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Old 05-08-2013, 08:03 AM   #1
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How would I add another subfloor to my exisiting subfloor?


I have a room in my house that is 1/8" off from the rest of the house. I would like to get 1/8" plywood and add it to my existing sub-floor to even out the floors across the house. What I would like to know is how would I go about this? Should I just use a nailer to secure the second layer to my original subfloor or should I use screws? Do I need to screw them to the joist beneath the original subfloor or should I just screw it to the subfloor. Also if I do screw should I use deck screws with star heads for better grip? Any help would be greatful. Thanks in advance.

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Old 05-08-2013, 08:32 AM   #2
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How would I add another subfloor to my exisiting subfloor?


1/8" is not very much. What material will your finished floor be?
. If the variations in hight are at the transitions, you could use floor level compound in those areas to tapper out the difference about 2'-3'. That would barely be noticeable.


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Old 05-08-2013, 08:43 AM   #3
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How would I add another subfloor to my exisiting subfloor?


I'm laying down laminate flooring. it's about 1/2" thick. I wanted to make a continuous flow of the floor instead of putting down the between pieces. The transitions are at a doorway between the kitchen and the dining room and the entry way and the formal living room.
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Old 05-08-2013, 08:53 AM   #4
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How would I add another subfloor to my exisiting subfloor?


Quote:
Originally Posted by arnob
I'm laying down laminate flooring. it's about 1/2" thick.
Laminate floor requires transitions in order for it to expand. What do the instructions say about this for this product?

If the morning sun hits upon one room then the flooring in that room will expand at a different rate, thus tearing your good work apart. Transitions at the doorways or at the 16' to 20' lengths are generally required.
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Old 05-08-2013, 09:00 AM   #5
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How would I add another subfloor to my exisiting subfloor?


I have used a rubberized grout to create smooth transitions between tile and engineered hardwood with no problems.
Your laminate flooring is floating so this won't work. You'll have to use a "T" transition which can be glued and nailed.
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