Home depot sells a sub floor board which is easy to install. It comes in 2'x2'sheets and could be leveled out for any irregularities in the floor it will give you a nice warm floor and it helps out with acoustics you can put any kind of flooring over it you want rug wood or easy to install laminate. it adds approximately, a inch to hight even after you add flooring this is the ideal thing to do for leveling comfort and acoustics.I have a article on acoustic property's if I can find it.each Pallet covers 70sq foot you wood need approximately, 3 link http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?jspStoreDir=hdus&catalogId=10053&productId=100388255&navFlow=3&keyword=sub+floor&langId=-1&searchRedirect=sub+floor&storeId=10051&endecaDataBean=com.homedepot.sa.el.wc.catalog.beans.EndecaDataBean%4059912410&ddkey=Search OVRX 35 Pk. 2 Ft x 2 Ft Sanded OSB Insulated Sub Flooring Tile
Model H2424OVRX
$279.65/Pallet
Model H2424OVRX
$279.65/Pallet