Questions tagged [subfloor]
Structure above the floor joists and below any finished flooring.
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Is 23/32 plywood too thick, heavy to be used as underlayment over 3/4 plywood subfloor?
I am finishing a project started by someone else so I don't know the logic behind material selection. It's a second floor Accessory Dwelling Unit stripped down to the 3/4 plywood subfloor except for ...
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Can I plane down the underside of 3/4" subfloor to match my existing 5/8"?
Current area, 10' x 12'
3/4" subfloor meeting the existing subfloor, 4mm too tall
I've had to replace the subfloor in my living room, but my existing subfloor is 5/8" plywood and I can't ...
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Remove/Replace Hot Mop Liner on Shower FLoor
After the demolition of our shower, I noticed our shower floor was water proofed with a hot mop method. This is all new to me (never even heard of hot mopping), so I was wondering if we need to ...
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Vapor barrier for cantilevered kitchen idea
Hi, all!
So I have this weird kitchen sitch, where it's cantilevered, and the back roughly 2-3 feet are hanging outside of the house. It's a dumb design, but what're ya gonna do?!
I had to have mold ...
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Shall I/How to Repair Falling Subfloor?
I happened to find the one piece subfloor under my dishwasher is falling. Shall I repair it? If yes, how to do that? The most professional way I suppose is to remove the cabinet and floor in the ...
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Can plywood permanently retain moisture in an isolated spot?
The subfloor on the main level of my townhouse has several very small isolated wet spots. There is a crawl space underneath, and I thought high humidity in the crawl space was the culprit, but I no ...
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Levelling my old bathroom subfloor for tile. Threshold height Issue
So I have a 1945 house with a bathroom that has a sloping floor. It is out of level 7/8". I have taken the floor down to the original plank subfloor which is 3/4" thick and perpendicular to ...
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How to replace a few Barricade subfloor panels
I have about 400 sq ft of 2'x2'x7/8" Barricade Subfloor Air Plus in my basement. After some recent water damage, I had to tear out approx. 15 panels (60 sq ft). I tried to buy the same product ...
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Vapor barrier under shed floor
I'm purchasing a shed that I intend to use as a home gym. On delivery, the shed will be uninsulated, aside from the roof which is metal with a bubble underlayment. The floor is a single layer of ...
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Is 1/2 inch OSB strong enough for subfloor
We just found out that the subfloors in our rental property are only 1/2 inch thick OSB. It has some moisture damage but we fixed what caused it and are replacing damaged ones.
We can't really afford ...
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Can I lay Engineered Wood floor over curved subfloor?
Is it ok to lay engineered wood floor over subfloor with such a dip in the middle? The existing floor is pretty even from board to board, but it does dip uniformly in the middle of the room. Would it ...
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Best Practices for Levelling / Replacing Plank Subfloor (c. 1950s)
Doing a complete remodel of our kitchen and I'm at the stage where I am going to take the subfloor out for plumbing work, etc. I also want to plan ahead for the eventual floor install. Photo 1 below ...
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Is DIY water mitigation possible in my case?
My dishwasher leaked in the night of Aug 1, the water went down into the basement ceiling, and went out to the exterior on top of the basement window. I noticed the leak the next morning. There might ...
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Vapor barier placement, radiant heat in floor above unconditioned space
I am building a four season room off the back side of my current home (12x16 room) and have been going back and forth about floor insulation and what hest source I want to use! I am in zone 5 in New ...
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What is the proper way to add another subfloor layer?
I am currently replacing carpet with hardwood flooring. The subfloor is OSB laid on-top of joists. The hardwood manufacture has recommended that a layer of 1/2 plywood be added to the subfloor in ...
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Soft spots on subfloor, how to fix (laminate installation)
When preparing to install laminate in a room, I discovered two soft spots on the subfloor after I removed old carpet and underlayment. Here is what they look like:
The spots are a few inches (10-20 ...
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How can I safely install/anchor a kitchen island over a subfloor with black asbestos mastic?
I'm hoping to install a kitchen island in the near future. However, my home was built in the 70s and thus asbestos is a concern. It appears the previous owner removed the old kitchen tile and ...
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Floor squeak -- what next?
I'm in the middle of a remodel of my downstairs master bath. There has always been a squeak in the floors and I knew when I started this project that was something I definitely had to fix. There is ...
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Temporary bathroom flooring before full remodel
We have mold underneath the old linoleum flooring in one of our bathrooms around the toilet. The linoleum is original to the house (37 years old). At some point in the next couple of years, we'll be ...
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Optimal floor for wood workshop over subflooring/crawlspace
I'm thinking of buying an old church (2200 sq ft, built in the 60's) to convert into a woodworking shop. The building is over a crawlspace and currently has carpet which I'll definitely want to ...
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Did my new flooring project just become a little more complicated?
Pics: https://imgur.com/a/MpIV7uP
I was removing the carpet padding when I found cracks. Home is slab concrete foundation, 60 years old. Thanks!
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How to Fix Cause of Rotten Subfloor?
I'm currently renovating my kitchen, and I removed the tiles and mud bed to reveal a chunk of very rotten subfloor. This section has clearly been replaced before, since it is plywood, and the majority ...
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Best way to attach plywood subfloor planks?
My home was build in 1906. I am installing tile and plan to use thinset and hardy board underneath. One room has a 1/2” particle board (not OSB) subfloor over 1”thick x 8” wide planks (probably fir) ...
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New, uneven LVP flooring in fixed-up 1960s home
My family moved into our first home a few days ago, originally built in the 60s, and which was fixed up by a previous investor.
We have LVP flooring in the living/kitchen areas, but the flooring seems ...
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Need to replace first layer of subfloor for vinyl install?
We're replacing linoleum in our kitchen with vinyl. The rest of the house has hardwood floors so the kitchen has a second layer of subfloor to make it even with the wood in adjacent rooms. Somebody ...
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1/4 plywood between existing floorboards and new hardwood?
I live in a 115 year old house that has existing 3/4 tongue and groove floorboards. While they seem sturdy, they are super ugly and have worn very unevenly, and unfortunately sanding won’t be a ...
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Course of actions to fix small (I think) rotten floor beside shower tub
Just moved in new (old) house, one tile beside shower tub in master bath were bouncing, I see cracks in the grout around, tile itself is pretty intact. Wondering best course of actions to fix those ...
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Using concrete patch to flatten plywood subfloor (in square recess in hardwood floor) before installation of cement board
I have a 4x4' hole (or recess) in my hardwood floor.
The bottom of the recess is 1/2" plywood instead of the recommended 3/4", because that's what would allow for the final tile installation ...
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Plywood subfloor: more seams or no stagger lesser evil?
I'm going to lay my 3/4 plywood sheathing subfloor perpendicular across my floor joists. My floor is 10x16.
I've read to use full sheets and avoid using half/cut sheets as well as not having the seams ...
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Attic conversion subfloor questions
I am converting my walk up attic into liveable space and would like advice on the specifics of the subfloor. The floor joists are 2x12s spaced 16" OC and currently there is 1/2" plywood ...
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I need some subfloor advice, please
I need some subfloor advice, please.
1. What size screws do you use to screw down the 3/4” plywood Subfloor to the floor joists?
2. The kitchen has two layers installed already. 3/4” Subfloor with a 5/...
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Is this mold in the crawlspace? Flip or flop?
We are looking at putting an offer in on this house but are hesitant because it was recently flipped. New everything cosmetic, looks like quality work. They also installed a new roof, HVAC +duct work,...
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I Need Subfloor Help Please
I need some advice please. I am redoing the floors in my parent's house. I need the floors as level as possible because we are going to install LVP flooring. The living room had carpet, but the ...
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Preparing addition room for a concrete slab, then dicovered old stair well hidden, how can this be dealt with?
An old addition room to a unit has structural issues, it was more than a hundred years old, and the floor structure was rotten, turns out they used a large beam in a reverse brick shelf right on the ...
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Lift laminate flooring to fix squeaky floorboard
I have laminate flooring installed on a mezzanine but the floorboards underneath are probably poorly nailed down and squeaking in some places. I was thinking to lift the laminate, fix them up with ...
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Are wood screws appropriate for subfloor with metal floor joists?
We recently purchased a new build and our upstairs floors are SO CREAKY. It's only a matter of time before the tile floors crack due to flexing. We pulled up some of the carpet in the bedrooms and ...
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Radiant heated floor makes noise after adding additional 1/2" of plywood
I have installed hydronic radiant heat pipes under the subfloor; used aluminum plates for spreading the heat from pex pipes.
The house is old, I think the original subfloor is 5/8 Douglas fir.
Up to ...
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Why is my shed floor staying damp?
I built a shed last summer at my recreational property. This winter when it was snowing, I was up in shed and the plywood floor got pretty wet. It seems to have never really dried dry out all winter. ...
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Upstairs shower pan on floor that bounces slightly
The context: The upstairs bathroom is being made larger. Separate tub, shower and other bits and pieces. An acrylic shower pan will be moved over an internal brick wall (below), and just into a room ...
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Slope dricore subfloor or not?
I have half an unfinished basement with sewage stacks sticking out above the concrete. I had used Dricore on one side easily, but this side is with the laundry area, the sewage stacks and the slope of ...
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Can I safely attach 7/16 OSB to particle board, and then put a floating floor on top?
I bought a condo (900 sq ft) that was carpeted (now all removed along with baseboard and all kitchen cabinets and appliances). Under the carpet is particle board. There are many uneven spots (...
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How to support hardwood floors with no existing subfloors to prevent squeaking in 100-year-old home
This is a follow up question to this old thread: Replacing hardwood floor in 100 year old house with no subfloor The house has hardwood floors installed directly on floor joists and the floors are ...
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Joist spacing for OSB subfloor and solid oak flooring?
I'm going to install 3/4" solid red oak hardwood upstairs, but the subfloor is old, creaky, and needs to be replaced. The floor joists are spaced 24" OC (on center), and change direction in ...
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Asbestos question - Old plywood on top of 1963 linoleum - Remove or attempt to prep for tile?
I'm replacing my vinyl flooring with tile, and when I removed it, I found that the previous owner had installed plywood over the original linoleum flooring. At first I was planning on just cleaning up ...
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Working with concrete-like float between plywood and flooring
I am total beginner, so please bear with me.
I live in a second floor condo unit (built around 1997). I recently removed a closet and discovered that my carpet rests on some sort of underlayment, ...
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Can I use angle bracing to support subfloor off the side of a joist?
Can I support an extra 10 inches of sub floor overhang with 2x10 angle pieces bolted to the side of a joist? It'd be a 6 foot run. I figure I'd space the angle pieces 10 to 12 inches apart and secure ...
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How do I approach replacing subfloor in a small space (23 sq. ft.)?
I’ve undertaken redoing my laundry room in a house I bought as-is. Yesterday, the plumber came to remove the washer and dryer, which were sitting on a loose piece of plywood on top of the floor- ...
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floor prep for LVP installation: need advice
I'm planning to float LVP (6.5mm) on 2nd store of our house (30+ years old). I'm currently working on a room that is 13' by 10'. I removed the carpet & padding, scraped and vacuumed. This is what ...
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How do I attach subfloor around perimeter with vent and exhaust in the way?
I had some water damage. We wanted to remodel anyways, so I ripped everything out, including the subfloor. Now it looks like this:
Here's the same angle, color-coded and labelled for reference:
...
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How the fix damaged subfloor over vent?
1946 house with all the wonders of years of questionable home renos, of which I am the latest in line. When I moved in I pulled the carpets for the lovely hardwood beneath but the carpet hid cracked ...
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