Structure above the floor joists and below any finished flooring.

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2
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1answer
29 views

Is there any reason not to tile right over a freshly-laid block-and-beam subfloor?

The block-and-beam method of building subfloors is very popular in the UK: Once the blocks are laid, typically a thin bed of mortar or concrete is troweled or poured on top to secure everything. I ...
1
vote
1answer
29 views

Can I run a heated floor thermostat on a 30 amp sub panel with a 20 amp GFCI breaker?

Want to install a heated floor in bathroom. I would like to know if I can run it ona 30 amp subpanel wiht a 20 amp GFCI breaker.
1
vote
1answer
49 views

Can you lay subfloor on concrete before framing interior walls?

Our unfinished basement has a concrete floor and poured concrete walls. It has stayed completely dry all year for a decade since the house was built. I will be framing the exterior walls 1" from the ...
0
votes
2answers
53 views

Self-leveling alternatives to gypsum concrete (Gyp-Crete, Pyrofill, Securock) over OSB?

Replacement options for < 1.5 inch pour? Details: Bathroom remodel (new tub, tile wall/floor, toilet, vanity). Old tile floor came up with finger pressure, found that the gypsum concrete ...
1
vote
2answers
82 views

What is causing the defined ridge and sunken surrounding floor on my second story floor?

House was built in '87. A defined warp (or ridge) has gradually appeared on my second story floor, in line with the load bearing wall. It appears that the surrounding floor has sunk while the load ...
0
votes
1answer
24 views

Leveling floor assistance

Ripping up 3/4" particle board underlayment over 1/2" plywood subfloor. Running with the joists the floor is flat and level. But running perpendicular to the joists I have high spots every six to ...
0
votes
1answer
59 views

How to repair void in edge of subfloor from rot?

Started what I thought was an easy job of placing "peel and stick" tile and grout in my downstairs bathroom, but that was until I removed the quarter round at the base of the tub. It is not all the ...
0
votes
1answer
42 views

How to patch wood subfloor surrounded by gypsum/gypcrete?

I have a 1'x 2' of wood subfloor in a bathroom corner that is rotted as seen in the picture. It's 3/4" thick. Below it is around 22" of space and the neighbor downstair. I know that much, but I don't ...
2
votes
1answer
92 views

How to prep gypcrete bathroom subfloor that has wood around the toilet?

first time bath floor tiling. The subfloor is gypcrete concrete but around the toilet it is wood. The wood is rotting so I think I will take it out. But I don't know how to proceed. So a couple of ...
4
votes
2answers
1k 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. ...
2
votes
4answers
4k 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 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 ...
4
votes
2answers
63 views

Should we reinforce our laundry floor to prevent our washer from walking?

We have an LG front loading washer that vibrates violently and walks when it goes into the spin cycle. Our house is wood framed, built in 1991, and our laundry room floor is vinyl. We've had ...
4
votes
2answers
16k 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 ...
2
votes
2answers
107 views

How to flatten a plywood subfloor for tile?

I've got a 5/8" plywood subfloor in my bathroom. I'm prepping to install 1/4" Hardiebacker on top of that so I can install 12x24" marble tiles. In checking for flatness, I noticed there is a 1/2" drop ...
3
votes
1answer
95 views

basement subfloor - do i need sleepers for this solution

I'm going to install a basement subfloor. I want to follow option 3 from this site: http://homerenovations.about.com/od/additions/a/BasementSubfloor.htm. A nice option because the foam insulation ...
0
votes
1answer
58 views

How many screws do I need in my subfloor?

In my particular case, I'm building a tiny shed. I'm using ungrooved 3/4 inch treated plywood and no glue, if that makes a difference. I'm not sure what the relevant units are either. Pounds per ...
2
votes
3answers
180 views

How can I pour a concrete floor/slab with two levels?

I am pouring a slab for a concrete floor for an 1800 sq foot house and would like the bathroom area to be about 3/8" lower than the rest so I can tile it and wind up with the floor and seams that are ...
0
votes
0answers
25 views

Basement Floor Installation - Do I need a subfloor or can I use underlayment for warm floor

Live in Vancouver, BC. I'm in the drywall phase of my basement project and we would like to put down vinyl flooring. My unfinished basement has been ultra dry for the last 8 years as it has great ...
1
vote
2answers
33 views

Flattening Concrete for Dricore Product Suggestion

I am in the process of laying DRIcore panels in my basement. The ultimate plan is to lay laminate (Pergo) floor once we reach the finish stages. I have a few small areas where the concrete dips ...
2
votes
4answers
214 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 ...
5
votes
1answer
23k 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 ...
2
votes
1answer
48 views

Calculating floor load strength

Well I'm sure this had been covered over and over. I could not find the formula I seek. I'm building a storage room in the back of a large steel building on my property and I was thinking I'd use the ...
3
votes
2answers
53 views

Leveling Uneven Subfloor

BACKGROUND: Doing a kitchen remodel on our own, trying to open up existing kitchen into formal dinning room. As soon as the non-load bearing wall is gone, I have this small issue as shown in the ...
1
vote
2answers
164 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
votes
1answer
38 views

Help! Used Wrong Great Stuff

I was building a subfloor in my basement. 3/4" osb on top of 1" xps, and spray foam around the perimeter. I was in looking at Great Stuff foams saw Floor and Wall saw it was good for subfloors and ...
5
votes
5answers
1k 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
3answers
4k 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, ...
2
votes
2answers
66 views

Tiling over 1/2in subfloor with 1/2in Hardiebacker

I just pulled up the hardwood floor in the house I just bought, and found that there is 1/2in plywood subfloor. House was built in 1982. Joists are 2x10 16"OC. The room is 16x13. The person who ...
1
vote
1answer
33 views

Subfloor prep for hardwood install

We are doing a hardwood installation project. So far this has involved removing carpet and particle board to get down to the 1/2" plywood subfloor. The subfloor seems to be in a good shape, so I'm ...
3
votes
1answer
80 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 or thinset ...
2
votes
4answers
32k 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 ...
1
vote
2answers
399 views

How to install hydronic radiant heat over concrete slab

I'm trying to figure out the most ideal way to install hydronic radiant heat in my basement over the existing concrete slab. I've looked at several products for heat distribution, like Warmboard, ...
0
votes
2answers
102 views

Sealing OSB subfloor from moisture? Patching small gouges?

What are some methods that can be used to seal an OSB subfloor from moisture? And patch small gouges (quarter sized)? Background: Small Bathroom remodel. Tile came up with finger pressure, ...
0
votes
2answers
62 views

How two install hardwood floors in a long room with a subfloor that has a plane change in the middle?

I'm installing 3/4 oak hardwood floors in a long room (45') and the floor is flat, with one exception. The house is a 100+ year old brick townhome with the back half built at a later date. Midway ...
2
votes
3answers
71 views

Are there any things to consider when putting thick rubber underlayment down?

I am finishing my attic and have just completed laying the OSB subfloor. I plan to use this space as a yoga studio for my wife / guest room for family / playroom for my child. It is directly over my ...
1
vote
2answers
73 views

Proper Orientation for Plywood Subfloor under 3/4" Hardwood

I recently purchased a house in New Jersey and the 2nd floor was filled with old carpet that we wanted to replace with hardwood flooring. I ripped up the carpet only to find particle board under all ...
1
vote
1answer
41 views

Can level quik be poured over wood subfloor

HOME Depot will install Laminate in all the floor of my house. My first floor is concrete, my second floor is wood, they use level quik to level my second floor. My question is that if they can use it?...
0
votes
1answer
32 views

Do I need a vapor barrier on an 8" pour + carpeting over tile?

So I am finishing my basement and the side I'm finishing has an extra 4" pour on it as well as old 8x8 asbestos tile. My plan is to carpet over it. Do I need a vapor barrier? I get that concrete is ...
1
vote
2answers
5k 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 ...
1
vote
3answers
7k 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 ...
3
votes
3answers
398 views

What is the 2-inch layer of masonry under my bathroom tile?

My house is 1 story, but I have a basement so all the floors on the main level are "upstairs" and have a wooden subfloor. I ripped out the vanity in a bathroom I'm working on and starting taking out ...
1
vote
2answers
34 views

Carpeting over a ceramic tile patio- backerboard?

We have a 20ft x 10' second floor patio outside the master bedroom. Structurally, it is sound. The tile matches bedroom and rest of house- looks very nice. However, we want to put a good outdoor ...
0
votes
1answer
21 views

Best approach for squeaky subfloor fix, with some water stains

We are replacing the carpet in our kids room and want to tackle the subfloor as it squeaks. There are two questions I have: 1 We plan on screwing down the existing subfloor, do I need to remove any ...
0
votes
3answers
73 views

Drywall screws snap off when trying to fix squeaky subfloor

I am using 1 1/2 drywall screws from the top of the floor, to stop the squeak. Using screw gun and collated screws. The gun is snapping the heads off the screws, is this OK? And will it stop the ...
1
vote
3answers
182 views

Can I use self leveling compound to level old thin set over plywood subfloor?

The previous owner of my house tiled all the bedrooms on the second floor. I would like to remove all the tile and lay down hardwood flooring. So far I have removed the tile and now have all the thin ...
5
votes
4answers
175 views

Using leveling compound on plywood subfloor (second story)

I am doing an installation of 1/2" engineered hardwood on the second story of my home. Checking the plywood subfloor for true and level, I found a pretty big dip (1/2") Is this scenario an ...
3
votes
2answers
2k 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 that....
14
votes
6answers
15k views

Should I use nails or screws to refasten my subfloor to the joists?

My subfloor is squeaky, and there's a small window of opportunity I'll have to fasten it down before/during my carpet being replaced. I have available to me a nice corded drill, and an air-powered ...
1
vote
0answers
40 views

Raised floor in garage bedroom addition

Do I need to raise the floor to slab height of existing living space (garage floor is 6" lower than living space. I would probably say "yes" due some kind of code for residential flooding. Haven't got ...