

How can I build a cheap, do-it-yourself dance floor?

I would like to make a cheap DIY dance floor and I attained a roll of 3.5 ft x 6 ft vinyl linoleum for free. Can I use this in making a dance floor? Has anyone built their own cheap DIY and what ...
2
votes
1answer
137 views

Where can you find out how repetitive the patterns of a particular laminate floor are?

We are interested in installing laminate floors from the Quick-Step brand. Of course, for a laminate floor to feel "natural", there needs to be enough "variation" between sheets/planks so that the ...
0
votes
2answers
145 views

What 'quick & dirty' finish for a concrete floor

I am moving into a new home for 1-2 year period. Its an old office building and the landlord is flexible with how I decorate; as it will eventually be totally gutted and renovated. My 3 rooms are ...
3
votes
2answers
766 views

How to remove a tile with floor heating mat

Two weeks ago I laid 1 X 2 ft ceramic tiles in my bathroom using premix tile adhesive. After reading some reviews, I should have mixed my own - lesson learned. This weekend I added grout and all went ...
4
votes
3answers
821 views

How do I repair a floor joist which has a hole drilled less than 2 inches from the bottom?

I have three floor joists that have approximately 1/2 inch hole in them less than 2 inches from the bottom. Is there a recommended fix or approved method to correct this to meet code? These joists ...
2
votes
0answers
120 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 ...
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0answers
88 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?