Structure above the floor joists and below any finished flooring.

learn more… | top users | synonyms

0
votes
0answers
19 views

Warm subfloor for vinyl planks in basement?

I'm considering using vinyl planks (Like Allures) for my basement reno. House is only 13 years old. Concrete is bare and in great shape (basement was unfinished). No moisture (poly + tape test), but ...
0
votes
2answers
45 views

Plywood for Bathroom Subfloor

I've ripped out the floor of my bathroom down to the joists. The bathroom is 5 ft x 4 ft. Should I use tongue and groove or can I use standard plywood? Does it matter?
3
votes
1answer
43 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 ...
0
votes
1answer
27 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 ...
4
votes
2answers
72 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 ...
0
votes
1answer
68 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 ...
1
vote
1answer
55 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 ...
0
votes
1answer
90 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 ...
0
votes
0answers
26 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
35 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 ...
3
votes
2answers
58 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 ...
2
votes
1answer
97 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 ...
0
votes
1answer
41 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 ...
0
votes
2answers
97 views

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

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 ...
2
votes
2answers
119 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 ...
2
votes
2answers
72 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 ...
1
vote
1answer
35 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 ...
0
votes
2answers
118 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 ...
1
vote
1answer
47 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
2answers
62 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 ...
0
votes
1answer
33 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
82 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 ...
3
votes
3answers
415 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 ...
0
votes
1answer
22 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
80 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 ...
2
votes
1answer
52 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 ...
1
vote
0answers
41 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 ...
5
votes
4answers
199 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 ...
2
votes
3answers
218 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 ...
1
vote
3answers
219 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 ...
0
votes
3answers
86 views

Is it Possible to Coat the Subfloor Around a Toilet Flange to Prevent Rot?

I'm renovating a bathroom. Is there some kind of paint or chemical that I can apply to the subfloor around the toilet flange to keep it from rotting?
1
vote
2answers
35 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 ...
4
votes
5answers
196 views

Can I build a wooden floor over an occasionally moist garage slab with a drain?

I would like to install a subfloor in my garage and turn it into an office. The floor is slanted all towards the middle where there is a drain. There has never been any water (that I've seen in the ...
1
vote
1answer
30 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
2answers
518 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
0answers
42 views

Thin-set mortar advise

I was advised by Home Depot tech and bought a thin-set mortar VersaBond. Then, after I came home, I watched a Home Depot video on how to prepare my kitchen cement floor for laying on a 13.5" X 13.5" ...
1
vote
2answers
30 views

Installing Basement Subfloor over 30-year-old Vinyl

I'm going to install a basement subfloor. I have 2 rooms that had vinyl squares glued down - a bathroom and laundry room. Can I lay down rigid XPS insulation and plywood directly over the vinyl and ...
3
votes
1answer
96 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 ...
2
votes
2answers
68 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 ...
0
votes
2answers
74 views

Do DRIcore panels need to be flat?

I want to install carpet tile over DRIcore on my concrete basement floor. The floor is far from flat; I would guess at least an inch or two of overall variation. Do I need to ensure the floor is ...
1
vote
1answer
76 views

What leveling precautions should one take with plywood subfloor for engineered hardwood nail down installation?

I installed the nail down engineered hardwood downstairs and did an OK job as far as leveling the subfloor is concerned. I sanded a few high spots down and even used a planer on an especially stubborn ...
1
vote
1answer
97 views

Can styrofoam be used between plywood to bring up floor height

I have a new room built but floor is lower than adjoining hall by 1 1/2 inch. Can I put rigid foam down over the plywood floor and top with plywood to match heights?
0
votes
1answer
202 views

How to flatten an uneven plank subfloor when the existing planks can't be removed?

The upper-floor master bedroom in my c. 1700 house has a plank floor laid across the joists which is quite old, if not original. The planks were apparently once 1/2", but in some areas of the room ...
0
votes
1answer
76 views

Secure subfloor underwall between joists

I jumped to quickly into cutting out subfloor in my bathroom and I am now trying to figure out how resolve the issue and get the new plywood in place and secured properly. I cut the sub floor to as ...
0
votes
0answers
52 views

replacing subfloor

How does one replace the sub floor? I will redo the bathroom and need to get to the pipes under the sub floor. This is the first layer of flooring... so it is installed before the walls went up. ...
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 ...
3
votes
3answers
258 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.
1
vote
1answer
65 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
3answers
64 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 ...