Structure above the floor joists and below any finished flooring.

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2
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2answers
32 views

What type of subfloor should be used for Engineered hardwood flooring installed on grade concrete slab?

I would like to install engineered hardwood flooring over a concrete slab which is on grade. It is the first floor of the house, there is no basement and the house was built in the 1990's. I have seen ...
0
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0answers
15 views

vapor barrier between sub floor?

A friend and myself are building a cabin in southern california. It doesn't snow often where it is located. The cabin itself is setup on a post foundation and we are almost finished with the ...
0
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0answers
19 views

What type of soundproofing does floormuffler offer over a concrete floor?

My mom has a 2nd floor condo and has bought laminate flooring and I'm voluntold to install it. I'm curious if anyone has experience with cork and floormuffler (and similar products) on cement floors, ...
2
votes
2answers
55 views

What kind of screws are used for plywood subflooring?

I have removed the old bathroom lino and cleaned the parts that adhered to the floor. I want to screw down the existing plywood subfloor because the nails are old (45yrs) and sparse. What kind of ...
1
vote
0answers
33 views

Floor advice - gaps, leveling, sound improvements and materials

I am a new homeowner and thus new avid DIY enthusiast :) We recently had a new radiator installed and relocated, and had to remove all the existing materials. This is what I discovered (see image) ...
4
votes
1answer
58 views

Can particleboard subfloor be used as a nail base for 3/4" solid wood strip flooring?

Question: Has anybody out there laid solid oak strip floor over a 3/4" particle board subfloor and lived to tell about it? Basis for question: I did a search on SE and all answers point to pulling ...
1
vote
1answer
24 views

When to use concrete plasticizer

When should one use a concrete plasticizer? Should it be used for internal floor slab?
0
votes
0answers
64 views

Can I shave off half an inch of a crowned up 3 by 6" floor joist?

My subfloor is sloping up because of an very crowned up floor joist in the middle of the house. The house is build on footings, and floorconstruction is accessible from underneath. The footings are ...
2
votes
2answers
88 views

Does it make sense to put quality (=pricy) underlayment over 3/4“ subfloor+1/2” extra plywood layer?

I have standard subfloor + 1/2" plywood on top, to correct for joists going different directions, so that all hardwood boards can be laid one direction for a clean look and avoid sagging where they ...
4
votes
1answer
130 views

What can I do about a house with internal concrete floor with no DPM?

My partner and I have just bought our first home.A 1950's bungalow which is need of refurbishment. So far it has thrown us a ton of surprises! The worst so far being the floor in one of the bedrooms. ...
1
vote
1answer
21 views

Are there any special considerations for installing laminate on a 2nd floor?

I have installed a lot of laminate in 1st floor rooms, with concrete subfloors. No issues there. Now I'm installing in a second floor bedroom in a townhouse. Before I rip up carpet Im checking to see ...
1
vote
3answers
82 views

How should I finish a basement with a pitched floor?

I am building a room in the basement where the slab has a pitch. I have already installed had a foam and magnesium board subfloor and my intention is to have a carpet installed on top of that. The ...
1
vote
4answers
174 views

Hardie Board Subfloor—Thinset or No?

I'm remodeling the bathroom in my house that was built in the 1930s. I stripped out the old flooring down to the 1x8 wood planks (about 1/4" between each). I have 1/4" Hardie Board to put down in ...
0
votes
0answers
14 views

Tongue and groove subfloor

We are installing tongue and groove subflooring in a small (5' x 10') entryway. The base is cement, the subflooring is plywood with a plastic-like grid on back. Do we glue these down?
0
votes
1answer
75 views

How to correct possible subfloor l/360 deflection under live load, when basement below is finished

Installing porcelain planks 6"x 36" with 11mm thickness, in main floor Living room that was previously carpeted. House is 2 story town, 13yrs old. Room size across W 18' x Length joist span of ...
1
vote
1answer
44 views

How do I replace rotten Subfloor under a supporting post

Rotten Subfloor goes under support post of my lanai Roof. Best recommendation so far is to cut 3/4 inch thick end off a 2x4 (post is a 4x4) hammer under one side, scrape/chisel out other side of ...
2
votes
2answers
134 views

How should I install flooring over fresh concrete?

I have fresh concrete poured in my basement. Planing to use Metrofloor Engage Select vinyl plank for most of the floor. Contemplating ceramic tile for the bathroom if vinyl is not good enough for ...
0
votes
1answer
72 views

What screws for attaching 1/2“ ply to 3/4” ply?

I was using all-purpose screws (1 1/4") to attach my second layer of plywood to the under layer. The top layer does not get screwed into the floor joists. A lot of the screws just spin and don't sink ...
3
votes
4answers
345 views

Is it OK to use 1/4“ concrete backer board over 1/2” plywood as a bathroom subfloor?

I just bought a house built in 1978 and I'm planning on putting tile in the bathrooms (currently linoleum). The fixtures are removed and the flooring under the linoleum is particle board. I think ...
2
votes
2answers
1k views

How to level bathroom plywood subfloor before tiling?

In a bathroom remodeling project, I noticed the newly installed plywood sub-floor is flat but not level, which may cause issues when installing the shower and the sink cabinet (water evacuation and ...
2
votes
1answer
95 views

What grade of plywood should we use as subfloor under VCT tile?

What is the preferred grade of plywood we should use as a subfloor underneath commercial-grade Vinyl Composition Tile (VCT) tile (not vinyl peel & stick tile).
0
votes
1answer
135 views

How do I replace a sub-floor that goes under a wall before reaching the nearest I-joist?

In a bathroom, due to rotten sub-floor and remodelling, I have to remove the sub-floor and put a new one (we're changing the location of the shower and the sink; the plumber's going to make Swiss ...
1
vote
1answer
711 views

Should I replace bathroom OSB subfloor with plywood?

Before we begin, English is not my first language so my terms could be a bit wrong. Considering I'm planning to install 1/4" concrete backer-board over the sub-floor before tiling it again, is OSB ...
0
votes
2answers
68 views

Should we use regular plywood or Lauan over fir strip sub-floor before laying vinyl?

We are preparing a rental kitchen floor for sheet vinyl or VCT tiles. We currently have exposed 3" wide fir strips as the sub-floor. We were told we needed to lay 3/8" plywood over the fir for ...
2
votes
1answer
243 views

Bathroom subfloor replacement

I live in a house built in 1981 that has 16 inch spaced floor joists. In wanting to retile the bathroom I have discovered the plywood all around the toilet flange is junk, it expands about 12 inches ...
0
votes
1answer
73 views

Would cork flooring underlayment help with vibration dampening in a sub floor?

Related question: HE Front End Washer vibrations on wood floors: any tried-and-true solutions? In hopes of being able to keep our new front-end HE washer (which we like) I've decided to bite the ...
1
vote
2answers
1k views

HE Front End Washer vibrations on wood floors: any tried-and-true solutions?

We recently purchased a new washer and dryer set. It's a High Efficiency front loader washer with the high speed spin cycles. It's causing us grief. It vibrates like crazy. To the point where it's ...
1
vote
2answers
258 views

how do I level the floor in a sunk in living room

My home has a step down living room. It has carpet on it, but i want to make the floor level with the rest of the house it is about 2.5 inches step down. People keep tripping. I then either want to ...
0
votes
1answer
64 views

Bathroom remodel

I am in the process of redoing my upstairs bathroom. I would like to tile the bathroom floor. I have a tile-redi shower pan for the shower floor. Q1: Do I need to put a moisture barrier over the wood ...
1
vote
3answers
180 views

Can I remove parquet flooring adhesive by using a heat gun?

I have to remove a parquet floor with possible bitumen adhesive and am unsure how thick the adhesive was applied. I need to remove the flooring to prep for laying ceramic tiling. Could a heat gun ...
0
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0answers
50 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
2answers
90 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 ...
0
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1answer
44 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 ...
3
votes
1answer
131 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 ...
1
vote
3answers
73 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 ...
1
vote
1answer
88 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 ...
0
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0answers
53 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 ...
1
vote
1answer
1k 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 ...
0
votes
3answers
650 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 ...
5
votes
3answers
1k 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 ...
2
votes
1answer
173 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 ...
0
votes
1answer
442 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 ...
1
vote
2answers
3k 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 ...
0
votes
2answers
80 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 ...
2
votes
4answers
6k 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 ...
0
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2answers
58 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 ...
0
votes
2answers
1k 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 ...
1
vote
2answers
6k 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 ...
3
votes
1answer
7k 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 ...
1
vote
1answer
141 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 ...