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Subfloors


wendans's Avatar
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05-07-10, 11:40 AM   #1  
Subfloors

Is it any better to put down two layers of 3/4" plywood or is it better to put down one sheet of 1 1/2". I have to have it that thick to match the floor height of the other room?

 
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05-07-10, 12:46 PM   #2  
Where can you find 1 1/2"? I don't know that I have ever seen that

 
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05-07-10, 01:51 PM   #3  
I had to do that to my living rm [1/2 of the rm was an addition built prior to my purchase] To save a few bucks, I stripped the floor with 3/4" and then covered it with 1/2" [which brought it level] and then installed 3/8" over both new and old. That's been 15+ yrs ago and no problems yet

I've seen 1" plywood but it was very expensive, never seen any ply thicker than that.


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05-08-10, 11:42 AM   #4  
If you need 1 1/2" then use 2 layers of 3/4" and stager the joints.
Glue and Screw.
Is this in 1 room or are you meeting another...(height wise)?

 
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05-08-10, 07:06 PM   #5  
Ok, sounds good.
Yes, it is where one room meets another.

 
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05-08-10, 07:17 PM   #6  
..So, I gather, the 1-1/2"s (or 2 - 3/4" ply) will meet the height of the other room's floor.
Are you planning on putting in a transition cap to bridge the 2 rooms.? -or run flooring thru the 2 rooms?

 
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05-08-10, 08:37 PM   #7  
We have not decided for sure what type of floor will go on it yet.

 
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05-09-10, 08:42 AM   #8  
Then that should be something to consider right there.
You have a chance to select a subfloor height that will result in a flush finished floor. I'd say wait till you decide on what you'll put down.

The 3/4 plywood will already take care of the structural integrity. So you can put that down even before you decide.

 
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05-10-10, 04:13 AM   #9  
Is there an advantage to gluing and screwing instead of just screwing?

Also, what is the proper distance between screws?

 
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05-10-10, 07:15 PM   #10  
Yes. Gluing adds additional strength and rigidity to the floor.
Normally, min 12" apart.

 
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