raising sunken living room floor ideas

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Topic by thatshouldbuffout posted 06-18-2013 09:48 PM 35296 views 0 times favorited 3 replies Add to Favorites Watch
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1 post in 2198 days

06-18-2013 09:48 PM

Topic tags/keywords: question sunken room raising floor

The home i purchased last fall had an addition put on it a little over 20 years ago. It is a large 17’x26’ room, used as the main living room for the house. The current flooring is carpet and the top of carpet is about 4” lower that the top of tile in the adjacent room (the entrance from the rest of the house to the room is a 6’ wide opening that used to open to the back yard.) The carpet is in poor condition and needs to be replaced. Pulling up the corners of the carpet exposes the concrete slab underneath that was not finished smooth- it appears rougher than a broom finish, and not very even. Ideally, I’d like to install wood floors in this room and installing anything but carpet I’m sure would require placing some self-leveling slab topping at a minimum. While replacing the floor, I would prefer to raise the floor to match the rest of the house elevation (to alleviate some worry living in a flood zone plus it would look better). The three exterior walls are wood framed (1 interior block wall) and there is a double door leading to the backyard. I have been thinking that pouring concrete would be the way to go, but am unsure how to treat it at the walls and door. I’d be okay with re-framing the exterior door opening to raise the door above the new floor. From what I’ve read, I understand that I would want to break the bond between existing concrete and new. How would I treat the concrete at the walls? Do I remove drywall and put formwork on the interior face of the wood studs and sole plate?

Would building a wood sub floor be more advisable? I think I would still need to level the existing slab if I went that route.

Thanks in advance for any suggestions or ideas.

View Dan Lyke's profile

Dan Lyke

331 posts in 4100 days

06-21-2013 08:38 PM

I bet that if you pull that carpet, you’ll be at about 4½” to 4¾” below the tile in the adjacent room, which is roughly what you’d get if you framed out 2×4s, put ¾” sheathing on top of that, maybe and underlayment, and a flooring surface. And that’d get you a little bit of flex out of the ¾” plywood sheathing, which will make it way more comfortable to stand on than concrete.

So if I were you, I’d frame and put a real wood floor in on top of that concrete.

-- Dan Lyke, Petaluma California, http://www.flutterby.net/

View melissatatum's profile


2 posts in 967 days

11-01-2016 11:45 AM

Nice post, I thoroughly enjoyed to read this content.

View markgrogan1's profile


11 posts in 85 days

05-01-2019 05:12 AM

My honest opinion is that the floor literally was never finished. If you had a bag of concrete sitting in storage, you could probably do a bang up job of working it to be a good base for the floors that you want to put in. Doesn’t sound like too difficult to do once you’ve pulled the carpet up.

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