I have been using the same method for 13 years Hand nail, 2″ on seams and 4″ in the field, and I always use luan underlayment rather than osb. I have never had a call back and I have been privilaged to re-remodel two jobs that I did years ago and I am glad that I dont glue down any of the underlayment. Also I have found that 3/8 luan gives the best final appearance if the job will allow the extra build up. GOOD LUCK
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