Structure above the floor joists and below any finished flooring.

learn more… | top users | synonyms

1
vote
0answers
35 views

How should I fill in pits in a concrete floor so I can install laminate?

I have these holes in the concrete floor, and I want to install laminate floor. What can I do to fill in these holes to get a nice level surface.
0
votes
1answer
20 views

Increasing subfloor thickness under new shower pan

I ripped my old shower down to the studs and joists. The studs were rotten, the subfloor was rotten, and the top of the joists (in some places) were weak and rotten. I plan on replacing some studs ...
2
votes
0answers
26 views

Stripping parquet floor glue to install underfloor heating

We have a huge lounge in our new house (in the UK) and it is covered with parquet flooring which we dislike. The little wooden blocks are starting to work loose here and there, so I don't see it as ...
3
votes
1answer
46 views

Is a leveled wood frame for a basement floor a good idea?

Just bought an old house. One half of the basement has a nice headroom. The floor is painted concrete, and is pretty uneven and ultimately slopes towards a floor drain. I'd like a nice floor. Can I ...
0
votes
0answers
19 views

DMX underlayment or DRIcore?

I've seen some great reviews of the underlayment like the DMX one step, but I see a lot of people still using the padded OSB product like DRIcore. Is there any benefit to using the DRIcore type of ...
0
votes
1answer
34 views

Additional Subfloor Layer - Glue or Red Rosin Paper

Currently my main level subfloor is joist, 1/2" plywood, then 3/4" partical board. I am in the process of replacing the partical board with 3/4" with Oriented Strand Board Tongue and Groove. After ...
1
vote
2answers
41 views

Misaligned floor joist hangers

What is the best way to resolve an issue with misaligned floor joist hangers? Our flooring in the kitchen is starting to dip and sag and it is directly related to the fact that the floor joists are ...
3
votes
1answer
81 views

How high can a 'sub floor' be raised withh plywood sheets?

Re-tiling the entryway to my home and had to remove the old mud floor that the old tile had been laid on top of. This lowered my floor by approximately 2" so now assume I need to raise by that much ...
4
votes
3answers
106 views

How to support the subfloor around a toilet between I joists

I'm replacing some rotted subfloor around a toilet, and I want to add blocking around the flange for extra support, and to give me a place to support the new pieces of subfloor (I'm not planning on ...
2
votes
1answer
46 views

Support for Tile floor

I have 2x8 (7.25x1.5) what appear to be doug fur or southern pine floor joists on 16" centers in a finished basement. I want to tile a master bath on the main floor. Joists span exactly 11' 4" from ...
0
votes
1answer
92 views

Finishing Attic Floor (Joists Blocking / Insulation)

I moved into a house built in the 1920's several months ago that has a finished attic where the former owner's two teenage boys were living. I want to go from the old ratty carpeting to nice floor ...
1
vote
2answers
74 views

HELP! Upgrading my kitchen to ceramic tile floor

So, I've decided to take on this big project. I have a 1/2" plywood subfloor with 3/4" MDF on top. Should I rip out my entire subfloor add a 3/4" t&g plywood then lay 1/2" plywood on top or am I ...
2
votes
0answers
41 views

Securing plywood “underlayment” to timber “sub-floor”

I am laying 12mm plywood on existing timber flooring (before laying Hardiebacker board & ceramic tiles) apart from screwing the ply to the sub-floor, should I also use grab adhesive, thinset tile ...
12
votes
3answers
991 views

How can I speed up the removal of stubborn tile?

I am trying to remove tile from the bathroom floor. It was installed in the 70s, and the pieces are tiny, 1 in x 1 in. I've been hammering away but they're not coming up very easily. Is there a ...
0
votes
1answer
55 views

What type of subfloor should be used for on grade for nail down engineered hardwood?

I am ripping up tiles on the ground floor of my home and would like to install 1/2 inch engineered hardwood. It is over a concrete slab on grade. What is the best and most economical way to do this ...
2
votes
3answers
66 views

Is this the correct approach for installing 3/4" Hardwood floor?

So I've been thinking of adding a hardwood floor in my dining room and hallway. This is what I know as of right now. I have Hemlock 2x10 Floor Joists spaced apart 16" OC that span 13 feet and the ...
2
votes
2answers
106 views

How can I level and finish a slanted deck that was enclosed?

Hello everyone I am new to this so I apologize if I seem a little slow mentally. I have a 104 yr old home that at one point had a deck that was completely enclosed. my issue is that the floor was ...
2
votes
0answers
55 views

Floor Makes Metal Clang When Walked On - One Room

We have a 3 bedroom, 2 bathroom house. The whole house has hard-wood flooring. One bedroom on the corner of the house has a floor that sounds hollow... When walked on it makes a loud clanging sound... ...
0
votes
0answers
65 views

How level does a wooden sub-floor need to be to put down engineered hardwood flooring?

We did a house expansion that pushed the walls out approximately 6' on 3 sides of a room. We built the foundation wall for the new floors to be 100% level but the old floors were not level in all ...
2
votes
1answer
115 views

Should I install a floating floor or a staple down for engineered hardwood?

I would like to to put down a DRIcore subfloor over my on grade concrete slab floor and then install engineered hardwood flooring on top of it. Should I staple the flooring to the DRIcore and if so ...
3
votes
2answers
215 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
votes
0answers
42 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
votes
0answers
42 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
913 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
46 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
318 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
55 views

When to use concrete plasticizer

When should one use a concrete plasticizer? Should it be used for internal floor slab?
0
votes
0answers
106 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 ...
3
votes
2answers
154 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
319 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
40 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
182 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
1k 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
21 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
130 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
56 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
449 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
123 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 ...
2
votes
4answers
1k 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 ...
3
votes
2answers
4k 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
148 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
362 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
2answers
2k 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
124 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
496 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
111 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
4k 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
328 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 ...
1
vote
2answers
100 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
322 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 ...