Structure above the floor joists and below any finished flooring.

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20 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 ...
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2answers
34 views

Basement Subfloor for Moisture Problems

I have a slight moisture problem in the basement. During really torrential rainstorms of 5+ inches of rain, sometimes water seeps up though the concrete floor in the basement. I'm looking at ...
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1answer
13 views

Laying new tile on subfloor with old plumbing holes, patch needed?

Laying floor on a subfloor that has old plumbing holes in 3 places. The biggest one is just 2 inches, the rest are smaller. Otherwise the floor is in excellent condition. I'm using ditra. Is it ...
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1answer
48 views

“Top layer” plywood subfloor fastened to decking

I just tore out a ton of particle board subfloor that was previously used for carpeting. The entire house has decking (2x6 planks) running on a 45 degree angle over joists with 3/8" plywood over the ...
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2answers
28 views

How to remove tar left over from old floor carpet?

Redoing bathroom floors and under the tiles there was really old carpet. I was able to remove the upper layer of it, but there is a tar-like substance stuck on the wooden floor that is very difficult ...
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1answer
36 views

Can I install T&G Bamboo floor over a sagging subfloor?

The subfloor dips about an inch on one axis across the middle of the room. Structurally, I think this is due to old and rectified foundation issues. Since the dip is just 1-dimensional, can I install ...
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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 ...
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1answer
91 views

How To Level Uneven Fireplace Hearth Concrete?

I am remodeling my fireplace. The hearth and mantle were granite/marble slabs (huge ones cut around the firebox). I removed them from the mantle and hearth with a sledge and chisel, expecting thinset ...
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3answers
80 views

How to flatten the sagging OSB subfloor?

I am preparing the subfloor to install engineered hardwood floor by floating installation. However, the subfloor is too much sagging. There is a big area with about 5/32 depth. See: The real ...
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3answers
232 views

How can I protect the soleplate when framing basement walls?

I plan on finishing my basement and I have a specific question about framing the walls and protecting the soleplate. I plan on framing and setting up the walls BEFORE laying the subfloor, but that ...
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1answer
56 views

Raising porch floor to accommodate plumbing and keep first floor all one level

I have a question whether or not building a floor on top of concrete is a viable option to insert plumbing underneath for a half bath. I am looking to finish a small porch off of my kitchen and turn ...
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1answer
89 views

Raise concrete floor with carpet to same height as adjoining floor

My living room has a concrete floor and adjoins my dining room. The dining room used to be a kitchen in a pre-extension life and has a screed floor. The screed floor is about 20mm higher than the ...
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2answers
256 views

How do I remove Cement Board that has been screwed in and is bonded to wood subfloor with thinset?

I am in the process of purchasing a townhome and I am looking to tear up the existing 12" ceramic tile that covers the entire main level... an area close to 600 sq. ft. to make way for laminate ...
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1answer
44 views

removal of subfloor for exterior wall

This wall is an exterior wall and has 2 layers of flooring, with the wall sitting on top of the floor. I want to remove the flooring and install advantack t&G.I would like to leave the bottom ...
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3answers
608 views

What is a proper high-quality sub-floor preparation for porcelain tile floor installation

I am preparing to do a kitchen remodel where I am replacing an existing tile floor with a new porcelain tile floor. The old floor that is being replaced has several areas where it is not level and ...
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2answers
50 views

Help translate terminology relating to concrete floor construction

I just bought a house which had an extension done 12 years ago. I am about to do some work in this area and want to understand what has been done before. Below is a screen shot of the bits of the ...
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2answers
551 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 ...
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2answers
705 views

Proper way to install double-layer of subfloor?

I am installing natural tile, so I've had to reinforce the joists a bit and I'm currently working on installing a new subfloor. The subfloor is 3/4" plywood with 1/2" plywood on top of it. The ...
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1answer
1k views

How to properly install tongue and groove plywood subfloor?

I'm doing a remodel and can't seem to find the proper method for installing the tongue and groove plywood subfloor over joists. I mean, I think I pretty much understand how to do it but there are a ...
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1answer
73 views

How do I repair nail holes in cement board?

The transition strip between my tile bathroom floor and my carpeted bedroom floor is coming up. The nails that (should) hold the transition strip in place are nailed into what looks like concrete ...
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0answers
13 views

Floor filler cracking out

I have a situation where a wood sub floor meets concrete and the filler between the 2 keeps cracking out, any suggestions on what I should be using?
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2answers
446 views

How do I properly lay a tongue and groove plywood subfloor in a remodel?

When laying T&G plywood subfloors, do all of the edges need to be supported around the perimeter of the room? If so, I may need to add some sort of blocking in my project and I'm not sure of the ...
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2answers
378 views

Do stairs need to be the same height after landing?

I have set of stairs that leads from the main floor to the basement. A little over half way down there is a landing (typical L-shape). I'm looking to put in an insulated subfloor in my basement, ...
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0answers
23 views

How should I treat a urine stained subfloor? [duplicate]

After moving into my house, I realized that the carpeting in the dining room had been used as a toilet by the previous owners pets (and potentially the previous owners themselves). Because of this, ...
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2answers
234 views

How much of a gap do I leave between the wall and the OSB I am putting down on the concrete for a subfloor?

I am putting down a product similar to the plastic used on the DriCore 2x2 sheets on the concrete for a vapor barrier. I have 3/4" tongue and groove Oriented strand board (OSB) I will be laying down ...
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1answer
219 views

Should I frame a wall before or after installing the subfloor?

I just ripped out the subfloor in my bathroom to make plumbing easier since I am changing the layout of my bathroom. I also want to increase the size of the bathroom and eat into the walk-in closet ...
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0answers
267 views

What kind of subfloor do most people use these days?

I've been reading tons on how to do a subfloor for my basement and I don't seem to be getting any closer to an answer. So far it looks like there are 4 ways to do this: (I'm stealing a good part of ...
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1answer
439 views

How to Fix an Unlevel Floor on an Upstairs Floor in Preparation for Nail-Down Hardwood Flooring?

I'm contemplating both worthwhile solutions from this less specific question. However, I'm concerned about my ability to nail down hardwood flooring after using a leveling compound, and am reluctant ...
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2answers
4k views

How should I prepare a plywood subfloor for vinyl sheet flooring?

I'm planning on replacing the carpet in my dining room with a vinyl sheet flooring. I know I need to get the carpet, padding and any staples/debris cleaned up before laying the vinyl, but do I need ...
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3answers
858 views

Basement subfloor, how exactly should I do it?

I am finishing a basement with my father and want to put in a subfloor. I know if there was ever enough water I would probably have to replace the floor anyways but want to give myself a couple inches ...
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0answers
253 views

How should I build a base floor for a large summerhouse?

Hi my question has 2 parts about piles and creating a subfloor. I want to install a 4.8x4.8m (~16'x16') summerhouse; its existing floor is 24mm (~1") floor boards on 75x50mm (~"2x3") floor posts. I ...
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4answers
224 views

What is the easiest way to tear out a bathroom subfloor?

We recently did some remodeling, and in the process, managed to hook up the toilet in the bathroom to the hot-water line. The trouble is, we discovered this fact after we had already put down the ...
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2answers
344 views

For Subflooring, what is the distance needed between screws?

I have 3/8 inch particle board which I am screwing and gluing down to 5/8 plywood. How close together should the screws be?
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1answer
771 views

Is it safe to use screws in subfloor-to-joist connection to eliminate floor squeak

Getting ready to have some hardwood (12mm laminate, technically) installed in our dining room, and in preparation for this, I bought some 1.25" stainless steel screws that I'll be putting down through ...
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2answers
3k views

What to do first in a basement? Dricore then frame on top? Or frame and then lay dricore?

My thinking is to use blue wood with a plastic barrier underneath, and then lay dricore up to the finished walls. However, the dricore instructions say that framing should be on top of the sub-floor. ...
2
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1answer
89 views

what impact tools are needed for subfloor in the basement?

I would like to know if there are any impact tools that I need to make the subfloor permanent or stable to avoid sound later. I don't want to use DRIcore for this matter.
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3answers
1k views

How should I install a plywood subfloor that will be covered by granite tiles?

I am replacing my entryway floor and I have removed the old mud bed. I'm left with planks perpendicular to the joists. However the room is defined at a 45 degrees angle from the joists, so the planks ...
4
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3answers
132 views

How do you level 1/2“ x 6” flooring planks?

We have a 1920's house with some 1/2" X 6" planks. Unfortunately the floor is in quite rough shape with finger wide gaps in some spots, I started to attempt to sand and flatten it but I think it will ...
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3answers
354 views

What is this old 1/16" thick floor-covering, and how do I remove it?

We recently pulled up the carpet in our bedroom, and found this gray covering over the wood subfloor, which seems to be adhered to the wood with a black adhesive (some previous owner scraped away ...
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2answers
473 views

Is it feasible to cover low-pile carpet with a 1/4" subfloor and vinyl tile in a kitchen?

Scenario: I'm the owner of a multi-unit 2 story apartment. The people living up and down are cousins to each other and are in the process of switching apartments -- long story, don't ask. The upstairs ...
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1answer
66 views

How do I patch a hole in the slab under a kitchen island?

This is one step further than How do I remove musty smell in coat closet?. There was a sewage backflow under my kitchen island :( I fixed that problem, but now there's a musty smell in one of the ...
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3answers
3k views

Does XPS+OSB subfloor need to be anchored?

Mike Holmes is a big fan of OSB/plywood over 1" XPS for basement floors, though his book leaves something to be desired in terms of details. His book says: ...on top of the foam, you want to have ...
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1answer
419 views

How should I flatten (not level) a concrete subfloor?

In the final stages of finishing a room in our walk-out basement. This particular room has a long history, as it was originally a garage. Thus, it has a slight pitch from the back of the room ...
2
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2answers
442 views

Should I continue my basement subfloor under the stairs?

As part of finishing my basement I'll need to rebuild these stairs to account for the higher floor level. The back of this stair case is currently open to the lower basement, but that will be getting ...
3
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1answer
162 views

What to do about subfloor covering sole plates?

My basement already has framing and insulation around the outside walls, along with a few outlets in them. If I were to do 3/4" OSB over 1" XPS for a subfloor the sole plates of those outer walls ...
2
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1answer
151 views

Can I install Delta-FL in only part of a basement?

I've been looking at finishing my basement and am leaning towards using 7/16" OSB over Delta-FL for the subfloor. I was also considering leaving some areas as bare cement (laundry room, utility room, ...
2
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1answer
440 views

How can I stiffen the subfloor of an upstairs bathroom?

I have been doing polished concrete throughout my house. My wife loves it more than I thought she would and now wants me to do it upstairs. I am afraid that the subfloor flexes too much, which ...
4
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2answers
439 views

Should I remove nailed-down plywood before laying tile?

In my bathroom there is vinyl on top of plywood, which is nailed to the sub floor. Should I pry up the plywood before putting down cement backer board for tile, or can I go over the plywood?
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2answers
113 views

How to fix pitched floors in a brick building

I'm looking at a property the was built in the lat 1800s. It's a 3 level brick building with two other building of similar stature on each side. I too a quick look at the second floor, and it pitches ...
7
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3answers
8k views

How can I prepare uneven concrete basement floor for vinyl planks?

I have roughly 600 sq ft of basement that needs new flooring after some unfortunate flooding this past summer. We had carpet over concrete and are now looking to lay vinyl planks down. There is about ...