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Old 11-22-2013, 06:47 PM   #1
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Floor for slab on grade


We are converting our garage to a den. We are not sure what type of flooring we will put down but my wife and I really like carpet. No matter what we put down is there something that needs to go over this concrete first like plywood etc.? I have no idea? Thanks...
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Old 11-22-2013, 06:54 PM   #2
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Plywood should never be attached to a slab.
How was this garage built? Slab on grade, stem wall.
Was there a vapor barrier and foam insulation installed under the slab before it was pored?
Has a moisture test been done?
Is there a sloped floor?
What's the plan for the old over head door?
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Old 11-22-2013, 06:58 PM   #3
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Quote:
Originally Posted by joecaption
Plywood should never be attached to a slab. How was this garage built? Slab on grade, stem wall. Was there a vapor barrier and foam insulation installed under the slab before it was pored? Has a moisture test been done? Is there a sloped floor? What's the plan for the old over head door?
Don't know, don't know don't know....geeez. ...Not sloped ...overhead door...you mean garage door ?.. Framers built a wall in front of it.

We'll now that I think of it the rooms right next door have carpet pad and carpet right on the slab...
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Old 11-22-2013, 10:08 PM   #4
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Carpet and pad should be fine as long as you don't have moisture issues.
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Old 11-23-2013, 10:18 AM   #5
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Carpet and pad should be fine as long as you don't have moisture issues.
yep.....
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Old 11-24-2013, 01:39 PM   #6
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Have you permitted the garage conversion to living space? Often there are requirements and/or restrictions on doing so - such as where I live and converted my garage.
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Old 11-24-2013, 02:48 PM   #7
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Have you permitted the garage conversion to living space? Often there are requirements and/or restrictions on doing so - such as where I live and converted my garage.
I would never get code inspectors involved unless I must.
Probably, not a must on this.
Yes, carpet will be fine on a slab.
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Old 11-24-2013, 05:07 PM   #8
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Thanks a lot everyone . Are there any carpet pads or anything else I can put on the slab for some thermal protection? Thanks
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Old 11-24-2013, 05:32 PM   #9
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Just buy a 6 or 8 lb pad. Whatever your carpet specifies and it will make the floor warmer. Make sure you buy whatever thickness is specified, also. It can make a difference with wear.
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Old 11-24-2013, 06:56 PM   #10
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I've sold a special carpet cushion made especially for on and below grade slabs. It's waterproof, in that moisture and water does not hurt it, and unlike regular padding, it has an "R" factor of 4.5. Regular padding and carpet together might at best be 1.5.

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Old 11-24-2013, 07:12 PM   #11
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Quote:
Originally Posted by JazMan
I've sold a special carpet cushion made especially for on and below grade slabs. It's waterproof, in that moisture and water does not hurt it, and unlike regular padding, it has an "R" factor of 4.5. Regular padding and carpet together might at best be 1.5. Jaz
You sell it or you have bought it?

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Old 11-24-2013, 07:12 PM   #12
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Do they still make that Jaz?
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Old 11-24-2013, 07:48 PM   #13
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I would recommend a raised floor made of 2X6 and 3/4 plywood.
Remember that if you store gasoline or any petroleum based products in the garage if spilled, fumes tend to linger low along the slab!
If anybody naps or falls asleep in the room on the floor they could get sick from accidentally spilled products.
HOWEVER, if you raise the floor the fumes will still stay low and NOT go above the raised floor.
Spend the extra money and time to raise the floor. Additionally most garages are graded outward to allow water etc to run out of the garage. If you raise the floor you can level it, AND possibly insulate under the flooring, therefore making it warmer.
Just think about it!

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Old 11-24-2013, 08:01 PM   #14
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Originally Posted by brucem609 View Post
I would recommend a raised floor made of 2X6 and 3/4 plywood.
Remember that if you store gasoline or any petroleum based products in the garage if spilled, fumes tend to linger low along the slab!
If anybody naps or falls asleep in the room on the floor they could get sick from accidentally spilled products.
HOWEVER, if you raise the floor the fumes will still stay low and NOT go above the raised floor.
Spend the extra money and time to raise the floor. Additionally most garages are graded outward to allow water etc to run out of the garage. If you raise the floor you can level it, AND possibly insulate under the flooring, therefore making it warmer.
Just think about it!

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Don't think they intend to use it for a garage anymore. Should not be any solvents in there.
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Old 11-24-2013, 08:07 PM   #15
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Don't think they intend to use it for a garage anymore. Should not be any solvents in there.
he's talkin about what may have spilled and soaked into the concrete.
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