NWFA Installation Guidelines require a vapor retarder for hardwood installations over wood subfloors. Rosen paper is not an acceptable vapor retarder over wood subfloors but NRF carries some great options that are manufacturer approved!
Silicone Vapor Shield from All Globe
Protects flooring from sub-floor moisture
Meets NWFA guidelines and significantly reduces cupping risk.
Tar and Petroleum based wax free, 100% recycled material
400 sq ft rolls
Aquabar "B" (Installer's First Choice)
Reduces moisture migration / Class II Vapor Retarder Membrane
NWFA accepted over wood subfloors.
Cleaner and easier to work with than roofing felt
501 sq ft rolls - Made in the USA
HWD-15
Class III vapor retarder
Reduces vapor flow without trapping moisture
Little to no asphalt rub-off, cleaner than roofing felt
432 sq ft rolls - Made in the USA