Structure above the floor joists and below any finished flooring.

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7
votes
2answers
533 views

What do I need to do to raise a subfloor?

We're installing an engineered wood flooring in a room that already has a plywood subfloor. The engineered flooring will be 1/4" shy of the height of the hardwood in the other rooms, so I'd like to ...
3
votes
2answers
428 views

Is it a good idea to put 1/4" XPS under engineered floors?

We're pulling out the carpet in a room next to a room with hardwood floors. After removing the carpet and putting down the engineered floor, we'll be 1/4" short of the hardwood. Options: Use ...
2
votes
1answer
1k views

Is it a good idea to repair a squeaky floor from above?

I have a second floor that squeaks, a lot. Attempts at using scored screws haven't helped much, and the carpet is due for replacement, so there is little concern about pulling it up. A contractor ...
5
votes
2answers
2k views

What type of subflooring should I use for a basement?

My basement has wall-to-wall carpet in the two bedrooms and living area. The carpet was probably from the 70's when the house was built and we decided to remove it. After removing the carpet from ...
2
votes
2answers
753 views

Should I apply waterproofer on the subfloor beneath a shower pan?

I'm going to be using the Kerdi shower pan and membrane to seal a steam shower. I understand the process of installing the membrane, deck and preparing the wall and ceiling substrate. This question ...
3
votes
2answers
3k views

How effective are angle-grinder wood discs for removing material?

I'm working on an old house with 2x8 T&G subfloor planks. All of the structure is sound and has been reinforced but there are areas where the edges of subfloor planks are not level. This has ...
2
votes
2answers
530 views

Installing subfloor and hardwood on top of concrete (2nd story)

I bought a condo in a triplex where I basically have all of the 2nd floor. Most rooms are on hardwood, while the rest is on laminate with a serious height difference of an inch and a half (hardwood ...
14
votes
5answers
5k 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 ...
8
votes
2answers
720 views

Drywall screws for subfloor

Are drywall screws suitable for attaching a 3/4" tongue-and-groove plywood subfloor? In this case, joists are 16" O.C. and no glue will be used.
5
votes
1answer
455 views

Replacing subfloor in bath

Working on a bathroom remodel project and found rot and water damage to the plywood subfloor around the shower area. The shower is 36" x 36", and the joists are 24" apart and his part of the subfloor ...
6
votes
2answers
2k views

How can I repair a hole in my subfloor?

I found this hole a while back when removing my old carpet: It was filled with a bunch of nice razor blades and nails, you know, the kind of stuff you just want to roll around in. I need to find a ...
8
votes
3answers
11k views

How do I deal with Particle Board Subfloors and Hardwood Flooring?

The house I recently purchased, built in 1973, has particle board subfloors. To clarify, this is not OSB and this is not just a particle board overlay over plywood -- the entire subfloor is 3/4" ...
4
votes
1answer
882 views

How do I remove musty smell in coat closet?

Recently moved into an older house (1950s built) and noticed that the coat closet has a musty smell. The coat closet is next to the front door and has one wall that is an exterior wall. It has ...
2
votes
2answers
637 views

What type of sub-floor is suitable for laminate flooring?

I'm planning to put laminate type of floating flooring on a floor. The floor has a sub-flooring of 3/4 inch planks and a sheathing of 1/4 inch plywood. I would like to remove the plywood because its ...
6
votes
3answers
870 views

What should go between a wood plank sub floor and a hardwood strip floor

I am about to install a hardwood floor into a room in my 1905 farmhouse. The subfloor is 8-12" wide 1" thick planks. The floor I am installing is 2-1/4" prefinished solid hickory tongue and groove. ...
6
votes
2answers
2k views

What's the minimum reasonable thickness for subfloor in my attic?

I want to install 4x8 sheets of T&G plywood in my attic for extra storage room, but there are so many different thicknesses. There will be extremely minimal traffic on this floor as I will only ...
5
votes
1answer
2k views

Filling holes in floor where heating ducts used to be?

I just bought a house which has been converted from forced air to hot water baseboard heating. Someone removed all of the ducts, but left the register covers in all of the floors on the first floor. ...
3
votes
1answer
3k views

How can I remove just one tongue-and-groove subfloor board?

I am not talking about laminate planks, but actual subfloor sections. My entire room consists of tongue-and-groove boards. I was under the impression that the point of this was so you didn't have to ...
1
vote
1answer
222 views

How can I locate the 2x8 boards beneath subfloor, backer board, mortar, and ceramic tile?

My floor is getting a little creaky in my bathroom. Unfortunately, it has ceramic tile over it (along with mortar and backer board). What I need to do is drill a clearance hole through the grout and ...
6
votes
3answers
5k views

How do I level a basement floor but not the slab underneath?

I'd like to install laminate floor on top of Delta FL in my basement. The basement slab is not level, it slopes (from all directions) towards a floor drain (that, via a pipe, leads to a sump pump) ...