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interplexr 02-27-2009 06:23 PM

To use red rosin paper or not with hardwood floors
I'm installing 5/16 Brazilian Walnut above a finished heated/air conditioned basement. I have installed a new plywood underlayment and am now ready to install the floors. The floors have been acclimated to the new room for 3 weeks. I have read conflicting opinions over whether to use felt paper, red rosin paper, or nothing. Would the red rosin paper be required or useful since the floor is over a finished basement where I am not worried about moisture? Are there other reasons to use it? I made sure to secure the subfloor and underlayment with screws to prevent squeaking.

Bob Mariani 02-27-2009 08:00 PM

not worrying about moisture in a basement, means that you do not understand basements. There is moisture to contend with. What did you place under your underlayment? Anyway over this you should use felt paper since you may not have dealt with the moisture properly. Other wise I would use rosin paper. Unless your concrete floor in the basement is over 25 years it will still be releasing moisture. Without a capillary break, this transfer will continue due to a pressure difference above and below the slab.

interplexr 02-28-2009 05:18 AM

I don't think I explained what I was doing very well. I'm not installing the floor in the basement. The floor is above the basement on the first floor. The house is over 25 years.

Just Bill 02-28-2009 06:20 AM

Definitely use rosin paper, unless the floor is glued down. The purpose of the paper is to isolate the subfloor and top floor from contact so that expansion/contraction will not cause squeaking. Felt used to be the standard, but rosin is a bit slipprier.

Bob Mariani 02-28-2009 06:49 AM

yes.. rosin for this installation

buletbob 02-28-2009 06:51 AM

I agree! :thumbsup:

canuck88 03-12-2009 10:36 AM

Felt paper all the way.

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