Garage conversion

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Forum topic by bnisimov posted 05-22-2019 03:35 AM 270 views 0 times favorited 7 replies Add to Favorites Watch
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14 posts in 1367 days

05-22-2019 03:35 AM

Topic tags/keywords: garage conversion

I’m trying to convert an attached garage to a bedroom we live in NY. There is a heated basement underneath the concrete slab.
Few questions.
1. what type of flooring should I consider. engineered hardwood tongue and groove the floating style or laminate?
2. the garage floor is not even. I was considering using a leveling mix but then got an idea of using 2 by 4 and just level the floor and add plywood over and then the flooring.
3. do I need a moister protection? since the garage does not get flooded and there is basement underneath of the garage. But i would imagine the concrete slab does have different temperature than the rest of the house.
4. i was also considering using some type of insulation in the floors. What should do you recommend?
5. maybe there is another forum where I can ask my questions?


7 replies so far

View LittleShaver's profile


537 posts in 1007 days

#1 posted 05-22-2019 12:40 PM

While I’m sure there are lots of folks on this site who can answer your question, I’d also try over at

-- Sawdust Maker

View ocean's profile


159 posts in 1221 days

#2 posted 05-22-2019 12:57 PM

You need to know how out of level your over all floor is. Focus on the the leveling first. A little don’t worry, a lot you will need some leveling compound applied to slab. You will get creaking sounds if you do not get it leveled properly. After that an under layment in most cases will add padding and a vapor barrier in one. You don’t say where you are. Climate will make your choice of insulation for you. Cold climate on concert slab means more insulation, warm simple underlayment will do. Hardwood is always the best, but laminate is cheaper.

-- Bob, FL Keys

View bnisimov's profile


14 posts in 1367 days

#3 posted 05-23-2019 03:39 AM

Hi, thank you for your reply.

I live in NYC.

1. When you say under laymen – can you give an example? but i would guess it depends on a manufacturer of hardwood or the laminate product.

2. wouldn’t i need to build floor up where the insulation would sit?

3. what type of insulation would you recommend?

Thanks a lot

View Horus's profile


37 posts in 56 days

#4 posted 05-23-2019 04:53 AM

Take a look at self leveling cement to level the floor. With heated living space below, you may not need a vapor barrier, but that’s inexpensive and easy to install – just some plastic sheeting or more expensive you could use tyvek.

With heated space below, you shouldnt need to insulate the floor. However, you’ll want to put some kind of subfloor in, unless your tiling the space – then I’d opt for in-floor heating (you can do that before the self-leveling cement to imbed it). Most garages aren’t heated well, so you’ll need to do something, kind of a two birds thing. If you heating the rest of the house with a boiler, you could tie into that system, if it’s big enough. Otherwise electric would work, but be more expensive to run. If you plan to run forced air, again check capacity of existing furnace, the inspector will…

Oh, that’s tight the question was about the floor… Take a look at the 2×2 ft subfloor panel, that are formed plastic down and plywood up, that may be adequate vapor barrier, check local codes. I like those panels, the floor isn’t so hard and sounds and feels more like living pace instead of a garage ( or basement).

Good luck.

Eschew obfuscation.


View Rich's profile


4478 posts in 977 days

#5 posted 05-23-2019 04:56 AM

Eschew obfuscation.

- Horus

I eschew mastication.

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

View MSquared's profile


522 posts in 302 days

#6 posted 05-23-2019 05:42 AM

+1 Thanks, Horus! Saved me a lot of typing!! Thinking of doing same for my garage shop in (slow) progress.

bnisirov – I’m a good bit East of NYC, but But as a life-time NY’er, I’m assuming you’re in the boroughs. Double check that ‘slab’. Make sure it’s structural (Rebar, Structural Steel, Steel Columns, etc.). ‘Slabs’ technically sit on the grade or ground, with a porous stone base.

‘Sketchy’ renovations are commonplace in those locales. Great, solid houses, but for good or for bad, many people worked on and added onto their homes themselves. Because they knew how. Well, not everybody!! Take a very close look before you start!

-- Marty, Long Island, NY

View ScottM's profile


736 posts in 2534 days

#7 posted 05-23-2019 02:58 PM

Most garages are not built for occupancy, so I’m assuming that you have it permitted for this type of conversion?

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